EP0738542B1 - Trigger type liquid discharge device - Google Patents

Trigger type liquid discharge device Download PDF

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Publication number
EP0738542B1
EP0738542B1 EP95935573A EP95935573A EP0738542B1 EP 0738542 B1 EP0738542 B1 EP 0738542B1 EP 95935573 A EP95935573 A EP 95935573A EP 95935573 A EP95935573 A EP 95935573A EP 0738542 B1 EP0738542 B1 EP 0738542B1
Authority
EP
European Patent Office
Prior art keywords
liquid
discharge
cylinder
pressure
pressure bearing
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.)
Expired - Lifetime
Application number
EP95935573A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0738542A4 (en
EP0738542A1 (en
Inventor
Tadao Yoshino Kogyosho Co. Ltd. SAITO
Shigeru 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
Priority to EP03000944A priority Critical patent/EP1310305B1/en
Priority to EP07024747A priority patent/EP1923143B1/en
Publication of EP0738542A1 publication Critical patent/EP0738542A1/en
Publication of EP0738542A4 publication Critical patent/EP0738542A4/en
Application granted granted Critical
Publication of EP0738542B1 publication Critical patent/EP0738542B1/en
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
    • 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.
  • Figure 22 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 Figure 22 .
  • the trigger type liquid discharge device as illustrated in Figure 22 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 Figure 22 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 slide 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 U.S. 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 O 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.
  • EP-A-0701950 discloses a flowing-out passage consisting of a small-diameter portion located at the cylinder side and a large-diameter portion located at the orifice side.
  • a secondary valve Provided in the passage is a secondary valve. Skirt-shaped seals are mounted on a secondary valve and set in sliding contact with the inner surface of the flowing-out passage to prevent communication between the small-diameter and large-diameter portions.
  • the secondary valve has a valve spring, a valve body, and a valve seat located at the orifice side. The valve spring sets the valve body in contact with the valve seat. Liquid pressures are applied on the secondary valve on both sides. The valve body can be moved away from the valve seat against the force of the valve spring, by a difference between the liquid pressures.
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe 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, in which:
  • a trigger type liquid discharge device comprising a container, a pump unit having a cylinder and a piston, a discharge pipe 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, in which:
  • a groove for the intake of air is formed on the inner surface of the cylinder between a first position where the annular skirt rides on the short and shallow groove and a second further position which is near the air intake port relative to a third position where the annular skirt is positioned when the piston is positioned at the approach end.
  • Such a device is prevented from excessively decreasing the pressure in the container due to the reciprocation of the pump mechanism.
  • FIGS 1 through 8 illustrate in enlarged views a nozzle head section 1 of a first embodiment of liquid discharge device in accordance with claim 1.
  • the nozzle head section 1 comprises a nozzle head 2, a liquid guide 3, a spin element 4 and a nozzle tip 6 having a discharge aperture 5.
  • the nozzle head 2 is provided with a valve seat 8 arranged in a liquid flow path 7 at a position upstream relative to the discharge aperture 5. Said liquid flow path 7 communicates with the liquid flow path 115 of the discharge pipe unit F via a liquid flow path 9.
  • said liquid guide 3 comprises a valve body 10 which abuts on the valve seat 8 to close the liquid flow path 7, a pressure bearing sleeve 11 integrally formed with the valve body 10, an anchoring member 12 to be secured to the spin element 4 and a spring member 13 for coupling the discharge valve 10 and the pressure bearing sleeve 11 to the anchoring member 12.
  • the pressure bearing sleeve 11 has a pressure bearing surface 14 arranged to face the upstream side of the liquid flow path 7 for bearing liquid pressure.
  • valve body 10 and the pressure bearing sleeve 11 is coupled by means of a sleeve 15 provided with a window 16 which communicates to the liquid flow path 9.
  • a sleeve 15 provided with a window 16 which communicates to the liquid flow path 9.
  • the pressure of the liquid is applied to the liquid bearing surface 14 when the valve body 10 abuts the valve seat 8 to block the liquid flow paths 7 and 9.
  • Said sleeve 15 is integrally formed with a guide sleeve 17 extending to the side of the liquid flow path 9.
  • Said guide sleeve 17 is slidably inserted into the inside of a guide sleeve 18 of the spin element 4 projecting toward the liquid flow path 7, such that it may slidably move without encountering any significant resistance and hence the valve body 10 may move back and forth relative to the valve seat 8, keeping its proper posture.
  • the anchoring member 12 and the spring member 13 are arranged in an annular space 4C between the guide sleeve 18 and an outer sleeve 4B of the spin element 4.
  • the nozzle head 2 has a recess 19 at the front end thereof for bearing and securing or holding the nozzle tip 6 in such a way that a flow path 20 is produced in the form of a spin groove.
  • Reference numeral 21 in the drawings denotes a bore for bearing the pivot 0 of the cap N shown in Figure 22 .
  • the nozzle head 2 is provided with an annular groove 2A for bearing a corresponding annular section 4A of the front end of the spin element 4, and an another annular groove 2B for tightly but slidably bearing the pressure bearing sleeve 11.
  • the nozzle head 2 is so designed that, after fitting the liquid guide 3 thereinto, an outer sleeve 2C is secured to the spin element 4 by means of undercuts 2D. Thus, these are easily assembled.
  • valve body 10 is pressed against the valve seat 8 in Fig. 1 under liquid pressure applied thereto within the horizontal projection surface area X and by the resilient force of the spring member 13.
  • the pressure bearing sleeve 11 is pressed toward the upstream of the liquid flow paths under liquid pressure applied to the horizontal projection surface area of the pressure bearing surface 14.
  • the valve body 10 is moved and opened under liquid pressure the instance when the liquid pressure reaches the level of the proper liquid discharge pressure.
  • valve body 10 is opened when the liquid pressure reaches the proper liquid discharge pressure Y as shown in Figure 23 so that liquid is discharged in the direction indicated by arrow Z in Figure 8 .
  • the valve body is closed when the liquid pressure falls under the proper liquid discharge pressure.
  • Figures 9 through 15 show, in an enlarged scale, the nozzle head 201 of a second embodiment of liquid discharge device in accordance with claim 1. While the nozzle head of the above described first embodiment comprises a one-piece liquid guide 3, the liquid guide 203 of the second embodiment comprises two pieces of an outer member 222 including a valve body 210 and an inner member 223.
  • nozzle head 202 including the nozzle tip 206 of this embodiment is otherwise structurally the same as its counterpart of the first embodiment.
  • the outer member 222 of the liquid guide 203 comprises a valve body 210, a pressure bearing sleeve 211, an anchoring member 212 to be secured to the spin element 204, a spring member 213 and a guide sleeve 217.
  • the valve body 210 blocks the liquid flow path 207 arranged on the side of the nozzle tip 206 and the upstream side liquid flow path 209.
  • the spring member 213 couples the anchoring member 212 to the valve body 210, the pressure bearing sleeve 211 and the guide sleeve 217.
  • the inner member 223 shown in Figs. 13 and 14 is put into and rigidly secured to the guide sleeve 217.
  • Said inner member 223 comprises a head section 224, a flange 225 and a slide sleeve 226.
  • the head section 224 is press-fit into a sleeve section 215 which is formed by extending from the valve body 210 of the outer member 222 toward the upstream side of the liquid flow paths.
  • the flange 225 is press-fit into the guide sleeve 217.
  • the slide sleeve 226 is slidably inserted into the inside of guide sleeve 218 of the spin element 204 such that it may freely slide without encountering any significant resistance.
  • the head section 224 has a through bore 227 arranged at the center thereof and a radial groove 229 arranged at a top 228 thereof.
  • the sleeve section 215 of the outer member 222 has a radial window hole 230 corresponding to the radial groove 229 arranged in the head section 224 of the inner member 223.
  • a guide sleeve 231 extending from the valve seat 208 of the nozzle head 202 toward the upstream side of the liquid flow paths also has a radial window hole 232 corresponding to the radial window hole 230.
  • the liquid flow path 233 of the discharge pipe F is held in communication with the annular groove 222B arranged in front of the pressure bearing surface 214 of the pressure bearing sleeve 211 of the outer member 222 via the port 234 of the spin element 204, the liquid flow path 209, the inner space 226A of the slide sleeve 226 of the inner member 223, the through bore 227, the groove 229 and the window holes 230 and 232.
  • valve body 210 is pressed against the valve seat 208 by liquid pressure applied to the horizontal projection surface area of the inner member 223 facing the liquid flow path 209 and by the resilient force of the spring member 213.
  • the outer member 222 is pressed toward the upstream side of the liquid flow paths under liquid pressure in the liquid flow path 209, which pressure is applied to the horizontal projection surface area of the pressure bearing surface 214 of the pressure bearing sleeve 211 of the outer member 222.
  • An appropriate value for the horizontal projection surface area of the pressure bearing surface 214 is selected such that the component of the force generated by the proper liquid discharge pressure applied to said horizontal projection surface area of the pressure bearing surface 214 is greater than the sum of the force generated by the proper liquid discharge pressure applied to the horizontal surface area of the inner member 223 facing the liquid flow path 209 and the resilient force of the spring member 213.
  • the valve body 210 is moved from the valve seat 208 and opened under liquid pressure to make the liquid flow path 209 communicate with the liquid flow path 207 arranged downstream relative to the valve seat 208 as shown in Fig. 15 so that liquid is discharged through the discharge aperture 205 of the nozzle tip 206.
  • valve body 210 When the liquid pressure falls under the proper liquid discharge pressure, the valve body 210 is closed to completely stop any discharge of liquid so that liquid can be effectively prevented from dripping out as in the case of the first embodiment.
  • the inner member 223 is press-fit into the outer member 222 that is provided with a liquid guide 203 having a valve body 210, and the opening of the slide sleeve 226 of the inner member 223 faces vis-a-vis the liquid flow path 209.
  • the horizontal projection surface area of the slide sleeve 226 as indicated by arrow S in Figs. 9 and 15 can be made very small relative to the corresponding surface area of the first embodiment, so as to increase the ratio of said horizontal projection surface area of the slide sleeve 226 to the horizontal projection surface area of the pressure bearing surface 214 of the pressure bearing sleeve 211.
  • valve body 210 of the second embodiment can be opened simply by using pneumatic pressure in the initial priming operation, the discharge valve 111 as shown in Fig. 33 can be omitted.
  • Figs. 16 through 19 show, in enlarged longitudinal cross section, the pump unit of a first embodiment of liquid discharge device in accordance with claim 3.
  • 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.
  • the low projecting ridges 84 may be replaced by shallow outer air feeding grooves 33 illustrated in Figure 16 or by a boundary 503 illustrated in Figure 20 .
  • Figure 20 illustrates an embodiment of claim 3.
  • a plurality of shallow outer air feeding grooves 33 are depressedly and longitudinally formed on the inner surface of the outer sleeve 25 of the cylinder 23.
  • the outer cylinder 25 has the inner surface which comprises an inner surface 502 at the opening 129 side and an inner surface 501 provided at an area where the resilient annular skirts 35, 36, 37 moves upon a liquid discharge phase.
  • the inner surface 502 has a diameter slightly larger than a diameter of the inner surface 501.
  • a boundary 503 of the diameter between the inner surface 502 and the inner surface 501 has a wave shape as illustrated by a dotted line in Figure 31.
  • This embodiment has the same construction as that of the embodiment illustrated in Figure 16 except the constructions of the above described wave-shaped boundary 503 and a liquid flow sleeve 505 having a check valve 504.
  • Figure 21 shows, in enlarged cross section, a principal area of a trigger type liquid discharge device in accordance with claim 3.
  • the trigger type liquid discharge device has a single nozzle head section 70 comprising a nozzle head 2, a liquid guide 3, a spin element 4 and a nozzle tip 6 the same as those of a liquid discharge device in accordance with claim 1 and illustrated in Figures 1 though 8, while it also has a pump unit 71 comprising cylinder members 39, 40, 41 and 42 and piston members 43, 44, 46, 48, 49 and 50.

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP95935573A 1994-10-26 1995-10-26 Trigger type liquid discharge device Expired - Lifetime EP0738542B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03000944A EP1310305B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device
EP07024747A EP1923143B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP28592394 1994-10-26
JP285923/94 1994-10-26
JP9402279 1994-12-28
WOPCT/JP94/02279 1994-12-28
PCT/JP1995/002203 WO1996013334A1 (fr) 1994-10-26 1995-10-26 Dispositif a gachette servant a pulveriser un liquide

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP07024747A Division EP1923143B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device
EP03000944A Division EP1310305B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Publications (3)

Publication Number Publication Date
EP0738542A1 EP0738542A1 (en) 1996-10-23
EP0738542A4 EP0738542A4 (en) 1998-01-07
EP0738542B1 true EP0738542B1 (en) 2008-05-07

Family

ID=26435330

Family Applications (3)

Application Number Title Priority Date Filing Date
EP03000944A Expired - Lifetime EP1310305B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device
EP95935573A Expired - Lifetime EP0738542B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device
EP07024747A Expired - Lifetime EP1923143B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP03000944A Expired - Lifetime EP1310305B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07024747A Expired - Lifetime EP1923143B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Country Status (8)

Country Link
EP (3) EP1310305B1 (it)
JP (1) JP3720054B2 (it)
KR (1) KR100407125B1 (it)
CN (1) CN1071599C (it)
AU (1) AU708396B2 (it)
CA (1) CA2179888C (it)
DE (2) DE69535779D1 (it)
WO (1) WO1996013334A1 (it)

Families Citing this family (10)

* 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
US7311227B2 (en) * 2004-10-08 2007-12-25 Continental Afa Dispensing Company Trigger sprayer venting system with reduced drag on vent piston
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
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EP1923143A2 (en) 2008-05-21
AU708396B2 (en) 1999-08-05
AU3754095A (en) 1996-05-23
EP1310305A3 (en) 2004-03-10
CN1071599C (zh) 2001-09-26
WO1996013334A1 (fr) 1996-05-09
JP3720054B2 (ja) 2005-11-24
CN1137764A (zh) 1996-12-11
EP0738542A4 (en) 1998-01-07
EP1923143A3 (en) 2008-08-20
DE69535779D1 (de) 2008-08-07
CA2179888C (en) 2007-08-28
EP1310305B1 (en) 2008-06-25
CA2179888A1 (en) 1996-05-09
EP1923143B1 (en) 2010-09-08
EP0738542A1 (en) 1996-10-23
DE69535748D1 (it) 2008-06-19
EP1310305A2 (en) 2003-05-14
KR100407125B1 (ko) 2004-05-27

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