EP0037496A1 - Air-pressurized sprayer - Google Patents
Air-pressurized sprayer Download PDFInfo
- Publication number
- EP0037496A1 EP0037496A1 EP19810102097 EP81102097A EP0037496A1 EP 0037496 A1 EP0037496 A1 EP 0037496A1 EP 19810102097 EP19810102097 EP 19810102097 EP 81102097 A EP81102097 A EP 81102097A EP 0037496 A1 EP0037496 A1 EP 0037496A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- container
- piston
- stopper
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
- B05B9/0805—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material
- B05B9/0811—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material comprising air supplying means actuated by the operator to pressurise or compress the container
- B05B9/0816—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material comprising air supplying means actuated by the operator to pressurise or compress the container the air supplying means being a manually actuated air pump
- B05B9/0822—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material comprising air supplying means actuated by the operator to pressurise or compress the container the air supplying means being a manually actuated air pump a discharge device being fixed to the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/0005—Components or details
- B05B11/0027—Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
- B65D83/22—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means with a mechanical means to disable actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
- F04B3/003—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage with two or more pistons reciprocating one within another, e.g. one piston forning cylinder of the other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2215/00—Child-proof means
- B65D2215/04—Child-proof means requiring the combination of different actions in succession
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nozzles (AREA)
Abstract
Description
- This invention relates to a sprayer, more particularly to an air-pressurized sprayer in which air in a container is pressurized in advance by a pump.
- Aerosol-type sprayers are well-known sprayers which are advantaged in being capable of continuously spraying a full pressurized liquid and in the ease of handling or operation. Containing high-pressure gas such as Freon gas, however, a liquid container used in one such sprayer need be a pressure-resisting container such as a metal can. Further, it is known that Freon gas, which is generally used as the high-pressure gas to be jetted together with a liquid, may cause air pollution.
- On the other hand, manual sprayers represented by trigger type or push-button type sprayers pressurize and spray a liquid by a pumping action caused by a swing of a trigger or a descent of a push button without the assistance of any high-pressure gas. Accordingly, these sprayers need no pressure-resisting container, and will never cause air pollution. With the conventional manual sprayers, however, the liquid is pressurized and sprayed with every pumping action. Further, the spraying condition is closely related to the pressurizing force, so that a great pressure need always be applied to obtain highly minute particles of liquid for spraying. For continuous spraying, moreover, the pumping action need be repeated.
- In order to obviate those drawbacks of the conventional manual sprayers, there are provided air-pressurized sprayers in which high-pressure air is accumulated in advance in a container by sliding a piston. In one such sprayer, a nozzle is lowered not for a pumping operation but only to open a valve for spraying. When the nozzle is lowered, a liquid in the container is pressed by highly pressurized air in the container, and is continuously sprayed in the form of minute particles through the spraying valve. To minimize the number of protrusions from the sprayer, the piston is locked to a position where it is fully in during a spraying operation. In doing this, however, the piston need be forced into the lock position against the residual high-pressure air already pressurized in the container, thus requiring large pushing force. To eliminate such drawback, a prior art air-pressurized sprayer is provided with an air intake which is closed during the pumping operation and, on completion of the pumping operation, is connected with the atmosphere to discharge the residual high-pressure air within the cylinder into the atmosphere, thereby removing the resisting force against the locking action of the piston. With the construction utilizing such air intake, however, the air intake need be entirely blocked during the pumping operation, and also the closed state of the air intake must be maintained while applying large pushing force against the residual high-pressure air, thus complicating the pumping operation.
- It is therefore an object of this invention to provide an air-pressurized sprayer capable of accumulating high-pressure air in a container without sliding a push button.
- To this end, according to the invention, a cylinder is attached to the bottom portion of the container, and a piston is slidden inside the cylinder to pressurize air therein. The pressurized air is supplied from the cylinder to the container through a value.
- The above and further objects and novel features of the invention will more fully appear from the following detailed description when the same is read in connection with the accompanying drawing. It is to be expressly understood, however, that the drawing is for purpose of illustration only and is not intended as a definition of the limits of the invention.
- This invention can be more fully understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:
- Figs. 1 and 2 are a longitudinal sectional view and a top plan view of an air-pressurized sprayer according to an embodiment of this invention, respectively;
- Figs. 3A and 3B are longitudinal sectional views of one-way valves for spraying;
- Fig. 4 is a transverse sectional view taken along line IV - IV of Fig. 1;
- Fig. 5 is a top plan view of a one-way valve for air pressurization;
- Fig. 6 is an enlarged partial longitudinal sectional view of a cylinder;
- Fig. 7A is a transverse sectional view taken along line VII A - VII A of Fig. 6;
- Fig. 7B is a transverse sectional view similar to Fig. 7A and showing a modification of an airtightness release means;
- Fig. 8 is an enlarged partial front view of a piston;
- Fig. 9 is a longitudinal sectional view of an air-pressurized sprayer according to another embodiment of the invention;
- Fig. 10 is a partial longitudinal sectional view of an air-pressurized sprayer according to a third embodiment of the invention;
- Fig. 11 is a fragmentary frant view of a piston;
- Fig. 12 is a partial longitudinal sectional view of an air-pressurized sprayer according to a fourth embodiment of the invention;
- Figs. 13 and 14 are a top plan view and a longitudinal sectional view of a modification of the one-way valve for air pressurization, respectively;
- Figs. 15 and 16 are a rear view and a partially broken side view of an air-pressurized sprayer provided with a child-proof mechanism, respectively;
- Figs. 17 and 18 are a partial rear view and a partially broken, partial side view of an air-pressurized sprayer provided with another child-proof mechanism, respectively;
- Figs. 19 and 20 are a rear view and a partially broken, partial side view of an air-pressurized sprayer provided with still another child-proof mechanism, repsectively; and
- Figs. 21 and 22 are a front view of a push button of the sprayer shown in Fig. 19 and an enlarged sectional view of a stopper of the push button.
- Now-there will be described in detail preferred embodiments of this invention with reference to the accompanying drawings.
- An air-pressurized
sprayer 10 according to a preferred embodiment of the invention, as shown in Fig. 1, includes avalve housing 14 attached to the top portion of acontainer 12 made from plastic, and acylinder 16 attached to the bottom portion of the container. - The number of components can be reduced to facilitate construction by integrally forming the
valve housing 14 with thecontainer 12, as shown in Fig. 1. Thevalve housing 14 contains a one-way valve 18 for spraying which includes a plastic stem 20, arubber gasket 22 capable of blocking alateral hole 21 of the stem, and acompression coil spring 24. The sprayingvalve 18 is received in thevalve housing 14 with afixing ring 26 screwed in an internally threaded portion of the valve housing. The stem 20 of thespraying valve 18 is fitted in a passage 30 formed inside apush button 28 which is located within a recess 27 (see Fig. 2) at the top portion of thecontainer 12. Thepush button 28 is formed integrally with anozzle 29. Attached to the lower end portion of thevalve housing 14 is apipe 31 for leading a liquid inside thecontainer 12 into the sprayingvalve 18. Thus, thelateral hole 21 of the stem 20 is released from the blockade by thegasket 22 when thepush button 28 is pressed down against the biasing force of thespring 24. As a result, the interior of thecontainer 12 is allowed to communicate with the atmosphere through the sprayingvalve 18 to be ready for spraying. As shown in Figs. 3A and 3B, the sprayingvalve 18 may be constructed by integrally forming the stem and compression spring. Such construction leads to a reduction in the number of components and hence to an improvement in the ease of assembling. - The
container 12 is provided with anintegral level bar 32 extending downward from the top portion thereof. Thelevel bar 32 functions as a standard for the level of the liquid which is supplied to thecontainer 12 turned upside down, as mentioned later. Having a plurality ofribs 34 integrally extending along the radial direction from the inner surface thereof, as shown in Fig. 4, thecontainer 12 is fully augmented in strength, especially in strength along the radial direction, so that it can satisfactorily stand highly pressurized air. - The
cylinder 16 is screwed in the bottom portion of thecontainer 12 to extend thereinto. Thecylinder 16 has integrally formed inner andouter walls inner wall 36 being screwed in the lower end portion of thecontainer 12 so that the lower end portion of the container is held between the inner andouter walls ring 40 is interposed between thecylinder 16 and thecontainer 12 to secure liquid-tightness between them. Since the lower end portion of thecontainer 12 is thus held between the inner andouter walls cylinder 16, the engagement between the cylinder and thecontainer 12 may be secure enough to prevent leakage of the liquid even under high pressure. Also, thecylinder 16 may be removably attached to the bottom portion of thecontainer 12 by any other means than screwing. - The
cylinder 16 has avalve 42 for air pressurization at the inner end thereof. Thepressurization valve 42 is a one-way valve which allows only a current of air into thecontainer 12, including avalve plug 48 coupled to avalve body 44 by three rocking strips 46 (see Fig. 5) and capable of moving along the axial direction. Ahollow piston 54 is contained in thecylinder 16 so as to be slide inside the cylinder. Thepiston 54 includes a pair ofpistons way valves pressure chamber 56 defined between thecylinder 16 and the piston. Here thepiston 61 is smaller in diameter than thepiston 60, and the former is slidably contained in the-latter. Like the one-way pressurization valve 42 of thecylinder 16, these one-way valves diameter piston 60 has a number ofair intakes 64, and can be locked to thecylinder 16 by a locking means 66. The locking means 66 need only be able to lock thepiston body 54 to thecylinder 16 or thecontainer 12 at the spraying operation of thesprayer 10, and may be of various constructions without being limited to the construction of Fig. 1 in which an engagingprojection 70 formed on theouter wall 38 of the cylinder is caused to engage an engaginghole 68 formed in the large-diameter piston 60. - The air-pressurized
sprayer 10 of the-above-mentioned construction is operated as folows. First, thecontainer 12 is turned upside down, and thecylinder 16 is rotated to be released from the engagement with thecontainer 12 and then removed together with thepiston 54 from thecontainer 12. Entirely contained in therecess 27 at the top portion of thecontainer 12, thepush button 28 will never be pressed even though the container is inverted. Then, the liquid is supplied into thecontainer 12 to, for example, the tip end of thelevel bar 32. In this invention, thevalve housing 14 and thecylinder 16 are attached respectiveely to the top and bottom portions of thecontainer 12 so that they are separated completely. Accordingly, the supply of the liquid requires only that thecylinder 16 be removed from thecontainer 12, and it is quite unnecessary to disassembly thevalve housing 14. Thus, the disassembly and assembly at the liquid supply are facilitated, and loss of members included in thevalve housing 14 can be prevented. After the liquid supply, thecylinder 16 is screwed again into thecontainer 12. Then, the lock is released, and thepiston 54 is slidden within thecylinder 16. At this time, the large-diameter piston 60 of thepiston 54 is reciprocated in one with the small-diameter piston 61 as the latter is kept contained in the former. Air is sucked in through the air intakes 64, and distorts a skirtlike seal of thepiston 60 to flow into thepressure chamber 56. The air flows into thepressure chamber 56 also through theair suction valves pressure chamber 56 is pressurized by a pumping action caused by the reciprocation of thepiston 54 or the large-diameter piston 60, and flows through theaccumulation valve 42 into thecontainer 12 to be accumulated therein. As the accumulation is advanced, the high-pressure air inside thecontainer 12 acts as resistance force on the large-diameter piston 60 to prevent smooth reciprocation of the piston. Since having the smaller diameter than that of the large-diameter piston 60, the small-diameter piston 61 can slide without substantially suffering the resistance force of the high-pressure air. Accordingly, air under higher pressure can be accumulated in thecontainer 12 by locking the large-diameter piston 60 to thecylinder 16 by the locking means 66 and reciprocating the small-diameter piston 61 inside the large-diameter piston 60. Hereupon, when thepiston 54 is pushed into its lock position inside thecylinder 16, the residual pressurized air in thepressure chamber 56 acts as a resistance force. As seen from Figs. 1 and 6, especially from Fig. 6, therefore, the sprayer of the invention comprises an airtightness release means 74 formed in the inner wall of thecylinder 16 between a forced-in position 72 of thepiston 54 for pumping operation as indicated by a one-dot chain line and the lock position as illustrated. The airtightness release means 74 is formed of, for example, agroove 76 as shown in Fig. 6. During the pumping operation, aseal 78 of the large-diameter piston 60 reciprocates within a range or region below the forced-in position 72, so that the airtightness of thepiston 54 or the large-diameter piston 60 may be maintained effectively. In locking thepiston 54, however, thepiston 54 is pushed in beyond the forced-in position 72 to have itsseal 78 fitted in thegroove 76, so that a gap 80 (see Fig. 7A) is created between theseal 78 and the inner wall of thecylinder 16. As a result, the residual pressurized air in thepressure chamber 56 escapes through thegap 80 into the open air to release the airtightness of the large-diameter piston 60. Thus, thepiston 54 can be easily moved to its lock position without suffering any resistance thereafter. The airtightness release means 74 need only have a function to release the airtight relationship between theseal 78 and the inner wall of thecylinder 16. Further, the airtightness release means 74 is not limited to the configuration of the entirely circular groove, and may be provided with a number of, e.g. four,projections 82 as shown :'.n Fig. 7B. To improve the airtight effect, theseal 78 preferably has agroove 84 is which a lubricant can stay. Thegroove 84 is not limited to the entirely circular groove as shown in Fig. 8, and may alternatively be formed of a number of partial grooves or small recesses. Further, theskirtlike seal 78 may be replaced with an O-ring. - Also, as seen from Fig. 6, the small-
diameter piston 61 is provided with another airtightness release means 174 including agroove 176 which is formed in the inner wall of the large-diameter piston 60 between a forced-inposition 172 as indicated by a one-dot chain line and a lock position as illustrated. Aseal 178 of the small-diameter piston 61 also has agroove 184 for retaining the lubricant. The airtightness release means 174 of the small-diameter piston 61 has the same function as the airtightness release means 74 of the large-diameter piston 60, thereby facilitating the thrusting of the small-diameter piston 61 into the lock position. After the large-diameter piston 60 is locked, the air is fully pressurized by the small-diameter piston 61, and the small-diameter piston 61 is forced into its lock position. Thereafter, when thecontainer 12 is restored to its right position and thepush button 28 is lowered inside therecess 27, the blocking of thelateral hole 21 of the stem 20 by thegasket 22 is released, and the liquid pressed by the pressurized air accumulated in thecontainer 12 rises in thepipe 31 and is continuously discharged from the nozzle into the outside through thelateral hole 21 and passage 30. - Fig. 9 shows another embodiment of the invention. This air-pressurized
sprayer 110 differs from thesprayer 10 in that acontainer 12 is formed integrally with acylinder 16, and that acover section 13 integrally formed with avalve housing 14 is welded to the container. Instead of welding, thecover section 13 may be screwed into thecontainer 12. A locking means 66 between acylinder 16 integrally formed with thecontainer 12 and a large-diameter piston 60 is so designed that an engagingprojection 70 formed.at the lower end of thecontainer 12 may be fitted in an engaginghole 68 formed in the large-diameter piston 60. Since thecontainer 12 and thecylinder 16 are formed integrally, thesprayer 110 is improved in liquid-tightness. - The container used in this invention need not be a pressure-resisting container such as a conventional metal can used for an aerosol sprayer. It is to be understood, however, that pressure-resisting containers of such type can suitably be used. Fig. 10 shows an embodiment using one such conventional pressure-resisting container. This
sprayer 210 includes a pressure-resistingmetal container 212 which is characterized by its vertical symmetry and by having asteel cover 213 at the lower end, too. A valve housing is fixed to a steel cover (not shown) at the upper end of theaprayer 210 by a clamping ring, while acylinder 216 is fixed to the lower-end steel cover 213 by aclamping ring 217.Numeral 219 designates a plug for liquid supply. - With the
sprayer 210 including the pressure-resistingmetal container 212 thus formed in the vertically symmetrical configuration, the manufacturing cost of the die for the container is reduced, and the assembly is facilitated. With such construction, moreover, the sprayer may be high in pressure resistance, and the greater-part of the conventional pressure-resisting metal container may be utilized directly. - As shown in Figs. 10 and 11, a
piston 54 has on itsouter surface projections 221 which press the clampingring 217 toward the cylinder 216: Although fourprojections 221 are equiangularly arranged in this embodiment, at least one projection will suffice. SubstantiallyU-shaped notches 223 surrounding theprojections 221 are formed on the outside of thepiston 54. In such construction, theprojections 221 are pressed against the clampingring 217 with sufficient elasticity due to the existence of thenotches 223. Thus, theclamping ring 217 can securely hold thecylinder 216 between itself and thesteel cover 213. - Fig. 12 shows another embodiment utilizing a pressure-resisting metal container. In this
sprayer 310, acylinder 316 is attached to asteel cover 313 by aplastic clamping member 317 which is outsert-formed on thesteel cover 313. Namely, the clampingmember 317 is provided with an internal-thread portion 319 in which an external-thread portion 321 formed on the outside of the'cylinder 316 is screwed so that the cylinder is fixed to thesteel cover 313. Further, the clampingmember 317 has a downwardly projectedseal 323 which abuts on aninner surface 325 of thecylinder 316 to secure liquid-tightness. Although the clampingmember 317 and thecylinder 316 are removably connected by screwing in the embodiment of Fig. 12, they may be removably connected by any other suitable means. Naturally, the projectedseal 323 may be replaced with any other seal member, such as a skirt-like seal.Numerals cylinder 316 and apiston 354, respectively. - Thus, the
sprayer 310 capable of easy assembly and easy liquid supply may be provided by outsert-forming on thesteel cover 313 the clampingmember 317 which includes the means removably connected to thecylinder 316 and the seal member for liquid-tightness. Further, the integral formation of the clampingmember 317 and thesteel cover 313 can completely prevent the loss of the clampingmember 317 during the liquid supply. - In any of the above-mentioned embodiments, moreover, a one-
way valve 142 for air pressurization as shown in Figs. 13 and 14 may be used in the cylinder instead of using the one-way valve 42 as shown in Fig. 5A. The rocking strips 46 of thevalve 42 extend in a flat manner, whereas rockingstrips 146 of thevalve 142 extend axially or in three dimensions. Therefore, avalve plug 48 of thevalve 142 can be enabled to produce sufficient axial biasing force by attaching avalve body 144 of thevalve 142 to the tip end of the piston with thevalve plug 48 pressing on the valve seat. Accordingly, thevalve 142 can have enough resistance force against the air inside thepressure chamber 56, ensuring reliable valve action. - In the air-pressurized
sprayers push button 28 is preferably provided with what is called a child-proof mechanism which keeps the push button from careless or unexpected depression for accident prevention. For example, a child-proof mechanism 150, as shown in Figs. 15 and 16, includes astopper 154 which is formed integrally with thepush button 28 through ahinge 152. Arectangular recess 156 for containing thestopper 154 is formed in the peripheral surface of thecontainer 12. As seen from Fig. 15, therecess 156 has ashoulder portion 158 against which e.g. the free end of thestopper 154 abuts. Further, adent 160 in the shape of e.g. a subsphere is formed in the surface of-therecess 156 so that a gap is created between the back side of thestopper 154 and the peripheral surface of thecontainer 12 when the dent is partially covered with the free end portion of the stopper.Numeral 162 designates a dent formed on the top of thepush button 28 for smooth location of an operator's finger. - In the sprayer of the above-mentioned construction, the
push button 28 can be prevented from descending by the engagement between theshoulder portion 158 and the free end of the push button even if the push button is pressed. Thus, unexpected depression of thepush button 28 can be avoided even during storage as well as during packing and exhibition. The engagement between thestopper 154 and theshoulder portion 158 of therecess 156 can easily be released by swinging thestopper 154 around thehinge 152, as indicated by a one-dot chain line in Fig. 16. By such release of the engagement, thepush button 28 is allowed to descend, and the desired spraying operation can be performed with ease by depressing thepush button 28 as required. The existence of thedent 160 facilitates the swing of thestopper 154. - The
shoulder portion 158 of therecess 156 need only have a function to prevent thepush button 28 from descending, and is not limited to the arrangement of Figs. 15 and 16 in which it abuts against the free end of thepush button 28. As shown in Figs. 17 and 18, for example, an engagingprojection 164 may be projected from the back of thestopper 154 so that theshoulder portion 158 can engage theprojection 164. In this case, thedent 160 may be formed greater, so that thestopper 154 can be swung more smoothly. - Figs. 19 to 22 show another child-
proof mechanism 170 which includes a seesaw-type stopper 174 formed integrally with thepush button 28 through a pair ofconnection pieces 172. Formed in the peripheral surface of thecontainer 12 is arecess 178 having ashoulder portion 176 against which e.g. the tip end portion of thestopper 174 abuts. - In a sprayer including the child-
proof mechanism 170 of the aforesaid construction, thepush button 28 is prevented from descending by the engagement between theshoulder portion 176 of therecess 178 and thestopper 174 even if thepush button 28 is pressed. The engagement between thestopper 174 and theshoulder portion 176 can easily be released by swinging thestopper 174 in the counterclockwise direction around the connectingpieces 172, as indicated by a one-dot chain line in Fig. 22. By such release of the engagement, thepush button 28 is allowed to descend, and the desired spraying operation can be performed with ease by depressing thepush button 28 as required. - With a
dent 180 for pressing formed on one end portion of thestopper 174, an operator can tactually perceive the proper portion of thestopper 174 to be pressed without visual recognition, thus enjoying increased operating efficiency. Preferably, moreover, a pair of engagingprojections 182 each having e.g. a sub- circular cross section are formed on the distal end portion of thestopper 174, and engagingholes 184 to engage theprojections 182 are formed in theshoulder portion 176. Such combination of the engagingprojections 182 and the engagingholes 184 can ensure full engagement between thestopper 174 and theshoulder portion 176 during storage, thereby positively preventing unexpected depression of thepush button 28. It goes without saying that the same effect may be obtained if the engaging holes are formed in thestopper 174 and engaging projections are formed on theshoulder portion 176. In order to prevent thestopper 174 from accidentally engaging theshoulder portion 176 to prohibit the descent of thepush button 28 in the middle of a spraying operation, it is advisable to form an engagingprojection 186 at the other end portion of thestopper 174 and anengaging hole 188 to engage theprojection 186 in thepush button 28, for example. With such construction, if the engagingprojection 186 is previously engaged with the engaginghole 186, thepush button 28 is always kept descendable to be ready for continuous spraying. Also in this case, the same effect may be obtained if the engaging hole and engaging projection are formed in thestopper 174 and on thepush button 28, respectively. - In the child-
proof mechanism - In the air-pressurized sprayer according to the invention, as described above, a valve housing including a descendable nozzle, a spraying valve which opens in connection with a descending action of the nozzle, and pipe for leading a liquid in a container is attached to the top portion of the container. A cylinder including a piston slidable inside the cylinder and an air pressurization valve which allows air pressurized by the slide of the piston to flow into the container is removably attached to the bottom portion of the container to extend inside the container. Thus, the cylinder and the valve housing are completely separated, so that the liquid supply may be facilitated by removing the cylinder from the container independently of the valve housing. In consequence, loss of members related to the valve housing can be prevented at the time of liquid supply. Since the cylinder, which is attached to the bottom portion of the container to extend therein, is naturally smaller than the container in diameter, resistance force applied to the piston inside the cylinder by the pressurized air in the container is not very great, and the piston can be reciprocated even after the air pressurization inside the container is advanced well enough. Accordingly, fully pressurized air can be accumulated in the container to ensure spraying of highly minute particles. If necessary, the piston may be made up of large and small pistons for higher pressure.
- Further, in the sprayer of the invention, a means for releasing the airtightness between the seal of the piston and the inner wall of the cylinder is formed in the inner wall of the cylinder between the lock position of the piston and the forced-in position of the piston in sliding action. Thus, the airtightness of the piston can be released by the airtightness release means when the piston is pressed toward the lock position beyond the forced-in position after the sliding action. As a result, residual high-pressure air in a pressure chamber defined between a pair of one-way valves separately disposed at the distal ends of the cylinder and the piston escapes into the atmosphere, so that the piston can easily be moved to its lock position without receiving any resistance. Such construction will ensure easy locking, as well as smooth sliding action, of the piston, unlike the prior art construction which requires blocking of an air intake during a pumping action.
Claims (15)
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4162580A JPS56139161A (en) | 1980-03-31 | 1980-03-31 | Pressure storing type sprayer |
JP41625/80 | 1980-03-31 | ||
JP83687/80U | 1980-06-17 | ||
JP83688/80U | 1980-06-17 | ||
JP81694/80 | 1980-06-17 | ||
JP8368880U JPS578375U (en) | 1980-06-17 | 1980-06-17 | |
JP1980083687U JPS6027466Y2 (en) | 1980-06-17 | 1980-06-17 | push button sprayer |
JP8169480A JPS577274A (en) | 1980-06-17 | 1980-06-17 | Pressure-accumulating type sprayer |
JP1980116487U JPS5851962Y2 (en) | 1980-08-18 | 1980-08-18 | push button sprayer |
JP116487/80U | 1980-08-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0037496A1 true EP0037496A1 (en) | 1981-10-14 |
EP0037496B1 EP0037496B1 (en) | 1984-06-27 |
Family
ID=27522184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810102097 Expired EP0037496B1 (en) | 1980-03-31 | 1981-03-20 | Air-pressurized sprayer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0037496B1 (en) |
AR (1) | AR224570A1 (en) |
BR (1) | BR8101902A (en) |
CA (1) | CA1153992A (en) |
MX (1) | MX152668A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677618A1 (en) * | 1991-06-17 | 1992-12-18 | Oreal | Device for spraying a liquid contained in a container |
EP0520285A1 (en) * | 1991-06-26 | 1992-12-30 | Robert Finke GmbH & Co. KG | Container for the spraying of fluid |
US5267674A (en) * | 1991-06-26 | 1993-12-07 | Robert Finke Gmbh & Co. Kg | Container for the spray-dispensing of liquid |
EP0574684A3 (en) * | 1992-06-16 | 1994-02-09 | Raku Gmbh | |
US5480069A (en) * | 1993-07-23 | 1996-01-02 | Chesebrough-Pond's Usa Co. | Aerosol dispensing device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3348740A (en) * | 1966-07-15 | 1967-10-24 | Valve Corp Of America | Tamper-proof actuator for handheld dispensers |
US3848778A (en) * | 1972-08-14 | 1974-11-19 | P Meshberg | Childproof actuator assembly |
US3955720A (en) * | 1972-11-15 | 1976-05-11 | Malone David C | Low pressure dispensing apparatus with air pump |
-
1981
- 1981-03-20 EP EP19810102097 patent/EP0037496B1/en not_active Expired
- 1981-03-20 CA CA000373482A patent/CA1153992A/en not_active Expired
- 1981-03-30 MX MX18660881A patent/MX152668A/en unknown
- 1981-03-30 BR BR8101902A patent/BR8101902A/en not_active IP Right Cessation
- 1981-03-30 AR AR28478181A patent/AR224570A1/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3348740A (en) * | 1966-07-15 | 1967-10-24 | Valve Corp Of America | Tamper-proof actuator for handheld dispensers |
US3848778A (en) * | 1972-08-14 | 1974-11-19 | P Meshberg | Childproof actuator assembly |
US3955720A (en) * | 1972-11-15 | 1976-05-11 | Malone David C | Low pressure dispensing apparatus with air pump |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677618A1 (en) * | 1991-06-17 | 1992-12-18 | Oreal | Device for spraying a liquid contained in a container |
EP0520285A1 (en) * | 1991-06-26 | 1992-12-30 | Robert Finke GmbH & Co. KG | Container for the spraying of fluid |
US5267674A (en) * | 1991-06-26 | 1993-12-07 | Robert Finke Gmbh & Co. Kg | Container for the spray-dispensing of liquid |
EP0574684A3 (en) * | 1992-06-16 | 1994-02-09 | Raku Gmbh | |
US5460300A (en) * | 1992-06-16 | 1995-10-24 | Raku Gmbh | Container with opposed attachable spray head and pump |
US5480069A (en) * | 1993-07-23 | 1996-01-02 | Chesebrough-Pond's Usa Co. | Aerosol dispensing device |
Also Published As
Publication number | Publication date |
---|---|
AR224570A1 (en) | 1981-12-15 |
EP0037496B1 (en) | 1984-06-27 |
CA1153992A (en) | 1983-09-20 |
BR8101902A (en) | 1981-10-06 |
MX152668A (en) | 1985-10-07 |
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Legal Events
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