US20040186441A1 - Connecting casing sections of an administering apparatus for administering, in doses, a product which can be delivered - Google Patents
Connecting casing sections of an administering apparatus for administering, in doses, a product which can be delivered Download PDFInfo
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- US20040186441A1 US20040186441A1 US10/767,737 US76773704A US2004186441A1 US 20040186441 A1 US20040186441 A1 US 20040186441A1 US 76773704 A US76773704 A US 76773704A US 2004186441 A1 US2004186441 A1 US 2004186441A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31553—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe without axial movement of dose setting member
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/582—Means for facilitating use, e.g. by people with impaired vision by tactile feedback
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/14566—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for receiving a piston rod of the pump
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3156—Mechanically operated dose setting member using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31563—Mechanically operated dose setting member interacting with a displaceable stop member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31566—Means improving security or handling thereof
- A61M5/31568—Means keeping track of the total dose administered, e.g. since the cartridge was inserted
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
- A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, e.g. an injection button
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Vascular Medicine (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Coating Apparatus (AREA)
- Cartons (AREA)
- Alarm Systems (AREA)
- Magnetic Ceramics (AREA)
- Transplanting Machines (AREA)
Abstract
An administering apparatus including a front casing section, a rear casing section connectable to the front casing section, a driven member carried by at least one of said casing sections for performing a delivery movement, a dose setting member for performing a dosing movement relative to the driven member to select said product dosage, and a dosing and drive device moveable rotationally about a rotational axis and translationally relative to the front casing section, wherein, when connecting the casing sections, the dosing and drive device is coupled to the driven member and the dose setting member such that a rotational movement of the dosing and drive device causes the dosing movement of the dose setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member, wherein at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections such that when connecting the casing sections, the casing sections are slid onto each other as far as a connecting end position and cannot rotate relative to each other.
Description
- This application is a continuation of International Application No. PCT/CH02/00412, filed on Jul. 22, 2002, which claims priority to German Application No. 201 12 501.3, filed on Jul. 30, 2001 and German Application No. 101 63 329.7, filed on Dec. 21, 2001, the contents of all of which are incorporated herein in their entirety by reference.
- The invention relates to administering devices and apparatus, and methods of their operation and use. The administering apparatus to which the invention relates can be inhalation apparatus, apparatus for oral ingestion of substances, including liquids, or other type of administering apparatus and the dosing portions thereof. In the case of administering apparatus comprising at least two casing sections, the invention relates to connecting the two casing sections. Examples of apparatus in accordance with the invention are injection apparatus, in particular injection pens and, more particularly, semi-disposable pens.
- WO 97/17095 describes an injection apparatus consisting of a dosing and activating module and a reservoir module which are detachably connected to each other. The reservoir module is designed as a disposable module, while the dosing and activating module is intended to be re-used—once the reservoir module has been used—with a new reservoir module. The reservoir module contains a reservoir for a product to be injected and mounts a piston rod which acts on a piston accommodated in the reservoir, to deliver product. The piston rod comprises an outer thread which is in threaded engagement with an inner thread of a dosing setting member. The piston rod is linearly guided, such that when the dosing setting member is rotated, the piston rod is moved in an advancing direction towards the piston and a slight distance between a front end of the piston rod and the piston is thus changed. The dosing and activating module and the reservoir module are connected to each other by being screwed or clicked on.
- An advantage of the design of the semi-disposable injection apparatus is that parts of the apparatus involved in dosing and delivery only have to be configured for delivering the contents of a single reservoir. Since, if repeatedly used, such parts would always have to be guided back again to an initial position, they would furthermore be exposed to a risk of damage which is not to be underestimated. The reliability of correctly selecting and delivering the dosage need not therefore be less for semi-disposable injection apparatus than for completely re-usable apparatus. Moreover, exchanging a complete reservoir module is simpler than exchanging only a reservoir.
- Assembling the dosing and activating module and a new reservoir module can nonetheless raise problems, in particular with regard to correctly selecting the dosage or dose for the first delivery of product or substance to be made once the modules are assembled. Because of the coupling between the piston rod, the dosage setting member and the dosing and activating module—provided for the purpose of dosing and delivering—there exists the danger that assembling the reservoir module and the dosing and activating module unpredictably effects the position of the dosage setting member or even of the piston rod. This problem can occur in any dosing and delivering mechanism in which the processes of dosing and delivering are performed separately, as is the case with injection apparatus. The problem is also not restricted to semi-disposable pens. Rather, this problem afflicts every administering apparatus in which the coupling between the piston rod or other driven member, the dosage setting member and a dosing and drive device—for dosing and delivery—is established by simply connecting two casing sections. Moreover, there is a desire—in particular when self-administering a product—for simplicity of handling, wherein simple handling not only advantageously increases the handling comfort, but also safety.
- An object of the present invention is to provide an administering device or apparatus having casing sections and a dosing and delivering mechanism, wherein the dosing and delivering mechanism has an initial state defined by assembling the casing sections, and to nonetheless simplify the assembly process.
- In one embodiment, the present invention comprises an administering apparatus including a front casing section, a rear casing section connectable to the front casing section, a driven member carried by at least one of said casing sections for performing a delivery movement, a dose setting member for performing a dosing movement relative to the driven member to select said product dosage, and a dosing and drive device moveable rotationally about a rotational axis and translationally relative to the front casing section, wherein, when connecting the casing sections, the dosing and drive device is coupled to the driven member and the dose setting member such that a rotational movement of the dosing and drive device causes the dosing movement of the dose setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member, wherein at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections such that when connecting the casing sections, the casing sections are slid onto each other as far as a connecting end position and cannot rotate relative to each other.
- In the case of an administering apparatus comprising at least two casing sections and a dosing and delivering mechanism the component parts of which are coupled to each other by assembling the casing sections, it is an object of the invention to obtain a defined initial state of the dosing and delivering mechanism by assembling said casing sections and to nonetheless simplify assembly.
- The invention relates to connecting a front casing section and a rear casing section of an administering apparatus, preferably an injection apparatus, which allows a product to be administered in a dosage or a number of dosages which can be selected. Accordingly, the injection apparatus comprises the front casing section and the rear casing section. The product is contained in a reservoir. The front casing section can form the reservoir directly, however, in some preferred embodiments, a container accommodated by the front casing section, for example a standard ampoule, forms the reservoir.
- The administering apparatus further comprises a driven member which is mounted by at least one of the casing sections, preferably the front casing section, such that it can perform a delivery movement by which a product dosage selected beforehand is delivered from the reservoir. Since the product is usually delivered by a piston accommodated in the reservoir moving in an advancing direction towards an outlet of the reservoir, a piston rod preferably forms the driven member of a dosing and delivery mechanism of the administering apparatus. The driven member may comprise two pieces connected fixedly, i.e., permanently, or can be formed as a one piece structure. In one preferred embodiment, the piston and the driven member are embodied as separate components, and a front end of the driven member pushes against a rear side of the piston for the purpose of delivering product.
- Furthermore, a dosage setting member forms part of the administering apparatus, serving to select the product dosage. For this purpose, the dosage setting member performs a dosing movement relative to the driven member and also relative to the front casing section. If the product is delivered by means of the piston and piston rod, then the dosing movement of the dosage setting member sets the maximum stroke of the piston rod for its delivery movement.
- In some embodiments, the injection apparatus comprises a dosing and drive device which can be moved translationally and rotationally about a rotational axis, relative to the front casing section. The dosing and drive device is connected to the rear casing section before the casing sections are assembled. The rear casing section can form a dosing element of the dosing and drive device, in that it can be rotated relative to the front casing section about a common longitudinal axis, in a connecting end position which it assumes once the casing sections have been assembled, i.e., once the connection has been established. In some preferred embodiments, however, the rear casing section is fixed in the connecting end position such that it cannot move rotationally and translationally relative to the front casing section, and correspondingly does not adopt a dosing function. The dosing and drive device is coupled to the driven member and the dosage setting member when the connection between the front and rear casing section is established, in some embodiments, directly by the connection itself being established, such that once the connection has been established, a rotational movement of the dosing and drive device causes the dosing movement of the dosage setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member.
- The driven member, the dosage setting member and the dosing and drive device can be coupled by each two of these components directly engaging in pairs, without interposing transfer members, as is preferred, but this does not rule out interposing one or a number of different transfer members.
- In some embodiments, the dosage setting member is preferably coupled to the driven member and at least one of the casing sections, preferably the front casing section, such that it can only perform the delivery movement jointly with the driven member and is moved counter to the advancing direction, relative to the driven member, by the rotational movement of the dosing and drive device. One direct engagement with the driven member is preferably a threaded engagement.
- In some embodiments, the rotational movement of the dosing and drive device is preferably transferred into a rotational movement of the dosage setting member or the driven member about the same rotational axis, in order to obtain the dosing movement of the dosage setting member. In some preferred embodiments, the dosing movement of the dosage setting member can be a combined translational and rotational movement or a purely translational movement. The delivery movement of the driven member is preferably a translational movement in the same direction and, in some preferred embodiments, along the same translational axis as the translational movement of the dosing and drive device. In the following, the rotational movement of the dosing and drive device will also be referred to as the dosing movement and its translational movement will also be referred to as the delivery movement. In some embodiments, the rotational axis and the translational axis of the dosing and drive device are particularly preferably identical. The dosing member preferably likewise moves translationally along this axis.
- In an exemplary, first preferred embodiment, the dosing and drive device engages directly, secured against rotating, with the driven member, in order—for the purpose of selecting the dosage—to firstly transfer the rotational movement onto the driven member and via the driven member onto the dosage setting member, such that the dosage setting member performs its dosing movement. In a second preferred embodiment, the dosing and drive device engages directly, secured against rotating, with the dosage setting member for the purpose of dosing, i.e., in this case, the dosage setting member participated in the rotational movement of the dosing and drive device, such that its dosing movement is composed of a rotational and a translational movement. In both embodiments, the driven member and the dosage setting member are coupled, preferably directly engaging, such that they perform the delivery movement jointly.
- In accordance with some embodiments of the invention, at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections. The at least one axial guide and the at least one engagement element interlock with each other when the connection between the casing sections is established and also after the connection between the casing sections has been established, in order to form a linear guide for the casing sections. The linear guide ensures that when the connection between the casing sections is established, the casing sections are slid onto each other as far as a connecting end position, secured—in some preferred embodiments, absolutely—against rotating relative to each other with regard to the rotational axis of the dosing and activating device. Preferably, no relative movement is possible between the casing sections except for the movement of sliding onto each other. Sliding the casing sections onto each other, axially and linearly guided, makes assembling the apparatus particularly simple. Furthermore, when establishing the coupling between the dosing and activating device and the driven member and the dosage setting member, it prevents unintentional rotational movements of the casing sections relative to each other from transferring undesirable rotational movements onto the driven member and/or the dosage setting member, wherein said rotational movements could cause a dosing movement of the dosage setting member, even if only due to response movements of the dosing and activating device to such unintentional rotational movements between the casing sections.
- If the front casing section and the rear casing section together form a latching means, in some embodiments, the latching means preferably comprises a latching block which only allows the two casing sections to be latched onto each other in a front end position of the dosing and drive device. In this case, axially guiding the casing sections onto each other in accordance with the invention has the other advantage that latching cannot be prevented by the fact that establishing the coupling moves the dosage setting member, when the casing sections are assembled. For the latter could have an effect on the front end position of the dosing and drive device.
- For linearly guiding the casing sections, the at least one axial guide may be formed directly on, i.e., in or on top of, a surface area of one of the casing sections. In some preferred embodiments, the axial guide forms a guide channel for the at least one engagement element of the other of the casing sections. The at least one engagement element is guided tightly on both sides as it slides in the guide channel. The at least one engagement element also may be formed directly on, i.e., in or on top of, a surface area of the other of the casing sections, as an axially short engagement cam or as an axially extended engagement rib.
- In some embodiments, it may be advantageous if a number of axial guides are formed on the surface area of one of the casing sections, spaced from each other in the circumferential direction. The number of axial guides are expediently arranged, uniformly distributed over the circumference of the surface area. Forming a number of axial guides, in particular forming a number of axial guides arranged uniformly distributed over the circumference, makes aligning the casing sections easier, since the casing sections can be slid onto each other in a plurality of pre-set rotational angular positions. Merely for the sake of completeness, reference may be made to the fact that a number of engagement elements can also be provided on the other of the casing sections, in particular a number of engagement elements which are likewise uniformly distributed over the circumference.
- In order to make aligning the two casing sections relative to each other easier with respect to their rotational angular position, in some embodiments a guide channel formed by the at least one axial guide can be tapered in a funnel-shaped widening at its end which when aligned faces the other of the casing sections. If two adjacently arranged protruding sections, for example ribs, each form an axial guide with their mutually facing side walls, then said protruding sections are tapered axially, so as to form the funnel-shaped widening. Furthermore, it is particularly advantageous if such protruding sections are tapered in the radial direction towards the surface area of their casing section, at their end facing the other of the casing sections. A combined axial and radial taper at the entrance of the axial guide, in particular into a guide channel, makes aligning the casing sections particularly easier. If a number of axial guides are provided on one of the casing sections, then a number of axial guides and possibly all the axial guides are tapered axially and possibly radially.
- What has been said above with respect to the one or more axial guides applies equally to the at least one or more engagement elements of the other casing section.
- If, before connecting the casing sections, the dosage setting member is connected to the front casing section and the dosing and drive device is connected to the rear casing section, as in some preferred embodiments, then the dosage setting member and a dosing element or dosing and drive element of the dosing and drive device are held by their respective casing section in pre-set rotational angular positions relative to the respective casing section. They are axially and linearly guided in the respective rotational angular position by their casing section.
- In some embodiments, the dosing element or dosing and drive element is held by the rear casing section in its discrete rotational angular positions by a releasable engagement, preferably a locking engagement. In some preferred embodiments, the engagement also simultaneously generates a clicking sound when the dosing element or dosing and drive element is moved from one rotational angular position to the next during its dosing movement, such that the dosing process is also acoustically indicated.
- The dosage setting member can be linearly guided by the front casing section in a non-releasable guide engagement. If the dosing movement of the dosage setting member is a combined rotational and translational movement, then the dosage setting member must of course be releasably fixed in pre-set rotational angular positions. In this case, the engagement between the dosage setting member and the front casing section may likewise be a locking engagement. The pre-set rotational angular positions of the dosage setting member and the dosing element or dosing and drive element are adjusted to the axial guide of the casing sections, such that when the casing sections are axially slid onto each other, the coupling between the driven member, the dosage setting member and the dosing and drive device is established without rotation in each of the rotational angular positions of the dosage setting member and the dosing element or dosing and drive element pre-set in this way.
- The dosing and drive device can operate manually, semi-automatically or fully automatically. In the first case, both the rotational dosing movement and the translational delivery movement are performed manually. In the second case, either the rotational dosing movement or the translational delivery movement is performed manually and the other movement is performed using motors or by means of another type of force application, for example by means of a spring force, when the user has triggered the corresponding movement using an activating or actuating handle or structure. In the third case, that of the fully automatic dosing and drive device, the dosing movement and the delivery movement are performed using motors or by means of another force, for example a spring force. In this case, only the dosage is selected manually, for example by means of one or more buttons, and the delivery movement is likewise triggered by the user using a corresponding activating handle of its own. In most embodiments, the administering apparatus in accordance with the invention is equipped with a manual dosing and drive device, which is then referred to as a dosing and activating device. Thus, whenever a dosing and activating device is mentioned, it is therefore the manual embodiment which is being referred to. Where a dosing and drive device is mentioned, this is not intended to restrict the invention with respect to being manual, semi-automatic or fully automatic, but rather to comprise each of these embodiments. The term “dosing and activating module” is, however, used in connection with all the embodiments of the dosing and drive device.
- The dosing and drive device can separately comprise a dosing element which performs the dosing movement and a drive element which performs the delivery movement. In some preferred embodiments, however, the dosing movement and the delivery movement are performed by the same body of the dosing and drive device which is therefore also referred to in the following as a dosing and drive element or dosing and activating element.
- The product or substance to be delivered or administered may be a fluid, particularly a liquid, having a medical, therapeutic, diagnostic, pharmaceutical or cosmetic application. The product can for example be insulin, a growth hormone or also a thin or thick, pulpy food. An administering apparatus in accordance with the present invention may be employed in applications in which a user self-administers the product him/herself, as is, for example, common in diabetes therapy. However, its use in the field of in-patients or out-patients, by trained staff, is not excluded.
- In the case of an injection apparatus, the product can be administered by means of an injection cannula or a nozzle (for needle-free injections). The product can be injected or infused subcutaneously or venously, or also intramuscularly. When administered by inhalation, the selected product dosage can be delivered from the reservoir into a chamber of the inhalation apparatus and vaporized for inhalation by means of a vaporizing means. Furthermore, oral ingestion is conceivable, or administering via the esophagus, to name but a few administering examples.
- In some preferred embodiments, the administering apparatus is semi-disposable. In this case, the front casing section is a support for a reservoir module which is disposed of or recycled once the reservoir has been emptied, and the rear casing section is a support for a dosing and activating module which can be repeatedly used in conjunction with a new reservoir module. Since the reservoir module can also be treated separately as a disposable module, it is also a separate subject of the invention. The dosing and activating module can also be also a separate subject of the invention. Equally, a system consisting of an administering apparatus and at least one reservoir module, which can replace the reservoir module of the apparatus once it has been used, forms a subject of the invention. The duplex design of the administering apparatus, divided into a portion provided for use only once and a portion provided for repeated use (semi-disposable), is advantageous for injection pens in particular, but also for inhalation apparatus or apparatus for orally ingesting a product or for artificial feeding.
- FIG. 1 illustrates two portions of a reservoir module in accordance with a first embodiment of the present invention;
- FIG. 2 illustrates the reservoir module formed by the two portions of FIG. 1;
- FIG. 3 illustrates a perspective view of an injection apparatus including the reservoir module of FIG. 2, in accordance with the first embodiment, in a longitudinal section;
- FIG. 4 illustrates a portion of the injection apparatus of FIG. 3;
- FIGS. 5a-5 c illustrate a mechanism holder of the reservoir module, in a longitudinal section and two views;
- FIGS. 6a-6 d illustrate a blocking device for a piston rod, mounted by the mechanism holder;
- FIGS. 7a, 7 b illustrate a piston rod in a longitudinal section and a front view;
- FIGS. 8a-8 c illustrates a latching block in a longitudinal section, a view and a top view;
- FIG. 9 illustrates a second embodiment of an injection apparatus of the present invention;
- FIG. 10 illustrates the cross-section A-A of FIG. 9;
- FIG. 11 illustrates the cross-section B-B of FIG. 9;
- FIG. 12 illustrates the cross-section C-C of FIG. 9;
- FIG. 13 illustrates the cross-section D-D of FIG. 9;
- FIG. 14 illustrates a perspective view of the mechanism holder of the second embodiment of the present invention;
- FIG. 15 illustrates the mechanism holder of FIG. 14, in a view;
- FIG. 16 illustrates the cross-section A-A of FIG. 15;
- FIG. 17 illustrates a perspective view of the dosage setting member of the second embodiment;
- FIG. 18 illustrates a longitudinal view of the dosage setting member of FIG. 17;
- FIG. 19 illustrates the dosage setting member of FIG. 17;
- FIG. 20 illustrates a top view of the dosage setting member of FIG. 17;
- FIG. 21 illustrates a portion of the injection apparatus in accordance with FIG. 3; and
- FIG. 22 illustrates a portion of the injection apparatus in accordance with FIG. 9.
- FIG. 1 shows a view of a
reservoir part 1 and amechanism holder 3, which are connected to each other to form thereservoir module 10 shown in FIG. 2. - In FIGS. 1 and 2, a piston rod can be seen which protrudes, on an end of the
mechanism holder 3 facing away from thereservoir part 1, into themechanism holder 3 and is coupled to, or mounted or carried by themechanism holder 3 such that it can shift in an advancing direction pointing in the longitudinal axis L of thepiston rod 4, towards a front end of thereservoir part 1 facing away from themechanism holder 3. Thereservoir part 1 is substantially a hollow cylinder which has a circular cross-section and comprises a connecting region at its front end for connecting to a needle holder for an injection needle. Thereservoir part 1 serves to accommodate a reservoir container which in the exemplary embodiment is formed by anampoule 2 which can be seen in the longitudinal section in FIG. 3. An outlet at the front end of theampoule 2 is sealed fluid-tight by a membrane. When the needle holder is fastened to the front end of thereservoir part 1, a rear portion of the injection needle pierces the membrane, such that a fluid connection between the tip of the hollow injection needle and thereservoir 2 is established. - FIG. 3 shows the injection apparatus in its entirety, in a longitudinal section. A piston is accommodated in the
ampoule 2 such that it can shift in the advancing direction towards the outlet formed at the front end of theampoule 2. Shifting the piston in the advancing direction displaces product out of theampoule 2 and delivers it through the outlet and the injection needle. - The piston is advanced by the
piston rod 4 which pushes against the piston via its front end and thus moves the piston in the advancing direction when advanced itself. Thepiston rod 4 is held by themechanism holder 3 such that it can be moved in the advancing direction once a certain resistance has been overcome, but not counter to the advancing direction. Thepiston rod 4 is prevented from moving backwards, counter to the advancing direction, by a blocking means 8. The blocking means 8 is axially fixed by themechanism holder 3, i.e. it is held in themechanism holder 3 such that it cannot be moved in and counter to the advancing direction. It is, however, mounted by themechanism holder 3 such that it can be rotated about the longitudinal axis L. The blocking means 8 also generates the resistance which has to be overcome in order to move forwards. - The blocking means8 is shown on its own in FIG. 6. It is formed by a one-part annular element which, rotatable about the longitudinal axis L, abuts the
mechanism holder 3 between two facing, spaced collars 3 b which protrude radially inwards from an inner surface of themechanism holder 3. The collars 3 b form a fixing means for axially fixing the blocking means 8. How the blocking means 8 is mounted in themechanism holder 3 is most clearly seen from the representation of themechanism holder 3 in FIG. 5. - A dosage setting member9 is accommodated in the
mechanism holder 3. The dosage setting member 9 is formed as a threaded nut and is in threaded engagement with an outer thread of thepiston rod 4. The dosage setting member 9 is secured against rotating by themechanism holder 3, but is guided such that it can move axially and linearly in and counter to the advancing direction. Thepiston rod 4 and the dosage setting member 9 form a spindle drive for selecting the product dosage to be administered. - The
ampoule holder 1 and themechanism holder 3 are connected to each other, secured against rotating and shifting, and together form thereservoir module 10 of the injection apparatus, saidreservoir module 10 comprising thepiston rod 4 held by themechanism holder 3 by means of the blocking means 8, and the dosage setting member 9. Theampoule holder 1 and themechanism holder 3 together form a front casing section of the injection apparatus. Arear casing section 11 is connected to saidfront casing section 1′ in a positive lock. Therear casing section 11 forms the support for a dosing and activatingelement 12 and, together with the dosing and activatingelement 12 and parts of a latching means and other parts, forms a dosing and activatingmodule 30 of the injection apparatus. - Except for the dosage setting member9, the
piston rod 4 and the blocking means 8, a dosing and activating device comprises the other components for selecting the product dosage and activating the injection apparatus. In particular, it comprises the dosing and activatingelement 12. The dosing and activating device further comprises a counting and indicatingmeans 17 for counting and optically indicating the selected product dosage. Not least the counting and indicatingmeans 17 makes the dosing and activating module 30 a high-grade and therefore expensive part of the injection apparatus. While the comparativelyinexpensive reservoir module 10 is designed as a disposable module, the dosing and activatingmodule 30 is intended for repeated use, with consistentlynew reservoir modules 10. - For selecting the product dosage, i.e., for dosing, the dosing and activating
element 12 can be rotated about the longitudinal axis L and is furthermore mounted by therear casing section 11 such that it can linearly shift along the longitudinal axis L, in and counter to the advancing direction. The dosing and activatingelement 12 is hollow cylindrical and surrounds thepiston rod 4 via a front section. A rear section of the dosing and activatingelement 12 protrudes out beyond a rear end of thecasing section 11. A rod-shaped dosing slaving means 13 is inserted into the dosing and activatingelement 12 from the rear, as far as a collar of the dosing and activatingelement 12 protruding radially inwards. Furthermore, at the rear end, aclosure 14 is inserted into the dosing and activatingelement 12, as far as the dosing slaving means 13. The dosing slaving means 13 is axially fixed relative to the dosing and activatingelement 12 between the radially protruding collar of the dosing and activatingelement 12 and theclosure 14. The dosing slaving means 13 is also connected, secured against rotating, to the dosing and activatingelement 12. For the purpose of dosing, the dosing slaving means 13 protrudes into thehollow piston rod 4 from the rear. Thepiston rod 4 comprises a connectingsection 4 a (FIG. 4) which engages with the dosing slaving means 13 such that thepiston rod 4 and the dosing slaving means 13 and therefore also the dosing and activatingelement 12 cannot be rotated relative to each other about the common longitudinal axis L, but can be moved relative to each other along the longitudinal axis L, in and counter to the advancing direction. For this purpose, the connectingsection 4 a is formed as a linear guide for the dosing slaving means 13. - A restoring means16 elastically tenses the dosing and activating
element 12 counter to the advancing direction, into the initial position shown in FIGS. 3 and 4. In the initial position, the product can be dosed by rotating the dosing and activatingelement 12 about the longitudinal axis L. Then, from the initial position, the selected product dosage can be delivered by axially shifting the dosing and activatingelement 12. The restoring means 16 is formed by a spiral spring acting as a pressure spring, which is accommodated in an annular gap around the dosing and activatingelement 12 and axially supported between a collar of thecasing section 11 protruding radially inwards and a collar of the dosing and activatingelement 12 facing opposite and protruding radially outwards. - The blocking means8 fulfils a double function. On the one hand, it ensures via its
blocking elements 8 a that thepiston rod 4 cannot be moved back, counter to the advancing direction, relative to themechanism holder 3 and therefore in particular relative to the piston accommodated in theampoule 2. In its double function as a brake, the blocking means 8 furthermore prevents thepiston rod 4 from moving forwards during the dosing process in which the dosage setting member 9 is moved axially, counter to the advancing direction, towards the dosing and activatingelement 12. - In the initial position shown in FIGS. 3 and 4, before dosing, the dosage setting member9 abuts against a
delivery stopper 3 c (FIG. 5) formed by themechanism holder 3, in the advancing direction. Thepiston rod 4 is in permanent touching contact with the piston. For the purpose of dosing, the dosage setting member 9 is moved away from thedelivery stopper 3 c towards the dosing and activatingelement 12 by the threaded engagement with thepiston rod 4 and the linear guide from themechanism holder 3. This reduces a slight distance between a rear stopper area of the dosage setting member 9 and a front stopper area of the dosing and activatingelement 12, but on the other hand increases the slight distance between a front stopper area of the dosage setting member 9 and thedelivery stopper 3 c. The latter distance between thedelivery stopper 3 c and the dosage setting member 9 is the path length by which the dosage setting member 9 and—due to the threaded engagement—also thepiston rod 4 are moved in the advancing direction in the course of the delivery movement of the dosing and activatingelement 12. Thedelivery stopper 3 c forms a front translational stopper. During the delivery movement, thepiston rod 4 pushes via its front end, which is formed by a plunger body connected to thepiston rod 4 such that it cannot move in or counter to the advancing direction, against the piston and pushes the piston forwards in the advancing direction towards the outlet of theampoule 2. The longitudinal axis L forms the rotational and translational axis of the movements which are performed for the purpose of dosing and delivering the product. - The distance which the dosage setting member9 and the dosing and activating
element 12 exhibit between each other during the dosing process when the dosage setting member 9 abuts against thedelivery stopper 3 c corresponds to the maximum product dosage which can be selected and delivered in the course of a delivery. The stroke movement of the dosing and activatingelement 12 is of equal length for each delivery. Dosing merely sets the distance between the dosage setting member 9 and thedelivery stopper 3 c and therefore the path length which can be jointly traveled by the dosing and activatingelement 12 and the dosage setting member 9 in the course of delivery. - The braking function of the blocking means8 and the braking engagement which exists between the
piston rod 4 and the blocking means 8 for this purpose are clear from an overview of FIGS. 6 and 7. On the one hand, the blocking means 8 comprises two braking elements 8 b for the braking engagement, which are each formed by an elastically flexing catch, like theblocking elements 8 a before them. In the exemplary embodiment, the blocking means 8 is formed by a single annular element from which four elastic catches axially project on an abutting side. The catches are arranged in a uniform distribution over the circumference of the annular element. Two mutually opposing catches form theblocking elements 8 a and the other two catches, likewise arranged mutually opposing, form the braking elements 8 b. - The
piston rod 4 accordingly comprises two returning blocking means 6, which are formed on the outer surface on opposing sides and extend in the longitudinal direction of thepiston rod 4, and two advancing braking means 7, which likewise extend in the longitudinal direction of thepiston rod 4 on mutually opposing sides. The thread of thepiston rod 4 for the threaded engagement with the dosage setting member 9 is formed by four remaining threaded sections 5 which extend over almost the entire length of thepiston rod 4. The returning blocking means 6 and the advancing braking means 7 are each formed by a row of teeth. However, while the teeth of the returning blocking means 6 are formed as serrated teeth, narrowing in the advancing direction and comprising blocking areas pointing backwards and extending transverse to the advancing direction, the two rows of teeth which form the advancing braking means 7 do not comprise blocking areas pointing forwards having a comparable blocking effect. The teeth of the advancing braking means 7 each exhibit a “softer” tooth profile as compared to the returning blocking means 6. For the braking engagement between the blocking means 8 and the advancing braking means 7 of thepiston rod 4 is not intended to prevent thepiston rod 4 from being advanced, but merely to make it more difficult, in order to ensure that thepiston rod 4 is not moved in the advancing direction during dosing. The front sides of the teeth of the advancing braking means 7 and the rear sides of the braking elements 8 b, which touch the front sides of the teeth of the advancing braking means 7, are shaped such that a threshold force which is not reached during dosing has to be overcome in order to overcome the braking engagement. This threshold force is larger than the force required to move the teeth of the returning blocking means 6 over the blockingelements 8 a in the advancing direction. The threshold force is preferably at least twice as large as the initial frictional force between the returning blocking means 6 and theblocking elements 8 a. The frictional force between the latter also only increases gradually between two consecutive blocking engagements in the course of the advancing movement. The threshold force of the braking engagement, by contrast, has to be applied from one blocking engagement to the next, immediately at the beginning of the advancing movement, in each blocking engagement. The threshold force should not, however, be so large that it distracts the user during delivery. - An undesired advancing movement by the piston rod as a response to the movement by the dosage setting member9 when selecting the dosage can in principle also be prevented by the blocking engagement of the blocking means 8 alone. However, such a movement is more reliably prevented because of the braking engagement than by the blocking engagement alone.
- The connection between the
reservoir module 10 and the dosing and activatingmodule 30 is a positive lock. On the one hand, a latching engagement exists between themechanism holder 3 and thecasing section 11 which prevents relative movement in the axial direction. Beyond the latching engagement, thefront casing section 1′ and therear casing section 11 are guided axially and linearly directly onto each other, in order to prevent relative rotating when connected or connected. Theaxial guides 3 d of themechanism holder 3, which together with one or more corresponding engagement elements of therear casing section 11 form the linear guide, can be clearly seen in FIG. 5. Theaxial guides 3 d are formed by guide areas on guide ribs; they could also be formed by guide areas in axially extending recesses. In this way, axial guide channels are obtained. The guide ribs are axially tapered, such that insertion funnels leading into the guide channels are formed for the one or more engagement elements of therear casing section 11. In order to even better center thecasing sections 1′ and 11 at the beginning of connecting, the guide ribs are also tapered in the radial direction. The one or more engagement elements of therear casing section 11 is or are preferably formed like theaxial sections 3 d on the surface counter area, i.e. the inner surface area, of therear casing section 11. - The latching engagement exists between a first, female latching element3 a of the mechanism holder 3 (FIG. 5) and a latching
ring 20 which is connected to therear casing section 11 such that it can move radially but not axially. The latchingring 20 forms a second,male latching element 21 which radially engages directly with the first latching element 3 a. A lock/latch connection exists between the first latching element 3 a and thesecond latching element 21 which prevents thereservoir module 10 and the dosing and activatingmodule 30 from moving axially relative to each other. - FIGS. 3 and 4 show the latching
element 21 in latching engagement with the latching element 3 a. The latching element 3 a is formed by an annular stay and a groove which runs around the outer surface of themechanism holder 3. The annular stay forms a rear side wall of the groove. Thesecond latching element 21 is formed by a cam which protrudes radially inwards from the inner surface of the latchingring 20 and which in the latching engagement is pushed radially inwards over an inner surface area of therear casing section 11, protruding into the accommodating latching element 3 a, by a restoringmeans 24. The latchingring 20 is supported in its entirety in the radial direction on an inner surface area formed by therear casing section 11, by means of the restoring means 24, such that the restoring means 24 pushes against the outer surface of the latchingring 20 roughly in a radial extension of the latchingelement 21. The latchingring 20 surrounds themechanism holder 3 and can be moved in its entirety radially back and forth against the restoring force of the restoring means 24, such that thesecond latching element 21 can be moved in and out of latching engagement with the first latching element 3 a. Therear casing section 11 forms a tight sliding guide for the radial movement of the latchingring 20. On its side radially opposite the latchingelement 21, the latchingring 20 forms anunlatching button 22 for the user. In order to radially guide the restoring means 24 formed as a pressure spring, a guide cam projects radially from the outer surface area of the latchingring 20 facing away from the latchingelement 21. - Two blocking
cams 23, which press radially outwards against a latchingblock 25, furthermore project from the outer surface area of the latchingring 20, in the circumferential direction on both sides of said guide cam and axially behind the guide cam. Since the blockingcams 23 abut against the latchingblock 25, a radial movement of the latchingelement 21—which could result in the latching engagement being released—is prevented. The latching engagement between thelatching elements 3 a and 21 is thus secured by the latchingblock 25. The latching engagement is secured in every position of the dosing and activatingelement 12, except for a releasing position which the dosing and activatingelement 12 assumes at the end of its delivery movement. The releasing position therefore coincides with the foremost shifting position which the dosing and activatingelement 12 assumes when it abuts the dosage setting member 9 in the course of its delivery movement and the dosage setting member 9 for its part abuts against thedelivery stopper 3 c of themechanism holder 3. Providing the dosing and activatingmodule 30 is not yet connected to the reservoir module, a mechanical stopper for the dosing and activatingelement 12 is formed by astopper element 31 of the dosing and activating device. In the exemplary embodiment, a reset holder ring which serves to reset theindicator 17 forms thestopper element 31. The dosing and activatingelement 12 abutting against saidstopper element 31 defines the releasing position of the dosing and activatingelement 12 in this case, the releasing position defined by thestopper element 31 corresponding to that defined by the dosage setting member 9 abutting thedelivery stopper 3 c. - FIG. 8 shows the latching
block 25. In the exemplary embodiment, it is formed as one piece by a blocking slider. The latchingblock 25 comprises a plate-shaped main body which extends axially when assembled, as for example shown in FIG. 4. At one end, astay 26 projects at right angles from the main body. When assembled, thestay 26 extends radially as far as the dosing and activatingelement 12. Thestay 26 serves to fasten the latchingblock 25 to the dosing and activatingelement 12 which for this purpose comprises two annular stays formed axially spaced on an outer surface area, which form the slaving means 15 a and 15 b. The front slaving means 15 a simultaneously forms the support collar for the restoringmeans 16. In the annular space formed between the slaving means 15 a and 15 b, the latchingblock 25 protrudes in via itsstay 26 and is tightly enclosed axially on both sides by the two slaving means 15 a and 15 b. - At a front end facing away from the
stay 26, the main body of the latchingblock 25 is provided with anaxial recess 27 which is open towards the front end of the latchingblock 25. In this way, blockingtongues 28 extending axially on both sides of therecess 27 are formed. The blockingcams 23 of the latchingring 20 are arranged such that each of said blockingcams 23 pushes against one of the blockingtongues 28, providing the dosing and activatingelement 12 does not assume the releasing position. When the latchingblock 25 moves axially, the restoring means 24 for the latchingelement 21 extends through theaxial recess 27. - Indentation recesses29 are furthermore formed in the main body of the latching
block 25, and define the releasing position of the dosing and activatingelement 12. Oneindentation recess 29 is provided for each of the blockingcams 23. The position of the indentation recesses 29 is selected such that they only overlap the blockingcams 23, and thus allow the blockingcams 23 to be inserted, when the dosing and activatingelement 12 has been advanced into its releasing position. - It is clear that in the arrangement specifically selected in the exemplary embodiment, a
single blocking cam 23 could also be provided and the latchingblock 25 accordingly comprise only oneindentation recess 29 and possibly also only one blockingtongue 28. Furthermore, the latching block could in principle be produced together with the dosing and activatingelement 12 as one piece. Forming it as a separate part, however, offers advantages with regard to production, assembly and the dosing and activatingelement 12 cooperating with thepiston rod 4. With respect to the installation length of the latchingblock 25, it should also be pointed out that the latchingblock 25 is supported, on its outer side facing away from the latchingelement 21, on an inner surface area of thecasing 11. In this way, the stability of securing the latching engagement is increased. Thecasing 11 preferably forms an axial guide for the latchingblock 25. - The functionality of the injection apparatus is described in the following, wherein it is assumed that a
new reservoir module 10 and a dosing and activatingmodule 30 which has already been used at least once are assembled and a product is then delivered for the first time. - The dosing and activating
module 30 and thenew reservoir module 10 are aligned axially with respect to each other, such that their two longitudinal axes are flush with each other. Thereservoir module 10 is then inserted via its rear end into thecasing 11, which is open to the front, of the dosing and activatingmodule 30. - This centers the
casing section casing section 11 on the tapered ends of theguide ribs 3 d of themechanism holder 3. While being slid on, the two casing sections are guided axially and linearly onto each other in a rotational angular position pre-set by the linear guide, until thecasing sections 1′ and 11 assume a connecting end position in which the latching engagement of thelatching elements 3 a and 21 can be established or can be set by itself. - The dosing and activating
element 12 is locked in pre-set rotational angular positions relative to therear casing section 11. The linear guide of thecasing sections 1′ and 11 and the rotational angular locking positions of the dosing and activatingelement 12 are adjusted to each other such that the engagement, secured against rotating, between the dosing and activatingelement 12 and thepiston rod 4 is established in every locking position of the dosing and activatingelement 12 and every rotational angular position in which thecasing sections 1′ and 11 are linearly guided onto each other. - If the dosing and activating
element 12 is situated in an axial position relative to thecasing section 11 which is behind the releasing position, the latchingelement 21 is held in its radially innermost position by the latchingblock 25. In this position of the latchingelement 21, the dosing and activatingmodule 30 and thereservoir module 10 cannot be slid onto each other up to the connecting end position and therefore also cannot be connected to each other, since the annular stay formed on the outer surface of themechanism holder 3, which forms a part of the first latching element 3 a, comes to rest abutting against thesecond latching element 21 first. - The annular stay can be reduced to a short radial protrusion in the tangential direction, if it is ensured that the
casing sections 1′ and 11 can only be assembled in the rotational angular position in which such a protrusion and thesecond latching element 21 come to rest in an axial flush. The annular stay or radial protrusion could also form the first latching element 3 a alone, since the essential function of the first latching element 3 a is to allow the connection between thereservoir module 10 and the dosing and activatingmodule 30 to be established only when the dosing and activatingelement 12 assumes its releasing position. If this condition is fulfilled, then the dosing and activatingelement 12 would ensure, when the connection between thereservoir module 10 and the dosing and activatingmodule 30 is established, that the dosage setting member 9 is situated in its dosing zero position in which it abuts thedelivery stopper 3 c of themechanism holder 3. - In order to fulfil the condition described above, the user pushes the dosing and activating
element 12 axially forwards relative to therear casing section 11 as far as the releasing position. In this relative position between therear casing section 11 and the dosing and activatingelement 12, the blockingcams 23 can be moved into the indentation recesses 29 of the latchingblock 25. The user therefore not only pushes the dosing and activatingelement 12 at least as far as the releasing position, but simultaneously also pushes thesecond latching element 21 out of latching engagement by means of theunlatching button 22. Thereservoir module 10 can then be moved axially over the annular stay of the first latching element 3 a and inserted further into therear casing section 11. The user can let go of theunlatching button 22. As soon as thesecond latching element 21 overlaps the first latching element 3 a, it snaps into the accommodating latching element 3 a due to the force of the restoring means 24, such that the latching engagement is established. Thereservoir module 10 and the dosing and activatingmodule 30 are then connected to each other in a defined way with respect to the position of the dosage setting member 9 and thepiston rod 4. If the dosage setting member 9 still exhibited a slight distance from thedelivery stopper 3 c before the latching engagement is established, this distance is eliminated due to the action of the dosing and activatingelement 12, required to establish the connection. A resultant delivery of product can be accepted and even desired, for the purpose of priming the injection needle. This preferably resets the counting and indicating means 17 to zero. - In the defined initial state brought about in this way, the user can dose the product. The product is dosed by rotating the dosing and activating
element 12 about the longitudinal axis L and relative to thecasing section 11. Since the dosing slaving means 13 is connected to the dosing and activatingelement 12, secured against rotating, and for its part engages with thepiston rod 4, secured against rotating, the dosing and activatingelement 12 slaves thepiston rod 4 during its rotational dosing movement. Due to the threaded engagement between thepiston rod 4 and the dosage setting member 9 and the linear guide of the dosage setting member 9 by themechanism holder 3, the dosage setting member 9 performs an axial, translational dosing movement, pre-set by the thread pitch of the reciprocal threaded engagement, towards the dosing and activatingelement 12. The dosing and activatingelement 12 forms a reartranslational stopper 12 c which limits the translational dosing movement of the dosage setting member 9 and thus defines the maximum delivery stroke which may be set. - The counting and indicating means17 counts the dosage units corresponding to the rotational angular position of the dosing and activating
element 12 and indicates it optically. - Once the desired product dosage has been selected, the dosing process is completed. The selected product dosage is delivered by means of the delivery movement, pointing in the advancing direction of the piston, of the dosing and activating
element 12. In the course of its delivery movement, the dosing and activatingelement 12 abuts against the dosage setting member 9 and slaves it. When the dosage setting member 9 abuts against thedelivery stopper 3 c of themechanism holder 3 in the course of the delivery movement, the delivery movements of the dosing and activatingelement 12 and the delivery of product are completed. Once the user lets go of the dosing and activatingelement 12, it is preferably moved counter to the advancing direction, back into a new initial position for dosing and delivering the product again, by the restoringmeans 16. The counting and indicatingmeans 17 is preferably coupled to the dosing and activatingelement 12 such that it has in the meantime been reset back to zero. It possibly possesses means for counting and indicating the total product amount already delivered and thus the residue product amount remaining in theampoule 2. - In order to detach the
reservoir module 10 from the dosing and activatingmodule 30, the dosing and activatingelement 12 is advanced as far as the releasing position, i.e. until it abuts against the dosage setting member 9. in this position, the user can release the latching engagement again by pushing onto theunlatching button 22, and separate thereservoir module 10 from the dosing and activatingmodule 30. - FIGS.9 to 13 shows a longitudinal section and four cross-sections of a second exemplary embodiment of an injection apparatus. The injection apparatus of the second exemplary embodiment is identical to that of the first exemplary embodiment with respect to the latch and latching
block 25, such that reference is made in this regard to the description of the first embodiment. In particular, the latchingblock 25 of the second embodiment is identical to that of the first embodiment with respect to all its functional details. The same applies to thelatching elements 3 a and 21. - The latching
ring 20 and the position of the blockingcams 23 relative to the latchingelement 21 and relative to the latchingblock 25 in the initial state of the apparatus can be seen particularly clearly in the cross-sections of FIGS. 10, 11 and 12, to which reference is made in this regard, also as representative for the first embodiment. - The injection apparatus of the second embodiment differs from the first embodiment in the engagement and the progression of movement of the components involved in dosing. Furthermore, the mechanism holder fulfils, in addition to the functions of the mechanism holder of the first embodiment, the function of positioning the dosage setting member in discrete rotational angular positions which may be changed relative to the mechanism holder, for the purpose of dosing. The blocking means of the second embodiment, by contrast, is embodied more simply than that of the first embodiment. Primarily, only the differences as compared to the first embodiment will be described in the following, wherein for components which are identical in their basic function to the components of the same name in the first embodiment but differ in details, numbers in the thirties with the same end digit, or exactly the same reference numerals as in the first embodiment, as used. Where no statements are made regarding the second embodiment, the corresponding statements regarding the first embodiment shall apply.
- In the second embodiment, the dosing and activating
element 32, which can be axially and linearly moved relative to therear casing section 11 and rotated about the longitudinal axis L, is connected to thedosage setting member 39, secured against rotating. The dosing and activatingelement 32 and thedosage setting member 39 can be moved in and counter to the advancing direction, relative to each other and relative tocasing sections 1′ and 11. Thepiston rod 4 is held by amechanism holder 3, secured against rotating. In cooperation with blocking elements of the blocking means 38, formed on themechanism holder 3 as one piece, the returning blocking means 6, which is functionally identical to the first embodiment, prevents thepiston rod 4 from moving counter to the advancing direction, but allows it to move in the advancing direction. The blocking elements simultaneously form the returning block and the rotational block for thepiston rod 4. Furthermore, as previously in the first embodiment, the dosing and activatingelement 32 forms a sliding guide for thepiston rod 4. - During dosing, the dosing and activating
element 32 performs the same rotational dosing movement as the dosing and activatingelement 12 of the first embodiment. However, since the engagement is secured against rotating, thedosage setting member 39 is slaved during the rotational dosing movement. The threaded engagement between thepiston rod 4 and thedosage setting member 39 is again comparable to that of the first embodiment, such that due to the rotational dosing movement and the threaded engagement with thepiston rod 4, astopper 39 c formed by thedosage setting member 39 is moved, in the course of dosing, counter to the advancing direction, towards a front end of the dosing and activatingelement 32. As opposed to the first embodiment, thedosage setting member 39 thus completes a rotational dosing movement and a translational dosing movement relative to the front casing section during dosing, while thepiston rod 4 remains stationary. Once dosing has been completed, the delivery movement of the dosing and activatingelement 32 advances thepiston rod 4 by the path length which corresponds to the slight distance between a stopper area of thedosage setting member 39 and thedelivery stopper 3 c of themechanism holder 3, set by the dosing. - The translational dosing movement of the
dosage setting member 39 is limited counter to the advancing direction by a reartranslational stopper 11 c which is formed directly by therear casing section 11 itself. In the second embodiment, too, the rotational and translational axis of the components involved in dosing and delivering the product forms the longitudinal axis L. - As in the first embodiment, the
front casing section 1′ forms a sliding guide for thedosage setting member 39. In order to form the sliding guide, an inner surface area of themechanism holder 3 and an outer surface area of thedosage setting member 39 are in sliding contact with each other. The dosing and activatingelement 32 engages with an inner surface area of thedosage setting member 39, to form the connection, secured against rotating, between thedosage setting member 39 and the dosing and activatingelement 32. - In the second embodiment, the
piston rod 4 comprises no braking means of its own beyond the returning blocking means 6. Rather, the front sides of the serrated teeth of the returning blocking means 6 also form the braking means on their own. Thepiston rod 4 of the second embodiment can, however, be replaced by thepiston rod 4 of the first embodiment. Accordingly, themechanism holder 3 of the second embodiment would in this case also have to form at least one braking element, preferably both braking elements, of the first embodiment. - FIGS.14 to 16 show the
mechanism holder 3 of the second embodiment in a perspective representation, a side view and in the cross-section A-A indicated in the side view. As in the first embodiment, themechanism holder 3 is embodied as a one-part sleeve part, preferably as a plastic injection molded part. It comprises a bulge 3 e on the outer surface of a front sleeve section. The front sleeve section is plugged into thereservoir part 1 and locked non-detachably, at least for the user, to thereservoir part 1 by means of the bulge 3 e. - The latching element3 a is formed on a middle sleeve section of the
mechanism holder 3, as in the first embodiment. - A rear sleeve section, connected to the latching element3 a, forms a plurality of
axial guides 3 d on its outer circumference. Theaxial guides 3 d are formed by guide ribs which protrude radially on the outer circumference of the rear sleeve section. More precisely, the axial guide formed by the axially extending, straight side walls of said guide ribs, such that—as in the first embodiment—axial guiding channels are obtained. The guide ribs protrude out from the middle sleeve section like fingers, as far as the rear end of themechanism holder 3, where they taper off axially. Theaxial guide 3 d serves to linearly guide therear casing section 11 when thereservoir module 10 is connected to the dosing and activatingmodule 30. As can be seen in FIG. 9 and most clearly in FIG. 11,engagement elements 11 d project radially inwards from the inner surface area of therear casing section 11, corresponding in number and adapted in shape. Oneengagement element 11 d protrudes into each of theaxial guides 3 d and is linearly guided by theaxial guide 3 d when thefront casing section 1′ and therear casing section 11 are slid into each other in order to be connected. In this way, it is ensured that there is no relative rotating between thefront casing section 1′ and therear casing section 11 when the engagement, secured against rotating, between the dosing and activatingelement 32 and thedosage setting member 39 is established in the course of connecting. - Since the guide ribs taper off axially at their rear ends, and the guide channels are thus widened into insertion funnels, centering between the
front casing section 1′ and therear casing section 11, for the purpose of connecting, is made easier. The guide ribs also taper off at their ends radially with respect to the surface area of themechanism holder 3, which makes centering thecasing sections 1′ and 11 into a rotational angular position pre-set by theaxial guide 3 d, relative to each other, even easier. - Just as the
front casing section 1′ and therear casing section 11 are prevented from rotating relative to each other when sliding them into each other, thedosage setting member 39 is also fixed with respect to its rotational angular position relative to thefront casing section 1′, thedosage setting member 39 being detachably fixed in order to allow the rotational movement of thedosage setting member 39 necessary for dosing. In order therefore to enable the dosing movement of thedosage setting member 39 on the one hand, but to prevent an undesired dosing movement by establishing the connection between thefront casing section 1′ and therear casing section 11, thedosage setting member 39 is fixed by themechanism holder 3 in discrete rotational angular positions, by means of a releasable locking connection. - FIGS.17 to 20 show individual representations of the
dosage setting member 39. For forming the locking connection, a number of locking recesses 39 g are formed on the outer surface area of thedosage setting member 39, distributed in regular separation over the circumference. Each of the locking recesses 39 g is formed by a straight, axially extending furrow having a rounded contour running in its cross-section. - The
mechanism holder 3 is provided with two locking projections 3 g (FIGS. 15 and 16). The two locking projections 3 g project radially inwards from an inner surface area of themechanism holder 3 in the rear sleeve section of themechanism holder 3. They are arranged diametrically opposed to each other. The respective surface region of themechanism holder 3, on which one of the locking projections 3 g is formed, forms aspring element 3 f which is elastically flexible in the radially direction. Due to the elastic flexibility and the rounded shape of the locking projections 3 g, in conjunction with the rounded profile of the locking recesses 39 g, the locking engagement between the locking projections 3 g and the opposing locking recesses 39 g may be released. This is necessary for selecting the dosage. On the other hand, the locking engagement is however designed such that thedosage setting member 39 is rotationally angularly fixed sufficiently stable that there cannot be any undesired dosing movement of thedosage setting member 39 when thefront casing section 1′ and therear casing section 11 are connected, when the rotational coupling between the dosing and activatingelement 32 and thedosage setting member 39 is established. The locking connection between themechanism holder 3 and thedosage setting member 39 has the advantageous side effect of a tactile signal during dosing. In order to maintain the favorable elasticity of thespring element 3 f, the rear sleeve section of themechanism holder 3 is cut away in the surface region in question, such that thespring element 3 f is maintained as an annular segment extending in the circumferential direction which is axially free on both sides. - Axial guides39 d for the engagement, secured against rotating, between the
dosage setting member 39 and the dosing and activatingelement 32 may likewise be seen in FIGS. 17, 18 and 20. The dosing and activatingelement 32 is provided with at least one engagement element, in order to obtain the axial linear guide, i.e. the rotational block, between the dosing and activatingelement 32 and thedosage setting member 39. The axial guides 39 d are again guide channels formed by a number of guide ribs extending axially in a straight line. Each of the guide ribs tapers off axially and radially at its rear end facing the dosing and activatingelement 32, in order to make centering between the dosing and activatingelement 32 and thedosage setting member 39 easier, when the engagement, secured against rotating, is established. The same design is therefore used for the axial linear guide of thedosage setting member 39 and the dosing and activatingelement 32 as for the axial linear guide of thecasing sections 1′ and 11. - For the sake of completeness, reference is also made to the
dosing thread 39 a and thedelivery stopper 39 c of thedosage setting member 39, which can most clearly be seen in FIG. 18. - Two rotational blocks are provided for the
dosage setting member 39 which are active in the two axial end positions of thedosage setting member 39. Reference is additionally made in this regard to FIG. 22. - In order to prevent the possibility of the
piston rod 4 being moved back in response to a rotational dosing movement by thedosage setting member 39,rotational stoppers 39 h are formed at a front end of thedosage setting member 39. In the front position, which thedosage setting member 39 assumes directly after the product is delivered or before the dosage is selected, therotational stoppers 39 h engage with rotational counter stoppers 3 h formed on the mechanism holder 3 (FIG. 16). Therotational stoppers 39 h axially project from a front abutting side of thedosage setting member 39, and the rotational counter stoppers 3 h protrude from an axially facing abutting area of themechanism holder 3 forming thedelivery stopper 3 c, axially opposed to therotational stoppers 39 h. The engagement between therotational stoppers 39 h and the rotational counter stoppers 3 h is such that it allows a rotational dosing movement in a rotational direction, which causes a translational dosing movement of thedosage setting member 39 directed away from thedelivery stopper 3 c, but prevents a rotational dosing movement in the opposite rotational direction, in the front axial end position. - Furthermore, another pair of rotational stoppers and rotational counter stoppers is provided, which are formed and cooperate in basically the same way as the
stoppers 3 h and 39 h. Said second pair of rotational stoppers arerotational stoppers 39 i on the one hand, which axially project from a rear abutting area of thedosage setting member 39, androtational counter stoppers 11 i on the other, which axially protrude from the facing stopper abutting area of the reartranslational stopper 11 c towards thedosage setting member 39, which however cannot be seen in FIG. 9 due to their small dimensions. In the rear end position, the rear pair ofrotational stoppers 11 i/39 i prevents the possibility of thepiston rod 4 being moved in the advancing direction in response to a dosing movement by thedosage setting member 39, directed against the reartranslational stopper 11 c. - The height, i.e., the axial length, of all the
rotational stoppers piston rod 4 and thedosage setting member 39. The rotational stoppers are axially sufficiently short that the rotational dosing movement which moves thedosage setting member 39 away from the respectivetranslational stopper - When assembling the components of the
reservoir module 10, thedosage setting member 39 is screwed onto thepiston rod 4 as far as a pre-set axial position, as may be seen from FIG. 9. Thepiston rod 4, together with the screwed-ondosage setting member 39, is then inserted into themechanism holder 3 from behind, until its blocking means 38 comes into blocking engagement with the returning blocking means 6 of thepiston rod 4 and furthermore the engagement, secured against rotating, between therotational stoppers 39 h of thedosage setting member 39 and rotational counter stoppers of themechanism holder 3 is established. Even while being inserted into themechanism holder 3, thedosage setting member 39 is axially and linearly guided by themechanism holder 3 via the locking engagement between the locking projections 3 g and the locking recesses 39 g, until thedosage setting member 39 abuts thedelivery stopper 3 c of themechanism holder 3. In this front end position of thedosage setting member 39 relative to themechanism holder 3, the engagement, secured against rotating, between therotational stoppers 3 h and 39 h has also already been established. - In this state, the
mechanism holder 3 and areservoir part 1, already fitted with a reservoir, are connected to each other. - In a following step, the
rear casing section 11 of the completely assembled dosing and activatingmodule 30 is slid onto themechanism holder 3, wherein themechanism holder 3 and therear casing section 11 can be centered with respect to each other due to theaxial guides 3 d and theengagement elements 11 d of therear casing section 11 and, once centered, are axially and linearly guided onto each other due to the guide engagement. In the course of sliding therear casing section 11 onto themechanism holder 3, the dosing and activatingelement 32 comes into engagement, secured against rotating, with thedosage setting member 39, wherein here too a certain centering is also possible first, using a linear guide corresponding to theaxial guides 3 d and theengagement elements 11 d. - The dosing and activating
element 32 is in locking engagement with the rear casing section in discrete rotational angular locking positions and in the locking engagement, i.e., in the respective rotational angular locking position, is axially and linearly guided. The rotational angular difference between two consecutive rotational angular locking positions corresponds to one dosage unit. The linear guide between themechanism holder 3 and therear casing section 11 on the one hand, and the discrete rotational angular positions of thedosage setting member 39 relative to the mechanism holder 3 (locking projections 3 g and lockingrecesses 39 g) and the rotational angular locking positions of the dosing and activatingelement 32 relative to therear casing section 11 on the other, are adjusted to each other such that the twocasing sections 1′ and 11 are always slid linearly over each other in a rotational angular position such that thedosage setting member 39 and the dosing and activatingelement 32 are also aligned relative to each other for their engagement, secured against rotating, such that there is no relative rotating between the components involved in dosing while thereservoir module 10 is connected to the dosing and activatingmodule 30. - With respect to the other details of assembling, in particular of establishing the latching engagement, and of the functionality of the injection apparatus in accordance with the second embodiment, reference is made to the description of first embodiment.
- Rotational blocks can also be provided in the injection apparatus in accordance with the first embodiment, which prevent undesired response movements by the
piston rod 4 in the two axial end positions of the dosage setting member 9 of the first embodiment. FIG. 21 shows the two rotational blocks, which are formed in the same way as the rotational blocks of the second embodiment. However, the rotational counter stoppers which in the second embodiment are formed on thecasing sections 1′ and 11 are formed in the first embodiment by the blocking means 8 on the one hand and the dosing and activatingelement 12 on the other. Thus, a number ofrotational stoppers 8 h are formed on the abutting side of the blocking means 8 axially facing the dosage setting member 9 and axially protrude towards the dosage setting member 9. Since the blocking means 8 is axially and immovably mounted by thefront casing section 1′ and connected, secured against rotating, to thepiston rod 4, a rotational block for the rotational dosing movement between thepiston rod 4 and the dosage setting member 9 is also obtained, via the front pair ofrotational stoppers 8 h/9 h. The second pair of rotational stoppers is formed between the dosage setting member 9 and the reartranslational stopper 12 c. As in the second embodiment, a number ofrotational stoppers 12 i protrude axially towards the dosage setting member 9 from the abutting area of thetranslational stopper 12 c axially facing the dosage setting member 9. As in the second embodiment, the dosage setting member 9 is provided on its rear side with rotational stoppers 9 i which in the rear axial end position of the dosage setting member 9 engage with therotational stoppers 12 i. In the rear axial end position of the dosage setting member 9, the rear pair of rotational stoppers 9 i/12 i only allows the rotational dosing movement which causes a translational dosing movement of the dosage setting member 9 in the advancing direction. - In the foregoing description, embodiments of the present invention, including preferred embodiments, have been presented for the purpose of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiments were chosen and described to provide the best illustration of the principals of the invention and its practical application, and to enable one of ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth they are fairly, legally, and equitably entitled.
Claims (38)
1. An administering apparatus for administering, in doses, a product which can be administered, said apparatus comprising:
a) a front casing section, comprising a reservoir for said product;
b) a rear casing section;
c) a driven member, mounted by at least one of said casing sections, for performing a delivery movement which delivers a selected product dosage;
d) a dosage setting member which performs a dosing movement relative to said driven member in order to select said product dosage; and
e) a dosing and drive device which can be moved rotationally about a rotational axis and translationally, relative to the front casing section, and when establishing a connection between the casing sections, is coupled to the driven member and said dosage setting member, such that a rotational movement of said dosing and drive device causes the dosing movement of the dosage setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member; wherein
f) at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections, which form a linear guide when establishing a connection between the casing sections, such that the casing sections are slid onto each other as far as a connecting end position, such that they cannot rotate relative to each other about said rotational axis.
2. The administering apparatus as set forth in claim 1 , wherein the at least one axial guide is formed on a surface area of one of the casing sections.
3. The administering apparatus as set forth in claim 2 , wherein a number of axial guides are formed on said surface area of one of the casing sections, spaced from each other in the circumferential direction.
4. The administering apparatus as set forth in claim 1 , wherein said at least one engagement element is formed on a surface area of the other of the casing sections.
5. The administering apparatus as set forth in claim 1 , wherein the at least one axial guide is tapered in the axial direction, at an end facing the other of the casing sections, in order to make aligning the casing sections easier.
6. The administering apparatus as set forth in claim 5 , wherein the at least one axial guide is also tapered in the radial direction.
7. The administering apparatus as set forth in claim 1 , wherein the at least one engagement element is tapered in the axial direction, at an end facing one of the casing sections, in order to make aligning the casing sections easier.
8. The administering apparatus as set forth in claim 7 , wherein the at least one engagement element is also tapered in the radial direction.
9. The administering apparatus as set forth in claim 1 , wherein the casing sections can be slid onto each other in a single rotational angular position or in a number of discretely pre-set single rotational angular positions.
10. The administering apparatus as set forth in claim 10 , wherein the at least one axial guide guides the casing sections axially and linearly with respect to each other in each of the number of pre-set rotational angular positions.
11. The administering apparatus as set forth in claim 9 , wherein the at least one axial guide prevents the casing sections from being able to be slid onto each other in a rotational angular position other than the single rotational angular position or the number of pre-set rotational angular positions.
12. The administering apparatus as set forth in claim 1 , wherein the dosage setting member is axially and linearly guided by one of the casing.
13. The administering apparatus as set forth in claim 1 , wherein the dosage setting member detachably engages with one of the casing sections in pre-set rotational angular positions.
14. The administering apparatus as set forth in claim 13 , wherein the dosage setting member, when engaged, is axially and linearly guided.
15. The administering apparatus as set forth in claim 14 , wherein the engagement is a locking engagement.
16. The administering apparatus as set forth in claim 15 , wherein said detachable engagement is a locking engagement, wherein at least one locking projection and at least one locking recess, one of which is formed on the dosage setting member and the other on one of the casing sections, are in locking engagement with each other and can be moved out of locking engagement against a restoring elasticity force.
17. The administering apparatus as set forth in claim 1 , wherein the dosage setting member comprises at least one stopper which in a dosing end position of the dosage setting member is in blocking engagement with one of the casing sections, said blocking engagement preventing a movement of the dosage setting member which could cause an axial response movement by the driven member.
18. The administering apparatus as set forth in claim 1 , wherein the front casing section comprises a first latching element and the rear casing section comprises a second latching element and the latching elements axially fix the casing sections onto each other in a latching engagement.
19. The administering apparatus as set forth in claim 1 , wherein the dosing movement of the dosage setting member is or comprises a translational movement pointing in the direction of the rotational axis of the dosing and drive device.
20. The administering apparatus as set forth in claim 1 , wherein a rotational movement which the driven member and the dosage setting member perform relative to each other or jointly relative to at least one of the casing sections causes the dosing movement of the dosage setting member.
21. The administering apparatus as set forth in claim 1 , wherein the driven member and the dosage setting member are in threaded engagement with each other about a threaded longitudinal axis pointing in the direction of the rotational axis of the dosing and drive device.
22. The administering apparatus as set forth in claim 1 , wherein one of a cannula of at most 30 gauge or a cannula exhibiting a combination of outer and inner diameter not specified in ISO 9626, having an outer diameter of 320 μm at most and as thin a wall thickness as possible, forms an injection or infusion cannula of the administering apparatus.
23. The administering apparatus as set forth in claim 22 , wherein said cannula is one of a 31 or 32 gauge cannula.
24. A reservoir module for an administering apparatus, said reservoir module comprising:
a) a front casing section of said administering apparatus, which comprises a reservoir for a product which can be delivered;
b) a piston which is accommodated in said reservoir such that it can be moved in an advancing direction towards an outlet of the reservoir, in order to deliver product;
c) a dosage setting member which is accommodated by said front casing section such that it can be moved, in order to perform a dosing movement and a delivery movement;
d) and a piston rod which is connected to said dosage setting member and held by the front casing section such that said piston rod is prevented from moving counter to said advancing direction and said dosing movement does not cause the piston rod to move in the advancing direction;
e) wherein at least one axial guide or at least one engagement element is formed on a surface area of the front casing section, to form a linear guide, in order—when establishing a connection between the casing sections—to slide the front casing section and a rear casing section of the administering apparatus, secured against rotating, onto each other as far as a connecting end position.
25. The reservoir module as set forth in claim 24 , wherein said administering apparatus comprises:
a) a front casing section, comprising a reservoir for said product;
b) a rear casing section;
c) a driven member, mounted by at least one of said casing sections, for performing a delivery movement which delivers a selected product dosage;
d) a dosage setting member which performs a dosing movement relative to said driven member in order to select said product dosage; and
e) a dosing and drive device which can be moved rotationally about a rotational axis and translationally, relative to the front casing section, and when establishing a connection between the casing sections, is coupled to the driven member and said dosage setting member, such that a rotational movement of said dosing and drive device causes the dosing movement of the dosage setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member; wherein
f) at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections, which form a linear guide when establishing a connection between the casing sections, such that the casing sections are slid onto each other as far as a connecting end position, such that they cannot rotate relative to each other about said rotational axis.
26. The reservoir module as set forth in claim 24 , wherein the dosage setting member detachably engages with the front casing section in pre-set rotational angular positions.
27. The reservoir module as set forth in claim 26 , wherein the dosage setting member, when engaged, is axially and linearly guided.
28. The reservoir module as set forth in claim 27 , wherein the engagement is a locking engagement.
29. The reservoir module as set forth in claim 26 , wherein said detachable engagement is a locking engagement, wherein at least one locking projection and at least one locking recess, one of which is formed on the front casing section and the other on the dosage setting member, are in locking engagement with each other and can be moved out of locking engagement against a restoring elasticity force.
30. The reservoir module as set forth in claim 24 , wherein the front casing section and the dosage setting member each comprise at least one stopper and, in a front dosing end position of the dosage setting member, these stoppers engage, in order to preventing a movement of the dosage setting member which could cause a response movement by the piston rod counter to the advancing direction.
31. The reservoir module as set forth in claim 24 , wherein the front casing section comprises a sleeve-shaped reservoir part comprising the reservoir and a sleeve-shaped mechanism holder, which are produced separately, and wherein said mechanism holder holds the piston rod.
32. The reservoir module as set forth in claim 31 , wherein said sleeve-shaped reservoir part and said sleeve-shaped mechanism holder are connected to each other such that a user cannot release the connection without destroying it
33. The reservoir module as set forth in claim 31 , wherein the mechanism holder forms a delivery stopper for the dosage setting member, in order to limit the delivery movement, and wherein the dosing movement moves the dosage setting member counter to the advancing direction, away from said delivery stopper.
34. The reservoir module as set forth in claim 31 , wherein the mechanism holder comprises a blocking means, and said blocking means and the piston rod are in a securing engagement, said securing engagement preventing the piston rod from being returned to a position which it assumed before performing a movement in the advancing direction, and wherein the securing engagement is not releasable.
35. The reservoir module as set forth in claim 24 , wherein the reservoir module is a disposable module which is provided to be exchanged in its entirety once the reservoir has been emptied.
36. An administering apparatus as set forth in claim 1 , and at least one reservoir module comprising:
a) a front casing section of said administering apparatus, which comprises a reservoir for a product which can be delivered;
b) a piston which is accommodated in said reservoir such that it can be moved in an advancing direction towards an outlet of the reservoir, in order to deliver product;
c) a dosage setting member which is accommodated by said front casing section such that it can be moved, in order to perform a dosing movement and a delivery movement;
d) and a piston rod which is connected to said dosage setting member and held by the front casing section such that said piston rod is prevented from moving counter to said advancing direction and said dosing movement does not cause the piston rod to move in the advancing direction;
e) wherein at least one axial guide or at least one engagement element is formed on a surface area of the front casing section, to form a linear guide, in order—when establishing a connection between the casing sections—to slide the front casing section and a rear casing section of the administering apparatus, secured against rotating, onto each other as far as a connecting end position, wherein said reservoir module is provided as an exchange module for a reservoir module forming a part of said administering apparatus.
37. A dispensing apparatus comprising:
a front casing section;
a rear casing section connectable to said front casing section; wherein
at least one guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections, said at least one guide and at least one engagement element cooperating when establishing a connection between the casing sections such that the casing sections are slid relative to each other as far as a connecting end position and such that they cannot rotate relative to each other.
38. An administering apparatus comprising a front casing section, a rear casing section connectable to the front casing section, a driven member carried by at least one of said casing sections for performing a delivery movement, a dose setting member for performing a dosing movement relative to the driven member to select said product dosage, and a dosing and drive device moveable rotationally about a rotational axis and translationally relative to the front casing section, wherein, when connecting the casing sections, the dosing and drive device is coupled to the driven member and the dose setting member such that a rotational movement of the dosing and drive device causes the dosing movement of the dose setting member and a translation movement of the dosing and drive device causes the delivery movement of the driven member, wherein at least one axial guide is formed on one of the casing sections and at least one engagement element is formed on the other of the casing sections such that when connecting the casing sections, the casing sections are slid onto each other as far as a connecting end position and cannot rotate relative to each other.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20112501U DE20112501U1 (en) | 2001-07-30 | 2001-07-30 | Locking lock for connecting housing parts of an injection or infusion device |
DE20112501.3 | 2001-07-30 | ||
DE10163329.7 | 2001-12-21 | ||
DE10163328A DE10163328B4 (en) | 2001-07-30 | 2001-12-21 | Administration device with anti-rotation device |
DE10163329A DE10163329A1 (en) | 2001-07-30 | 2001-12-21 | Connection of housing sections of an administration device for the metered administration of a dispensable product |
PCT/CH2002/000412 WO2003011373A1 (en) | 2001-07-30 | 2002-07-22 | Connection of housing sections of an administration device for dosed administration of a distributable product |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CH2002/000412 Continuation WO2003011373A1 (en) | 2001-07-30 | 2002-07-22 | Connection of housing sections of an administration device for dosed administration of a distributable product |
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US20040186441A1 true US20040186441A1 (en) | 2004-09-23 |
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Application Number | Title | Priority Date | Filing Date |
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US10/767,737 Abandoned US20040186441A1 (en) | 2001-07-30 | 2004-01-29 | Connecting casing sections of an administering apparatus for administering, in doses, a product which can be delivered |
US10/767,837 Expired - Fee Related US7309327B2 (en) | 2001-07-30 | 2004-01-29 | Administering apparatus comprising a rotational block |
US11/752,081 Expired - Fee Related US8568366B2 (en) | 2001-07-30 | 2007-05-22 | Reservoir module for an administering apparatus |
US11/752,393 Expired - Fee Related US8545456B2 (en) | 2001-07-30 | 2007-05-23 | Administering apparatus comprising a rotational block |
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Application Number | Title | Priority Date | Filing Date |
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US10/767,837 Expired - Fee Related US7309327B2 (en) | 2001-07-30 | 2004-01-29 | Administering apparatus comprising a rotational block |
US11/752,081 Expired - Fee Related US8568366B2 (en) | 2001-07-30 | 2007-05-22 | Reservoir module for an administering apparatus |
US11/752,393 Expired - Fee Related US8545456B2 (en) | 2001-07-30 | 2007-05-23 | Administering apparatus comprising a rotational block |
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EP (2) | EP1416983B1 (en) |
JP (2) | JP4041462B2 (en) |
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AT (2) | ATE337809T1 (en) |
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US20040186431A1 (en) * | 2001-07-30 | 2004-09-23 | Roney Graf | Administering apparatus comprising a dosing device |
US20040186442A1 (en) * | 2001-07-30 | 2004-09-23 | Roney Graf | Reservoir module comprising a piston rod |
US20040215153A1 (en) * | 2001-07-30 | 2004-10-28 | Roney Graf | Latching block for connecting casing sections of an administering apparatus |
US20040215152A1 (en) * | 2001-07-30 | 2004-10-28 | Fritz Kirchhofer | Administering apparatus comprising a rotational block |
US20060258988A1 (en) * | 2003-11-03 | 2006-11-16 | Joachim Keitel | Injection device |
US20080071226A1 (en) * | 2006-01-17 | 2008-03-20 | Ulrich Moser | Extractable Dose Setting Knob |
US20080119796A1 (en) * | 2001-07-30 | 2008-05-22 | Tecpharma Licensing Ag | Reservoir module comprising a piston rod |
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US20090054846A1 (en) * | 2006-01-17 | 2009-02-26 | Ulrich Moser | Injection device with secured dosing button |
US20090054850A1 (en) * | 2006-01-17 | 2009-02-26 | Ulrich Moser | Pusher with a coupling element |
WO2009062687A1 (en) * | 2007-11-12 | 2009-05-22 | Tecpharma Licensing Ag | Rotatable guiding sleeve comprising an overload-protected spring |
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US20100168677A1 (en) * | 2007-05-25 | 2010-07-01 | Jochen Gabriel | Injection device |
US7828779B2 (en) | 2001-12-21 | 2010-11-09 | Tecpharma Licensing Ag | Injection apparatus with an end position-blocked dosage setting member |
US20110092905A1 (en) * | 2009-10-16 | 2011-04-21 | Owen Mumford Limited | Injector apparatus |
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