US3728184A - Method of making syringe and needle adapter assembly by ultrasonic bonding - Google Patents

Method of making syringe and needle adapter assembly by ultrasonic bonding Download PDF

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Publication number
US3728184A
US3728184A US00175310A US3728184DA US3728184A US 3728184 A US3728184 A US 3728184A US 00175310 A US00175310 A US 00175310A US 3728184D A US3728184D A US 3728184DA US 3728184 A US3728184 A US 3728184A
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United States
Prior art keywords
adapter
syringe
needle
needle adapter
syringe barrel
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US00175310A
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G Burke
K Raines
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Burron Medical Products Inc
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Burron Medical Products Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0672—Spin welding
    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7844—Holding or clamping means for handling purposes cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • 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
    • A61M2205/60—General characteristics of the apparatus with identification means
    • A61M2205/6063—Optical identification systems
    • A61M2205/6081—Colour codes
    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B29L2031/7544—Injection needles, syringes

Definitions

  • the present invention relates to a syringe as used in the medical field and wherein the syringe, is to be connected with a hypodermic needle having conventional attaching flanges thereon.
  • Syringes are generally provided with a boss extending from the end thereof having a Luer taper on the outer surface thereof for receiving the hub portion of a hypodermic needle having a cooperating taper formed therein. It is additionally desirable to provide threaded adapter means cooperating with the attaching flanges on the hypodermic needle for holding the hypodermic needle in place on the boss of the syringe.
  • the threaded adapter means can be molded on the syringe itself. It is not, however, feasible to mold such threaded adapter means on smaller syringes of reduced diameter.
  • the present invention is particularly directed to a syringe and adapter assembly wherein both the syringe and adapter are formed of plastic and comprise a throwaway item which is manufactured in an economical manner so as to reduce the cost to a minimum. It is, accordingly, a particular objective of the present invention to provide a syringe and needle adapter assembly as well as a method of making same wherein the assembly can be manufactured at a minimum cost.
  • FIG. 1 is an elevation, partly broken away, of a syringe and needle adapter assembly according to the present invention
  • the needle adapter of the present invention is of tubular construction and is disposed in surrounding relationship to a boss extending longitudinally of the syringe barre].
  • This adapter includes attaching portions therein which cooperate with the flanges on an assoeiated hypodermic needle to hold the needle in place.
  • the needle adapter includes a plurality of spaced tapered portions extending therefrom which are connected to spaced portions of an annular shoulder formed on the syringe in surrounding relationship to a boss extending therefrom. These spaced portions of the needle adapter are fused to the syringe so as to firmly and positively hold the needle adapter in operative position.
  • the needle adapter is secured to the syringe barrel by ultrasonically heating and fusing the spaced projecting portions on the needle adapter to the syringe barrel while simultaneously applying pressure to the needle adapter to urge the projecting portions thereof into contact with the syringe barrel.
  • FIG. 4 is a top perspective view of the needle adapter according to the present invention.
  • I FIGQS schematically illustrates the manner in which the needle adapter is connected to the syringe'according to the method of the present invention.
  • a syringe includes a main body portion or barrel 10 of substantially cylindrical hollow construction.
  • This barrel is formed of polypropylene or similar material which may be transparent and provided with indicia thereon in the usual manner.
  • a radially extending flange 12 is provided circumferentially about the open end of the barrel.
  • a plunger 14 of sub stantially cylindrical hollow construction is slidably disposed within the barrel and has an enlarged end por' tionl6 adapted to be manually engaged by the thumb for operating the plunger in the usual manner.
  • the barrel includes an end wall 20 which is interconnected with a longitudinally extending boss 22 through the intermediary of a frangible portion 24 which may be of a construction similar to that shown in 11.8. Pat. No. 3,306,291, which permits the boss and a needlemounted thereon to be broken away from the barrel after the assembly has been used.
  • the boss is provided with a tapered outer surface 26having a conventional Luer taper.
  • a bore 28 extends longitudinally through the boss.
  • the end of the barrel defines an annular shoulder 30 extending around boss 22.
  • the needle adapter of the present invention is indicated by reference numeral 40 and may be formed of a material similar to the syringe, such as polypropylene and the like.
  • the needle adapter includes a generally cylindrical body portion 42 having an open end 44 and is provided with a pair of attaching portions 46 defining a double thread within the bore of the needle adapter.
  • Each of attaching portions 46 extends through an arc of approximately l and is sloped so as to define a substantially helical configuration. These attaching portions cooperate with the attaching flanges on the hub of a hypodermic needle so as to draw the hub of a needle into operative position when the needle is rotated with respect to the needle adapter.
  • the opposite end of the needle adapter is provided with an annular radially inwardly extending flange 48 having a central hole 49 formed therethrough which receives the boss on the syringe.
  • a plurality of spaced portions 50 extend from flange 48, these portions 50 being shown as three in number. It should be understood that the number of projecting portions can be increased, although it is considered preferable to have only three or four such projections so as to minimize the amount of area on the syringe to which the needle adapter is connected.
  • Projections 50 are of tapered configuration terminating in an outer relatively sharp edge for a purpose hereinafter described.
  • An ultrasonic heating means is indicated schematically by reference character 60, and members 62 are adapted to engage the inner face of flange 48 of the needle adapter for applying pressure thereto.
  • the needle adapter When it is desired to connect the needle adapter to the syringe, the needle adapter is first disposed in the position shown in FIG. 5 in surrounding relationship to the boss formed on the syringe.
  • the ultrasonic heating means is then disposed so as to ultrasonically heat the assembly while simultaneously applying pressure to the left as seen in FIG. 5 so as to urge the needle adapter into contact with the syringe.
  • the tapered projecting portions 50 formed on the needle adapter will serve as energy directors so as to concentrate the ultrasonic energy and the heat produced at the outer edges of these projections, thereby causing the projections to be fused to the adjacent portions of the annular shoulder formed on the barrel of the syringe.
  • pressure is applied to the needle adapter causing the projecting portions to be somewhat flattened at the outer tapered edges thereof, thereby reducing the longitudinal dimension of these projecting portions substantially in half in the completed assembly as seen, for example, in FIGS. 1 and 2.
  • the needle adapter is, accordingly, ultrasonically heated and fused only to spaced portions of the annular shoulder on the barrel in the final configuration of the assembly. It is desirable to provide areas of connection between the needle adapter and the syringe of relatively small dimensions so that such areas comprise a minor portion of the area of the annular shoulder. This insures that the annular shoulder on the syringe and the adjacent frangible portion 24 are not deformed during the method of making the assembly and, furthermore, by providing only spaced areas of interconnection between the syringe and the needle adapter, the frangible portion is not reinforced to any substantial degree so that this frangible portion cari still be readily broken after the assembly has been used.
  • needle adapter has been disclosed as being heat fused to the syringe, it should be understood that the needle adapter could also be connected at spaced portions thereof to the syringe by an adhesive substance or the like.
  • the adapter can, of course, be color coded by molding the adapter of different colored plastic, the color used corresponding to a particular size needle attached to the syringe.
  • a hypodermic needle includes a cannula 63 interconnected with a hub portion 64 having an internal bore complementary to the outer surface of boss 28 on the syringe.
  • the hub portion includes a pair of radially outwardly diametrically oppositely disposed attaching flanges 65 which cooperate with the attaching portions of the needle adapter to draw the hypodermic needle into operative position and hold the needle on the boss of the syringe.
  • a conventional needle guard fits snugly about the hub portion of the needle so as to protect the outer sharpened end portion of the cannula until the syringe is to be used.
  • the method of joining a tubular plastic needle adapter'to an annular, axially facing shoulder on a plastic syringe barrel to form a syringe and needle adapter assembly including the steps of forming at least three equally circumferentially spaced apart, tapered, rearwardly axially projecting, radially extending energy directing ribs on the needle adapter, positioning the adapter with the ribs in-engagement with the annular shoulder on the syringe barrel, and applying ultrasonic energy to the adapter and syringe barrel to ultrasonically heat and fuse the adapter to the syringe barrel at only the energy directing ribs, said 111- trasonic energy deforming said ribs and reducing the axially projecting dimension thereof by approximately one half, so that the adapter and syringe barrel are not deformed during assembly thereof and so that the adapter is spaced from said syringe barrel over a major portion thereof and may be readily broken from the syringe barrel when desired.

Abstract

A needle adapter is supported in surrounding relationship to the boss on a syringe and has attaching portions to mount a hypodermic needle having attaching flanges on the hub thereof. The needle adapter includes a plurality of tapered spaced portions which are ultrasonically fused to spaced portions of the annular shoulder on the barrel of the syringe surrounding a boss extending therefrom.

Description

United States Patent 1 1 3,728,184
Burke et al. Apr. 17, 1973 54] METHOD OF MAKING SYRINGE AND 3,224,916 12/1965 Soloff et al. ..l56/73 BY OTHER PUBLICATIONS Designing Plastic Parts for Ultrasonic Assembly, Machine Design, March 16, 1967.
Primary ExaminerDouglas J. Drummond Attorney-Luke A. Mattare et al.
57 ABSTRACT A needle adapter is supported in surrounding relation- A 2 Claims, 5 Drawing Figures [75] Inventors: George K. Burke, Kenneth Raines,
both of Bethlehem, Pa.
[73 Assignee: Burron Medical Products, Inc.,
Bethlehem, Pa.
[22] Filed: Aug. 26, 1971 21 Appl. No.: 175,310
Related US. Application Data [62] Division of Ser. No. 32,789, April 29, 1970, Pat, No.
[52] US. Cl ..1S6/73 [51] Int. Cl ..B29c 27/08 [58] Field of Search ..l56/73 [56] References Cited UNITED STATES PATENTS 3,047,942 8/1962 Schneideret a1 ...l56/73 1' I -2 f 2 2 24 4 2a 22 I mvgmons GEORGE K.BURKE& KENNETH RAINES ATTORNEYS METHOD OF MAKING SYRINGE AND NEEDLE ADAPTER ASSEMBLY BY ULTRASONIC BONDING This application is a divisional application of copending application Ser. No. 32,789, filed Apr. 29, 1970, now US. Pat. No. 3,638,650 entitled SYRINGE AND NEEDLE ADAPTER ASSEMBLY AND METHOD OF MAKING SAME.
BACKGROUND OF THE INVENTION The present invention relates to a syringe as used in the medical field and wherein the syringe, is to be connected with a hypodermic needle having conventional attaching flanges thereon.
Syringes are generally provided with a boss extending from the end thereof having a Luer taper on the outer surface thereof for receiving the hub portion of a hypodermic needle having a cooperating taper formed therein. It is additionally desirable to provide threaded adapter means cooperating with the attaching flanges on the hypodermic needle for holding the hypodermic needle in place on the boss of the syringe.
On relatively large syringes, the threaded adapter means can be molded on the syringe itself. It is not, however, feasible to mold such threaded adapter means on smaller syringes of reduced diameter.
The present invention is particularly directed to a syringe and adapter assembly wherein both the syringe and adapter are formed of plastic and comprise a throwaway item which is manufactured in an economical manner so as to reduce the cost to a minimum. It is, accordingly, a particular objective of the present invention to provide a syringe and needle adapter assembly as well as a method of making same wherein the assembly can be manufactured at a minimum cost. The
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevation, partly broken away, of a syringe and needle adapter assembly according to the present invention;
completed product provides an assembly wherein the needle adapter is positively held in operative position in use and cannot work loose with respect to the associated syringe.
SUMMARY OF THE INVENTION The needle adapter of the present invention is of tubular construction and is disposed in surrounding relationship to a boss extending longitudinally of the syringe barre]. This adapter includes attaching portions therein which cooperate with the flanges on an assoeiated hypodermic needle to hold the needle in place.
The needle adapter includes a plurality of spaced tapered portions extending therefrom which are connected to spaced portions of an annular shoulder formed on the syringe in surrounding relationship to a boss extending therefrom. These spaced portions of the needle adapter are fused to the syringe so as to firmly and positively hold the needle adapter in operative position.
In the method of the present invention, the needle adapter is secured to the syringe barrel by ultrasonically heating and fusing the spaced projecting portions on the needle adapter to the syringe barrel while simultaneously applying pressure to the needle adapter to urge the projecting portions thereof into contact with the syringe barrel.
FIG. 4 is a top perspective view of the needle adapter according to the present invention; and I FIGQS schematically illustrates the manner in which the needle adapter is connected to the syringe'according to the method of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings wherein like reference characters designate corresponding parts throughout the several views, a syringe includes a main body portion or barrel 10 of substantially cylindrical hollow construction. This barrel is formed of polypropylene or similar material which may be transparent and provided with indicia thereon in the usual manner. A radially extending flange 12 is provided circumferentially about the open end of the barrel. A plunger 14 of sub stantially cylindrical hollow construction is slidably disposed within the barrel and has an enlarged end por' tionl6 adapted to be manually engaged by the thumb for operating the plunger in the usual manner.
As seen in FIG. 2, the barrel includes an end wall 20 which is interconnected with a longitudinally extending boss 22 through the intermediary of a frangible portion 24 which may be of a construction similar to that shown in 11.8. Pat. No. 3,306,291, which permits the boss and a needlemounted thereon to be broken away from the barrel after the assembly has been used. The boss is provided with a tapered outer surface 26having a conventional Luer taper. A bore 28 extends longitudinally through the boss. The end of the barrel defines an annular shoulder 30 extending around boss 22.
The needle adapter of the present invention is indicated by reference numeral 40 and may be formed of a material similar to the syringe, such as polypropylene and the like. The needle adapter includes a generally cylindrical body portion 42 having an open end 44 and is provided with a pair of attaching portions 46 defining a double thread within the bore of the needle adapter. Each of attaching portions 46 extends through an arc of approximately l and is sloped so as to define a substantially helical configuration. These attaching portions cooperate with the attaching flanges on the hub of a hypodermic needle so as to draw the hub of a needle into operative position when the needle is rotated with respect to the needle adapter.
The opposite end of the needle adapter is provided with an annular radially inwardly extending flange 48 having a central hole 49 formed therethrough which receives the boss on the syringe. A plurality of spaced portions 50 extend from flange 48, these portions 50 being shown as three in number. It should be understood that the number of projecting portions can be increased, although it is considered preferable to have only three or four such projections so as to minimize the amount of area on the syringe to which the needle adapter is connected. Projections 50 are of tapered configuration terminating in an outer relatively sharp edge for a purpose hereinafter described.
Referring now to FIG. 5, the manner in which the needle adapter is connected to the syringe is illustrated. An ultrasonic heating means is indicated schematically by reference character 60, and members 62 are adapted to engage the inner face of flange 48 of the needle adapter for applying pressure thereto.
When it is desired to connect the needle adapter to the syringe, the needle adapter is first disposed in the position shown in FIG. 5 in surrounding relationship to the boss formed on the syringe. The ultrasonic heating means is then disposed so as to ultrasonically heat the assembly while simultaneously applying pressure to the left as seen in FIG. 5 so as to urge the needle adapter into contact with the syringe.
The tapered projecting portions 50 formed on the needle adapter will serve as energy directors so as to concentrate the ultrasonic energy and the heat produced at the outer edges of these projections, thereby causing the projections to be fused to the adjacent portions of the annular shoulder formed on the barrel of the syringe. As the projecting portions are fused to the shoulder of the syringe, pressure is applied to the needle adapter causing the projecting portions to be somewhat flattened at the outer tapered edges thereof, thereby reducing the longitudinal dimension of these projecting portions substantially in half in the completed assembly as seen, for example, in FIGS. 1 and 2.
The needle adapter is, accordingly, ultrasonically heated and fused only to spaced portions of the annular shoulder on the barrel in the final configuration of the assembly. It is desirable to provide areas of connection between the needle adapter and the syringe of relatively small dimensions so that such areas comprise a minor portion of the area of the annular shoulder. This insures that the annular shoulder on the syringe and the adjacent frangible portion 24 are not deformed during the method of making the assembly and, furthermore, by providing only spaced areas of interconnection between the syringe and the needle adapter, the frangible portion is not reinforced to any substantial degree so that this frangible portion cari still be readily broken after the assembly has been used.
While the needle adapter has been disclosed as being heat fused to the syringe, it should be understood that the needle adapter could also be connected at spaced portions thereof to the syringe by an adhesive substance or the like.
The adapter can, of course, be color coded by molding the adapter of different colored plastic, the color used corresponding to a particular size needle attached to the syringe.
A hypodermic needle includes a cannula 63 interconnected with a hub portion 64 having an internal bore complementary to the outer surface of boss 28 on the syringe. The hub portion includes a pair of radially outwardly diametrically oppositely disposed attaching flanges 65 which cooperate with the attaching portions of the needle adapter to draw the hypodermic needle into operative position and hold the needle on the boss of the syringe.
A conventional needle guard fits snugly about the hub portion of the needle so as to protect the outer sharpened end portion of the cannula until the syringe is to be used.
As this invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, the present embodiment is therefore illustrative and not restrictive.
What is claimed is:
1. The method of joining a tubular plastic needle adapter'to an annular, axially facing shoulder on a plastic syringe barrel to form a syringe and needle adapter assembly, including the steps of forming at least three equally circumferentially spaced apart, tapered, rearwardly axially projecting, radially extending energy directing ribs on the needle adapter, positioning the adapter with the ribs in-engagement with the annular shoulder on the syringe barrel, and applying ultrasonic energy to the adapter and syringe barrel to ultrasonically heat and fuse the adapter to the syringe barrel at only the energy directing ribs, said 111- trasonic energy deforming said ribs and reducing the axially projecting dimension thereof by approximately one half, so that the adapter and syringe barrel are not deformed during assembly thereof and so that the adapter is spaced from said syringe barrel over a major portion thereof and may be readily broken from the syringe barrel when desired.
2. The method as defined in claim 1, including the step of simultaneously applying pressure to the needle adapter to force said spaced portions toward said shoulder while said spaced portions are ultrasonically heated. 1

Claims (2)

1. The method of joining a tubular plastic needle adapter to an annular, axially facing shoulder on a plastic syringe barrel to form a syringe and needle adapter assembly, including the steps of forming at least three equally circumferentially spaced apart, tapered, rearwardly axially projecting, radially extending energy directing ribs on the needle adapter, positioning the adapter with the ribs in engagement with the annular shoulder on the syringe barrel, and applying ultrasonic energy to the adapter and syringe barrel to ultrasonically heat and fuse the adapter to the syringe barrel at only the energy directing ribs, said ultrasonic energy deforming said ribs and reducing the axially projecting dimension thereof by approximately one half, so that the adapter and syringe barrel are not deformed during assembly thereof and so that the adapter is spaced from said syringe barrel over a major portion thereof and may be readily broken from the syringe barrel when desired.
2. The method as defined in claim 1, including the step of simultaneously applying pressure to the needle adapter to force said spaced portions toward said shoulder while said spaced portions are ultrAsonically heated.
US00175310A 1970-04-29 1971-08-26 Method of making syringe and needle adapter assembly by ultrasonic bonding Expired - Lifetime US3728184A (en)

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JPS5179192U (en) * 1974-12-19 1976-06-22
US3966520A (en) * 1975-07-14 1976-06-29 Branson Ultrasonics Corporation Method of ultrasonically welding a circumferential telescoping joint
US3970490A (en) * 1973-12-11 1976-07-20 Burron Medical Products, Inc. Intravenous injection apparatus and needle adapter with filter and method of making same
US4003665A (en) * 1974-03-28 1977-01-18 Kern & Co. Ag Method for the manufacture of writing instruments
US4046610A (en) * 1974-10-07 1977-09-06 Lilja Duane F Fluid product reservoir and method
US4049034A (en) * 1976-07-14 1977-09-20 Baxter Travenol Laboratories, Inc. Attaching means and method for attaching flexible tubing to a plastic container
US4059294A (en) * 1976-05-10 1977-11-22 Syracuse Plastics, Inc. Annular metal fitting for rigid plastic part
FR2371934A1 (en) * 1976-11-24 1978-06-23 Technological Supply DEVICE FOR PLACING AND IMMOBILIZING A PROBE ON A PATIENT
US4181549A (en) * 1977-03-10 1980-01-01 American Hospital Supply Corporation Solvent-bonded joint and method of making the same
US4240424A (en) * 1978-10-23 1980-12-23 American Hospital Supply Corporation Syringe locking sleeve
US4240428A (en) * 1978-10-23 1980-12-23 American Hospital Supply Corporation Segmented syringe locking sleeve
US4712809A (en) * 1983-04-18 1987-12-15 Societe Anonyme Styled Legris Method and device for assembling several components, particularly connection fittings for fluid couplings
US4726481A (en) * 1986-08-01 1988-02-23 Mckesson Corporation Ultrasonically welded container and process
US4838873A (en) * 1985-08-24 1989-06-13 Intermedicat Gmbh Apparatus for introducing liquids and/or elongated elements into a body cavity
US20040059228A1 (en) * 2002-09-23 2004-03-25 Scimed Life Systems, Inc. Systems and methods for flushing catheters
US20040078000A1 (en) * 2002-10-18 2004-04-22 Medtronic, Inc. Implantable drug pump access template
EP1701831A1 (en) * 2004-01-07 2006-09-20 Smiths Medical ASD, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
US20110225790A1 (en) * 2004-01-07 2011-09-22 Smiths Medical Asd, Inc. Needle protection device with gauge specific color coding and method for menufactring thereof
EP1855745A4 (en) * 2005-01-06 2015-12-09 Smiths Medical Asd Inc Safety needle device with snap feature
EP2998093A1 (en) * 2004-01-07 2016-03-23 Smiths Medical ASD, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
US20180126094A1 (en) * 2016-11-07 2018-05-10 Alan Reid Methods and apparatus for syringe adapter
US20200023133A1 (en) * 2017-03-31 2020-01-23 Terumo Kabushiki Kaisha Needle-equipped outer cylinder and method for manufacturing the same

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970490A (en) * 1973-12-11 1976-07-20 Burron Medical Products, Inc. Intravenous injection apparatus and needle adapter with filter and method of making same
US4003665A (en) * 1974-03-28 1977-01-18 Kern & Co. Ag Method for the manufacture of writing instruments
US4046610A (en) * 1974-10-07 1977-09-06 Lilja Duane F Fluid product reservoir and method
JPS5179192U (en) * 1974-12-19 1976-06-22
US3966520A (en) * 1975-07-14 1976-06-29 Branson Ultrasonics Corporation Method of ultrasonically welding a circumferential telescoping joint
US4059294A (en) * 1976-05-10 1977-11-22 Syracuse Plastics, Inc. Annular metal fitting for rigid plastic part
US4049034A (en) * 1976-07-14 1977-09-20 Baxter Travenol Laboratories, Inc. Attaching means and method for attaching flexible tubing to a plastic container
FR2371934A1 (en) * 1976-11-24 1978-06-23 Technological Supply DEVICE FOR PLACING AND IMMOBILIZING A PROBE ON A PATIENT
US4181549A (en) * 1977-03-10 1980-01-01 American Hospital Supply Corporation Solvent-bonded joint and method of making the same
US4240424A (en) * 1978-10-23 1980-12-23 American Hospital Supply Corporation Syringe locking sleeve
US4240428A (en) * 1978-10-23 1980-12-23 American Hospital Supply Corporation Segmented syringe locking sleeve
US4712809A (en) * 1983-04-18 1987-12-15 Societe Anonyme Styled Legris Method and device for assembling several components, particularly connection fittings for fluid couplings
US4838873A (en) * 1985-08-24 1989-06-13 Intermedicat Gmbh Apparatus for introducing liquids and/or elongated elements into a body cavity
US4726481A (en) * 1986-08-01 1988-02-23 Mckesson Corporation Ultrasonically welded container and process
US20040059228A1 (en) * 2002-09-23 2004-03-25 Scimed Life Systems, Inc. Systems and methods for flushing catheters
US20040078000A1 (en) * 2002-10-18 2004-04-22 Medtronic, Inc. Implantable drug pump access template
US7044932B2 (en) * 2002-10-18 2006-05-16 Medtronic, Inc. Implantable drug pump access template
US9199042B2 (en) 2004-01-07 2015-12-01 Smiths Medical Asd, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
US20070208311A1 (en) * 2004-01-07 2007-09-06 Smiths Medical Asd, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
US20110225790A1 (en) * 2004-01-07 2011-09-22 Smiths Medical Asd, Inc. Needle protection device with gauge specific color coding and method for menufactring thereof
EP1701831A4 (en) * 2004-01-07 2012-02-08 Smiths Medical Asd Inc Needle protection device with gauge specific color coding and method for manufacturing thereof
EP1701831A1 (en) * 2004-01-07 2006-09-20 Smiths Medical ASD, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
EP2998093A1 (en) * 2004-01-07 2016-03-23 Smiths Medical ASD, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
US9572941B2 (en) 2004-01-07 2017-02-21 Smiths Medical Asd, Inc. Needle protection device with gauge specific color coding and method for manufacturing thereof
EP1855745A4 (en) * 2005-01-06 2015-12-09 Smiths Medical Asd Inc Safety needle device with snap feature
US20180126094A1 (en) * 2016-11-07 2018-05-10 Alan Reid Methods and apparatus for syringe adapter
US20200023133A1 (en) * 2017-03-31 2020-01-23 Terumo Kabushiki Kaisha Needle-equipped outer cylinder and method for manufacturing the same
US11590287B2 (en) * 2017-03-31 2023-02-28 Terumo Kabushiki Kaisha Needle-equipped outer cylinder and method for manufacturing the same

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