EP1310305A2 - Dispositif de distribution de liquides du type à gachette - Google Patents

Dispositif de distribution de liquides du type à gachette Download PDF

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Publication number
EP1310305A2
EP1310305A2 EP03000944A EP03000944A EP1310305A2 EP 1310305 A2 EP1310305 A2 EP 1310305A2 EP 03000944 A EP03000944 A EP 03000944A EP 03000944 A EP03000944 A EP 03000944A EP 1310305 A2 EP1310305 A2 EP 1310305A2
Authority
EP
European Patent Office
Prior art keywords
liquid
flow path
pressure bearing
sleeve
liquid flow
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
Application number
EP03000944A
Other languages
German (de)
English (en)
Other versions
EP1310305A3 (fr
EP1310305B1 (fr
Inventor
Tadao c/o Yoshino Kogyosho Co. Ltd. Saito
Shigeru c/o Yoshino Kogyosho Co. Ltd. Hayakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Publication of EP1310305A2 publication Critical patent/EP1310305A2/fr
Publication of EP1310305A3 publication Critical patent/EP1310305A3/fr
Application granted granted Critical
Publication of EP1310305B1 publication Critical patent/EP1310305B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
    • 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
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064—Lift valves
    • B05B11/0067—Lift valves having a valve seat located downstream the valve element (take precedence)
    • 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
    • B05B11/0029—Valves not actuated by pressure
    • 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
    • B05B11/0037—Containers
    • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
    • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
    • 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
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0064—Lift valves
    • 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
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/0075—Two outlet valves being placed in a delivery conduit, one downstream the other
    • 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
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1009—Piston pumps actuated by a lever
    • B05B11/1011—Piston pumps actuated by a lever without substantial movement of the nozzle in the direction of the pressure stroke
    • 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
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1061—Pump priming means
    • B05B11/1063—Air exhausted from the pump chamber being discharged into the container during priming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means

Definitions

  • This invention relates to an improved trigger type liquid discharge device to be fitted to an opening of a liquid container containing liquid in order to discharge the liquid.
  • Fig. 16 of the accompanying drawings illustrates a known trigger type liquid discharge device disclosed in U.S. Patent No. 4,819,835 and so designed as to be fitted to the opening of a liquid container containing liquid in order to discharge the liquid.
  • a pump unit E is arranged in parallel with a horizontally disposed discharge pipe unit F as illustrated in Fig. 16.
  • the trigger type liquid discharge device as illustrated in Fig. 16 is provided with a fitting section 101 by which the liquid discharge device is secured to an opening of a liquid container.
  • a trigger 102 of the device is pushed in a direction indicated by arrow J', a pushing member 103 by turn depresses a transversal groove 105 of a head 104 of piston unit G of the device so as to move a piston I until an end face 106 of the piston I abuts a bottom wall 107 of a cylinder H.
  • the liquid filled in a cylinder chamber 108 is pushed out of the device through a liquid suction/discharge port 109 to a liquid flow path 110 so as to push a discharge valve body 111 under its pressure.
  • the discharge valve body 111 has a resiliently deformable section 112, which is resiliently deformed under the pressure of the liquid to open discharge valve seat 113.
  • liquid is allowed to flow into a flow path 115 of the discharge pipe F through discharge valve chamber 114.
  • the liquid flows into another flow path 116 and then a shallow groove M arranged between a liquid guide L and a short pipe K of a nozzle head J.
  • the liquid flows into still another flow path 117 in which spins the liquid, and is finally discharged through a discharge aperture 118.
  • the piston I compresses a spring 119 contained in the piston unit.
  • a ball valve 120 also contained in the unit is forced to abut a suction valve seat 121 under the pressure applied by the liquid of the flow path 110.
  • the piston After completing to discharge the liquid through the discharge aperture 118, and if the trigger 102 is released, the piston is returned to a position shown in Fig. 16 by the resilient force of the spring 119 to expand the cylinder chamber 108 so as to generate a negative pressure in the chamber 108.
  • Such negative pressure acts on the discharge valve body 111 and the ball valve 120 to cause the discharge valve body 111 to firmly abut and close the discharge valve seat 113. Consequently, the ball valve 120 is moved away from the suction valve seat 121 to allow liquid in the liquid container to flow through a suction pipe 122, the liquid flow path 110 and the port 109 into the cylinder chamber 108 so that the device is made ready for another discharge operation.
  • the cylinder H is provided in a part of its peripheral wall with an air intake port 123.
  • the air intake port 123 is held in communication with the liquid container, on which the device is mounted by means of the fitting section 101 of the device, through air ducts 124 and 125.
  • the piston I has a stroke end side resilient annular skirt 126 extending toward the bottom wall 107 of the cylinder H and an approach end side resilient annular skirt 127 extending toward the opening of the cylinder H. Said annular skirts 126 and 127 are held in close contact with the inner wall of the cylinder.
  • the trigger type liquid discharge device as disclosed in US Patent No. 4,819,835 and summarily described above functions correctly so long as a user uses it properly and operates the trigger in such a way that the piston completely moves from the stroke end position to the approach end position.
  • reference symbol N denotes a cap for covering the discharge aperture 117 and reference symbol 0 denotes a pivot of the cap N.
  • liquid may drip out from the discharge aperture 118 at the beginning and the end of a discharge phase.
  • liquid When liquid is discharged as foam, large bubbles of liquid that have not sufficiently foamed may come out through the aperture.
  • the trigger type liquid discharge device of the prior art has such drawbacks.
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe (F) having a discharge aperture, and a trigger for reciprocating the piston, wherein liquid drawn up from the container is discharged through the discharge aperture by movement of the piston to a stroke end, characterised in that an inner peripheral wall of the cylinder is provided with a plurality of short and shallow grooves at a portion adjacent to a bottom wall of the cylinder, said short and shallow grooves running longitudinally, the inner peripheral wall of the cylinder is provided with an air intake port communicating with an inside of the container, the piston is formed with a pair of annular skirts held in close contact with the inner peripheral wall of the cylinder, and a gap separating said pair of annular skirts is so selected that, when one of the annular skirts rides on the short and shallow grooves of the cylinder, the other of the annular skirts is brought into close contact with inner peripheral wall of the a
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe (F) having a discharge aperture, and a trigger for reciprocating the piston, wherein liquid drawn up from the container is discharged through the discharge aperture by movement of the piston to a stroke end, characterised in that a liquid guide is arranged -in a liquid flow path disposed upstream relative to the discharge aperture, said liquid guide comprising a valve body for closing the liquid flow path, a pressure bearing sleeve formed integrally with the valve body, a guide sleeve connecting the valve'body and the pressure bearing sleeve through an opening, the guide sleeve of the liquid guide is inserted into the inside of a guide sleeve of a spin element, the valve body is urged by a spring between the guide sleeve and a guide sleeve to close the liquid flow path, said pressure bearing sleeve has a
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe (F) having a discharge aperture, and a trigger for reciprocating the piston, wherein liquid drawn up from the container is discharged through the discharge aperture by movement of the piston to a stroke end, characterised in that said cylinder of the pump unit comprises an outer sleeve and an inner sleeve concentrically with the outer sleeve, a short and shallow groove is circumferentially provided on an outer surface of the inner sleeve at a position adjacent to a bottom wall of the outer sleeve, and said piston is provided with a skirt which closely contacts with the outer surface of the inner sleeve, and is so arranged that when the skirt is positioned in the short and shallow groove, the liquid flow path communicates to the inside of the container through a gap between the skirt and the short and shallow groove.
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe (F) having a discharge aperture, and a trigger for reciprocating the piston, wherein liquid drawn up from thecontainer is discharged through the discharge aperture by movement of the piston to a stroke end, characterised in that said bottom wall of an inner sleeve of the cylinder is formed with a hole at a centre thereof, said hole communicating-to an upper end of a liquid flow path, said liquid flow path communicating to the container, a short and shallow groove is provided at a boundary between an outer surface of said inner sleeve and a bottom wall of the cylinder, an annular skirt of the piston is inserted into the short and shallow groove upon the stroke end, so that a liquid flow path communicates to the inside of the container through a gap between the inner surface of the piston and the outer surface of the inner sleeve.
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe (F) having a discharge aperture, and a trigger for reciprocating the piston, wherein liquid drawn up from thecontainer is discharged through the discharge aperture by movement of the piston to a stroke end, characterised in that a hole is formed at a centre of a bottom wall of the cylinder, the hole communicates to a liquid flow path which communicates to the inside of the container, the hole is closed by a resilient valve which resiliently contacts to an outer surface of the bottom wall, and a pin body is provided at a centre of the piston toward the bottom wall of the cylinder, and is so provided that when the piston reaches at a stroke end, a front end of the pin body resiliently deforms the resilient valve through the hole so that a cylinder chamber communicates to the liquid flow path.
  • FIGS 1 through 4 show, in enlarged longitudinal cross section, the pump unit of a first embodiment of liquid discharge device in accordance with the first aspect of the present invention.
  • the pump unit 22 comprises a cylinder 23 and a piston 24.
  • the cylinder 23 comprises an outer sleeve 25 designed to cooperate with a piston 24, and an inner sleeve 27 in which a spring 26 is arranged to urge the piston 24 to move back to the retracted position.
  • a cylinder chamber 28 is formed between the outer sleeve 25 and the inner sleeve 27 and held in communication with a liquid flow path 110 provided with a ball valve 120 (which operates as a check valve) by way of a liquid intake/discharge port 30 bored through a bottom wall 29 the cylinder chamber 28.
  • An inner peripheral wall 31 of the outer sleeve 25 is provided with a plurality of short and shallow grooves 32 running longitudinally near the bottom wall 29.
  • pairs of short and low ridges may alternatively be formed longitudinally such that the interval separating each pair of ridges functions as a short groove and shallow groove.
  • the outer sleeve 25 is additionally provided at a position near the bottom wall 29 with an air intake port 123 for drawing out air into the container to which the trigger type liquid discharge device is fitted. Also, at a position closer to the opening 129 of the outer sleeve 25 than the air intake port 123, the outer sleeve 25 is provided with a plurality of shallow outer air feeding grooves 33 running longitudinally.
  • the shallow grooves 32 are short in the longitudinal direction but rather wide in the peripheral direction.
  • a stroke end side end portion of the piston 24 located close to the bottom wall 29 of the cylinder 23 has a rather thick wall portion, which is provided at the inner and outer peripheries with respective resilient annular skirts 35 and 36 extending toward the stroke end side to closely contact with the inner peripheral wall 31 of the outer sleeve 25 and the outer peripheral wall 34 of the inner sleeve 27 respectively.
  • the thick wall portion is additionally provided on the approach end side peripheral edge thereof with an annular skirt 37 extending toward the approach end side to closely contact with the inner peripheral wall 31 of the outer sleeve 25.
  • the interval separating the resilient annular skirts 35 and 37 is so selected that, as seen from Fig. 19, when the annular skirt 35 rides on the short and shallow grooves 32, the annular skirt 37 closely contact with the inner peripheral wall 31 of the outer sleeve 25 at an edge portion 38 of the air intake port 123 located close to the opening 129 of the outer sleeve 25.
  • An interval between the shallow outer air feeding grooves 33 and the air intake port 123 is so selected that, as seen from Fig. 16, when the piston 24 takes the approach end position, the shallow outer air feeding grooves 33 and the air intake port 123 are closed by the annular skirts 35 and 37, whereas, when the piston 24 is in the compression stroke, the annular skirt 37 rides on the shallow outer air feeding grooves 33 as shown in Fig. 17 and outer air is fed into the container via the air intake port 123 as shown by arrow P in Fig. 17, while the communication between the shallow outer air feeding grooves 33 and the air intake port 123 is blocked by the annular skirt 37 before the end of the compression stroke.
  • FIGS 5 and 6 show a second embodiment of trigger type liquid discharge device in accordance with the first aspect of the present invention, having a configuration similar to that of the first embodiment shown in Figures 1 through 4 except the following.
  • the outer sleeve 25 of the cylinder 23 has a single inner diameter.
  • an outer sleeve of the cylinder comprises a large diameter outer sleeve section 39 located on the approach end side and a smaller diameter outer sleeve section 40 located on the stroke end side, said two outer sleeve sections being linked together by a connecting wall section 41 provided with an air intake port 42 that communicates with the inside of the container.
  • the piston 24 is realized as a one-piece component.
  • the piston comprises two components, in other words, an air piston 43 slidably movable in the larger diameter outer sleeve section 39 and a liquid piston 44 fitted in the air piston 43 and slidably movable in the smaller diameter outer sleeve section 40, said air piston 43 and said liquid piston 44 being connected with each other at a top engaging portion 45.
  • the air piston 43 is provided with grooves 43A on an inner peripheral surface thereof at the engaging portion 45.
  • four grooves 43A are mutually displaced by an angle of 90° on the inner peripheral surface of the air piston 43.
  • the liquid piston 44 has a top 44A thereof which is provided with a small hole 44B.
  • the small hole 44B communicates with the grooves 43A so that consequently an inner space 44C of the liquid piston 44, the inner space 27A of the inner sleeve 27 of the cylinder, the gap 27C between the outer peripheral surface 27B of the inner sleeve 27 and the inner peripheral surface 44D of the liquid piston 44, an inner space 43B of the air piston 43 and the air intake port 42 are held in communication with one another.
  • the larger diameter outer sleeve section 39 is provided on the inner peripheral surface thereof with a shallow outer air feeding groove 46.
  • the cylinder is provided at an outer peripheral surface 27B located adjacent to a bottom wall 27D thereof with a short and shallow groove 48 for removing residual pressure.
  • the interval between the annular skirt 49 of the air piston 43 and the annular skirt 50 of the liquid piston 44 is same as its counterpart of the first embodiment. Also, the functions of the outer air feeding groove 46, the short and shallow groove 48 and the annular skirts 49 and 50 are same as their counterparts of the first embodiment.
  • FIG. 7 shows a third embodiment of liquid discharge device in accordance with the first aspect of the present invention.
  • the air piston 43 and the liquid piston 44 are linked together at the top engaging portion 45.
  • a liquid piston 51 is formed at the top thereof with a transversal groove 105 for bearing the pushing member 103 of the trigger 102.
  • the air piston 52 has a fitting sleeve 53 which is secured to a wall 54 of the liquid piston 51 by means of undercuts 55.
  • the cylinder comprises a large diameter outer -sleeve section 39, a small diameter outer sleeve section 40 and an air intake port 42 arranged at a connecting wall section 41 which links the the large diameter outer sleeve section 39 and the small diameter outer sleeve section 40, as in the case of the above described second embodiment
  • the large diameter outer sleeve section 39 is provided on an inner peripheral surface thereof with a shallow outer air feeding groove 46.
  • This third embodiment differs from the above described second embodiment in that the small diameter outer sleeve section 40 is provided on the inner peripheral surface 47 thereof with a short and shallow groove 48A for removing residual pressure.
  • FIG 8 shows a fourth embodiment of liquid discharge device in accordance with the first aspect of the present invention.
  • the liquid discharge device comprises a piston section 56 having an inwardly disposed liquid piston 57 and an outwardly disposed air piston 58 integrally formed with the inwardly disposed liquid piston 57.
  • Said liquid piston 57 and said air piston 58 are provided with annular skirts 59, 60 and 61 directed toward the stroke end side.
  • the air piston 58 is held in close contact with an inner wall surface 64 of a large diameter outer sleeve section 63 of the cylinder 62.
  • the liquid piston 57 is held in close contact with an inner wall surface 66 of a small diameter inner sleeve section 65 of the cylinder 62.
  • the large diameter outer sleeve section 63 is not provided with a shallow groove for introducing outer air on the inner wall surface 64 thereof. Instead, , so that outer air is directly introduced into the container.
  • a short pipe 68 is suspended downward from the air intake port 123 at a position close to the cylinder bottom wall 67.
  • the short pipe 68 is so designed that residual liquid expelled from a short and shallow groove 69 arranged on an inner wall surface 66 of the small diameter inner sleeve section 65 for removing residual pressure falls vertically into the container through gaps between the inner and outer peripheral surfaces of the small diameter inner sleeve section 65, the outer peripheral surface of the liquid piston 57 and the inner peripheral surface of the air piston 58.
  • FIGS 9 and 10 show an embodiment in accordance with the third aspect of the present invention, as well as a fifth embodiment in accordance with the first aspect of the present invention.
  • an inner peripheral wall of a cylinder 72 of a pump unit 71 is divided into a large diameter section 73 located on the open end side and a small diameter section 75 located on the side of the bottom wall 74.
  • An annular skirt 77 is formed on the stroke end side of a piston 76 to resiliently abut the small diameter section. 75 of the cylinder 72.
  • An another annular skirt 78 is formed on the approach end side of the piston 76 to resiliently abut the large diameter section 73 of the cylinder 72.
  • a short and shallow groove 79 is peripherally arranged on the cylinder 72 at a position where the small diameter section 75 of the cylinder 72 is connected to the bottom wall 74.
  • the entire length of the small diameter section 75 is so selected that, when the piston 76 gets to the stroke end and an edge of the annular skirt 77 gets into the short and shallow groove 79, the edge of the other annular skirt 78 is located on a boundary 80 of the large diameter section 73 and the small diameter section 75.
  • a liquid flow path 81 is formed in the small diameter section 75 at a position close to said boundary 80 and communicates with the inside of the container.
  • An air intake port 82 is formed in the large diameter section 73 at a position close to said boundary 80.
  • a plurality of low projecting ridges 84 are formed longitudinally on the inner peripheral wall of the large diameter section 73 of the cylinder 72 in a position slightly closer to the bottom wall 74 than the peripheral position occupied by the annular skirt 78 when the piston 76 gets to the approach end as shown in Fig. 24.
  • any residual pressure that may exist within the piston 76b and in the liquid flow path 86 etc. is discharged to the container through the liquid flow path 81 and the gap between the short and shallow groove 79 and the annular skirt 77 to remove and possible cause of dripping of liquid.
  • annular skirt 78 Since the annular skirt 78 is located on the boundary 80 to open the air intake port 82 under this condition, air flows into the container from the atmosphere to prevent any negative pressure from taking place within the container.
  • the annular skirt 78 runs onto the low projecting grooves 84 to make the air intake port 82 communicate with the atmosphere so as to prevent any negative pressure from taking place within the container.
  • the annular skirt 78 closely contacts with the inner peripheral wall of the large diameter section 73 to prevent the liquid from leaking out through the air intake port 82.
  • said-short and shallow groove 79 may be replaced by a low projecting groove running longitudinally, and the low projecting ridges 84 may be replaced by short and shallow grooves running longitudinally.
  • the low projecting ridges 84 may be replaced by shallow outer air feeding grooves 33 illustrated in Figure 1.
  • FIGS 11 and 12 show an embodiment in accordance with the fourth aspect of the present invention.
  • a cylinder 91 of a pump unit 90 has an inner sleeve 92.
  • a piston 93 has annular skirts 94 and 95 that resiliently abut an inner peripheral wall of the cylinder 92 and an another annular skirt 96 resiliently abuts an outer peripheral wall of the inner sleeve 92.
  • a hole 98 is bored in a bottom wall 97 of the inner sleeve 92 and communicates with an upper end of a liquid flow path 99 formed in the bottom wall 97 and communicating by turn with the inside of the container.
  • a short and.shallow groove 301 is peripherally provided on the outer peripheral surface of the inner sleeve 92 along a connecting section of said outer peripheral surface of the inner sleeve 92 and the bottom wall 100 of the cylinder 91 in such a way that, when the piston 93 gets to the stroke end as shown in Figure 1,2, the edge of the annular skirt 96 gets into the short and shallow groove 301 and a gap is formed between said edge and a bottom of the short and shallow groove 301.
  • an air intake port 302 is formed on the cylinder wall in a position close to the open end of the cylinder than the position of the annular skirt 95 when the piston 93 gets to the stroke end.
  • said short and shallow groove 301 can be replaced by a low projecting ridge running longitudinally.
  • FIGS. 13 and 14 illustrate an embodiment in accordance with the fifth aspect of the present invention.
  • a cylinder 310 of a pump unit 310 is provided in a bottom wall 311 thereof with an coaxial sleeve 314 for receiving a spring 313 for urging back a piston 312.
  • the cylinder 310 is provided with a liquid flow path 319 communicating with the inside of the container.
  • Said spring receiving sleeve 314 is provided at an axial center of its bottom wall 320 with a hole 321 communicating said liquid flow path 319.
  • the liquid guide pipe 317 is provided in its outer peripheral wall facing said hole 321 with an annular groove 322.
  • the annular groove 322 is provided with an annular resilient valve 323.
  • An upper edge of said resilient valve 323 is sandwiched by the liquid guide pipe 317, an outer surface of the bottom wall 311 and the a grasping sleeve 318.
  • a suspending sleeve section 325 of the resilient valve 323 closes said hole 321 from the outside.
  • the piston 312 has annular skirts 326 and 327 which resiliently abut the inner peripheral surface of the cylinder 310.
  • the piston 312 has a pin body 330 arranged at the axial center thereof and projecting from an inner surface of a piston head 328 at the approach end side toward the stroke end side.
  • a front end 331 of the pin body 330 passes through the hole 321.
  • the resilient valve 323 closing said hole 321 from outside resiliently deforms as shown in Figure 14so as to release the closed condition of the hole 321.
  • any residual pressure that may exist in the liquid flow path 316, the cylinder chamber 332 and the port 333 may escape into the container when the piston 312 gets to the stroke end to terminate the liquid discharge cycle, so that any dripping of liquid due to the residual pressure may be effectively prevented from taking place.
  • FIG 15 is an enlarged longitudinal section view of a nozzle head section 401 in accordance with the second aspect of the present invention.
  • the nozzle head section 401 comprises a nozzle head 402, a liquid guide 403, a spin element 404 and a nozzle tip 406 having a discharge aperture 405.
  • Said nozzle head 402 is provided with a valve seat 408 arranged in a liquid flow path 407 at a position upstream, as like the first and second embodiments.
  • the liquid flow path 407 communicates with a liquid flow path 115 of the discharge pipe unit F through a liquid flow path 409, as like the first and second embodiments.
  • Said liquid guide 403 has a valve body 410 and a pressure receiving sleeve 411 integrally formed with the valve body 410.
  • the valve body 410 abuts on the valve seat 408 to close the liquid flow path 407.
  • the pressure receiving sleeve 411 has a pressure bearing surface 414 which is arranged to face the upstream side of the liquid flow path 407 for bearing the liquid pressure.
  • Said liquid guide 403 has a guide sleeve 417 which is inserted into an inside of a guide sleeve 418 of the spin element 404.
  • a coil spring 413 is provided in the compressed state between a spring seat 412 provided on the the guide sleeve 418 and a rear side of the valve body 410. The coil spring 413 presses the valve body 410 to the valve seat 408.
  • the reference numeral 419 denotes a longitudinal projection for supporting the coil spring, which projection is provided in the inside of the guide sleeve 417 of the liquid guide 403.
  • the liquid pressed to the flow path 115 flows through the liquid flow path 409 into the inside of the guide sleeve 417 of the liquid guide 403, and then flows between the longitudinal projections 419 and through an opening 420.
  • the liquid pressure presses a pressure bearing surface 414 of the pressure receiving sleeve 411.
  • the second and third ones have pistons that are configured to allow easier retrieval from the mold to improve their productivity if compared with the first embodiment, because the piston is constituted of an air piston and a liquid piston in the case of the second and third embodiments and additionally the annular skirts of the piston are directed in a same direction in the case of the third embodiment.

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP03000944A 1994-10-26 1995-10-26 Dispositif de distribution de liquides du type à gachette Expired - Lifetime EP1310305B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP28592394 1994-10-26
JP28592394 1994-10-26
JP9402279 1994-12-28
WOPCT/JP94/02279 1994-12-28
EP95935573A EP0738542B1 (fr) 1994-10-26 1995-10-26 Dispositif a gachette servant a pulveriser un liquide

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP95935573A Division EP0738542B1 (fr) 1994-10-26 1995-10-26 Dispositif a gachette servant a pulveriser un liquide

Publications (3)

Publication Number Publication Date
EP1310305A2 true EP1310305A2 (fr) 2003-05-14
EP1310305A3 EP1310305A3 (fr) 2004-03-10
EP1310305B1 EP1310305B1 (fr) 2008-06-25

Family

ID=26435330

Family Applications (3)

Application Number Title Priority Date Filing Date
EP07024747A Expired - Lifetime EP1923143B1 (fr) 1994-10-26 1995-10-26 Dispositif de décharge de liquides de type gâchette
EP95935573A Expired - Lifetime EP0738542B1 (fr) 1994-10-26 1995-10-26 Dispositif a gachette servant a pulveriser un liquide
EP03000944A Expired - Lifetime EP1310305B1 (fr) 1994-10-26 1995-10-26 Dispositif de distribution de liquides du type à gachette

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP07024747A Expired - Lifetime EP1923143B1 (fr) 1994-10-26 1995-10-26 Dispositif de décharge de liquides de type gâchette
EP95935573A Expired - Lifetime EP0738542B1 (fr) 1994-10-26 1995-10-26 Dispositif a gachette servant a pulveriser un liquide

Country Status (8)

Country Link
EP (3) EP1923143B1 (fr)
JP (1) JP3720054B2 (fr)
KR (1) KR100407125B1 (fr)
CN (1) CN1071599C (fr)
AU (1) AU708396B2 (fr)
CA (1) CA2179888C (fr)
DE (2) DE69535748D1 (fr)
WO (1) WO1996013334A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1797002A2 (fr) * 2004-10-08 2007-06-20 Continental Afa Dispensing Company Systeme d'event de pulverisateur a gachette a trainee reduite sur le piston d'event

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2159994B1 (es) * 1997-12-31 2002-05-01 Calmar Monturas Sa Bomba pulverizadora de liquidos.
JP3798222B2 (ja) * 2000-05-11 2006-07-19 株式会社吉野工業所 トリガー式ポンプの製造方法及び該製造方法により製造されるトリガー式ポンプ
JP4767666B2 (ja) * 2005-11-22 2011-09-07 株式会社吉野工業所 トリガー式液体噴出器
JP2007136414A (ja) * 2005-11-22 2007-06-07 Yoshino Kogyosho Co Ltd トリガー式液体噴出器
DE102007021415A1 (de) 2007-04-30 2008-11-06 Ing. Erich Pfeiffer Gmbh Austragvorrichtung
KR102277851B1 (ko) * 2014-03-31 2021-07-16 가부시키가이샤 요시노 고교쇼 스포이트 용기
JP6757695B2 (ja) * 2017-04-19 2020-09-23 株式会社吉野工業所 トリガー式液体噴出器
DE102018100338A1 (de) * 2018-01-09 2019-07-11 Aero Pump Gmbh Austragvorrichtung zum Austragen von flüssigen Medien
CN110053862A (zh) * 2019-04-24 2019-07-26 沈利庆 喷雾泵头

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US4183449A (en) * 1978-01-09 1980-01-15 The Afa Corporation Manually operated miniature atomizer
US4271990A (en) * 1978-05-12 1981-06-09 Security Plastics, Inc. Pumping system for dispensing product from a container
US4317531A (en) * 1979-06-28 1982-03-02 Yoshino Kogyosho Co., Ltd. Accumulator type manual atomizer
EP0295767A2 (fr) * 1987-06-19 1988-12-21 Calmar, Inc. Pompe manuelle pour la distribution de fluides
US4819835A (en) * 1986-07-21 1989-04-11 Yoshino Kogyosho Co., Ltd. Trigger type liquid dispenser
EP0437131A1 (fr) * 1990-01-10 1991-07-17 L'oreal Pompe manuelle à précompression pour la pulvérisation d'un liquide, notamment d'un parfum
JPH07256154A (ja) * 1994-03-25 1995-10-09 Guala Spa 噴霧装置

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US4273290A (en) * 1977-11-14 1981-06-16 The Afa Corporation Unitary valve and spring assembly
US4365751A (en) * 1980-09-26 1982-12-28 Yoshino Kogyosho Co., Ltd. Trigger type liquid injector
US4624413A (en) * 1985-01-23 1986-11-25 Corsette Douglas Frank Trigger type sprayer
CN1008424B (zh) * 1986-01-18 1990-06-20 多田笃 一个手工操纵的扳机式喷枪
US4989790A (en) * 1989-12-26 1991-02-05 Afa Products, Inc. Nozzle cap, spring valve and body assembly
JP2526873Y2 (ja) * 1990-06-05 1997-02-26 株式会社吉野工業所 トリガー式液体噴出容器
JP2542312Y2 (ja) * 1990-07-25 1997-07-23 株式会社吉野工業所 トリガー式噴出器
US5467900A (en) * 1994-03-16 1995-11-21 Afa Products, Inc. Precompression valve for trigger sprayer
JP2892289B2 (ja) * 1994-09-16 1999-05-17 キャニヨン株式会社 トリガ−タイプディスペンサ−およびそのための一方向弁

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183449A (en) * 1978-01-09 1980-01-15 The Afa Corporation Manually operated miniature atomizer
US4271990A (en) * 1978-05-12 1981-06-09 Security Plastics, Inc. Pumping system for dispensing product from a container
US4317531A (en) * 1979-06-28 1982-03-02 Yoshino Kogyosho Co., Ltd. Accumulator type manual atomizer
US4819835A (en) * 1986-07-21 1989-04-11 Yoshino Kogyosho Co., Ltd. Trigger type liquid dispenser
EP0295767A2 (fr) * 1987-06-19 1988-12-21 Calmar, Inc. Pompe manuelle pour la distribution de fluides
EP0437131A1 (fr) * 1990-01-10 1991-07-17 L'oreal Pompe manuelle à précompression pour la pulvérisation d'un liquide, notamment d'un parfum
JPH07256154A (ja) * 1994-03-25 1995-10-09 Guala Spa 噴霧装置

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PATENT ABSTRACTS OF JAPAN vol. 2000, no. 17, 5 June 2001 (2001-06-05) & JP 07 256154 A (GUALA SPA), 9 October 1995 (1995-10-09) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1797002A2 (fr) * 2004-10-08 2007-06-20 Continental Afa Dispensing Company Systeme d'event de pulverisateur a gachette a trainee reduite sur le piston d'event
EP1797002A4 (fr) * 2004-10-08 2008-09-03 Continental Afa Dispensing Co Systeme d'event de pulverisateur a gachette a trainee reduite sur le piston d'event

Also Published As

Publication number Publication date
EP0738542B1 (fr) 2008-05-07
WO1996013334A1 (fr) 1996-05-09
EP1310305A3 (fr) 2004-03-10
AU3754095A (en) 1996-05-23
KR100407125B1 (ko) 2004-05-27
CA2179888A1 (fr) 1996-05-09
JP3720054B2 (ja) 2005-11-24
EP1923143A3 (fr) 2008-08-20
EP1923143B1 (fr) 2010-09-08
CN1137764A (zh) 1996-12-11
EP0738542A4 (fr) 1998-01-07
DE69535748D1 (fr) 2008-06-19
DE69535779D1 (de) 2008-08-07
AU708396B2 (en) 1999-08-05
EP1923143A2 (fr) 2008-05-21
CN1071599C (zh) 2001-09-26
EP0738542A1 (fr) 1996-10-23
CA2179888C (fr) 2007-08-28
EP1310305B1 (fr) 2008-06-25

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