EP1923143B1 - Trigger type liquid discharge device - Google Patents

Trigger type liquid discharge device Download PDF

Info

Publication number
EP1923143B1
EP1923143B1 EP07024747A EP07024747A EP1923143B1 EP 1923143 B1 EP1923143 B1 EP 1923143B1 EP 07024747 A EP07024747 A EP 07024747A EP 07024747 A EP07024747 A EP 07024747A EP 1923143 B1 EP1923143 B1 EP 1923143B1
Authority
EP
European Patent Office
Prior art keywords
liquid
piston
sleeve
flow path
pressure
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
EP07024747A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1923143A2 (en
EP1923143A3 (en
Inventor
Tadao Saito
Shigeru 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 EP1923143A2 publication Critical patent/EP1923143A2/en
Publication of EP1923143A3 publication Critical patent/EP1923143A3/en
Application granted granted Critical
Publication of EP1923143B1 publication Critical patent/EP1923143B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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.
  • Fig. 33 of the accompanying drawings illustrates a known trigger type liquid discharge device disclosed in U.S. Patent No. 4,819,835 and also in JP 04017855U 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. 33 .
  • the trigger type liquid discharge device as illustrated in Fig. 33 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. 33 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 in JP 04017855U 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.
  • the above object is achieved by providing a trigger type liquid discharge device as set out in the accompanying claim.
  • a trigger type liquid discharge device For the purpose of the present invention, all the components of a trigger type liquid discharge device according to the invention operate similarly as their counterparts of a conventional trigger type liquid discharge device illustrated in Fig. 33 and described above except the nozzle head section and the pump unit. Thus, those components that are similar to or the same as their counterparts of Fig. 33 should be referred. Throughout Figs. 1 to 32 , the same and identical components are denoted by the same reference symbols.
  • 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 O of the cap N shown in Fig. 33 .
  • 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 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 instant 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 Fig. 34 so that liquid is discharged in the direction indicated by arrow Z in Fig. 8 .
  • the valve body is closed when the liquid pressure falls under the proper liquid discharge pressure.
  • Figs 9 through 15 show, not embodying the present invention, in an enlarged scale, a nozzle head 201. While the nozzle head comprises a one-piece liquid guide 3, the liquid guide 203 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 is otherwise structurally same as its counterpart of the first construction.
  • 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-à-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 construction, 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 construction 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 not embodying the present invention, show a pump unit 22 comprising 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 of 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 contacts 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. 20 and 21 show trigger type liquid discharge device having a configuration similar to that of the construction of Figs 16 through 19 except the following.
  • 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 the same as its counterpart of the Fig. 16 through 19 construction. Also, the functions of the outer air feeding groove 46, the short and shallow groove 48 and the annular skirts 49 and 50 are the same as their counterparts of the first embodiment.
  • Fig. 22 shows a liquid discharge device which differs from the construction of Figs. 20 and 21 , which has the air piston 43 and the liquid piston 44 linked together at the top engaging portion 45, in that 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 large diameter outer sleeve section 39 and the small diameter outer sleeve section 40, as in the case of the above described Figs. 20 and 21 construction.
  • the large diameter outer sleeve section 39 is provided on an inner peripheral surface thereof with a shallow outer air feeding groove 46.
  • 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. 23 shows a liquid discharge device comprising 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, 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.
  • 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.
  • 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.
  • reference numeral 83 denotes a liquid intake/discharge port.
  • 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 any 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 Fig. 16 or by a boundary 503 illustrated in Fig. 31 .
  • Figs 26 and 27 show a construction in which 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 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 Fig. 27 , 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. 28 and 29 illustrate a construction in which a cylinder 310 of a pump unit 309 is provided in a bottom wall 311 thereof with a coaxial sleeve 314 for receiving a spring 313 for urging back a piston 312.
  • the cylinder 310 At a position on an outer surface of the bottom wall 311 and facing a liquid guide pipe 317 having a check valve 315 and a liquid flow path 316, 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 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 Fig. 29 so 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. 30 is an enlarged longitudinal section view of a nozzle head section 401 in accordance with 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, like the construction of Figs. 16 through 19 and Figs. 20 and 21 .
  • the liquid flow path 407 communicates with a liquid flow path 115 of the discharge pipe unit F through a liquid flow path 409.
  • 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 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 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 move 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 Fig. 31 .
  • This construction is the same as that illustrated in Fig. 16 except the constructions of the above described wave-shaped boundary 503 and a liquid flow sleeve 505 having a check valve 504.
  • the cylinder 23 is easily removed from a metal mold.
  • the pistons are configured to allow easier retrieval from the mold to improve their productivity if compared with the Figs. 16 through 19 construction, because the piston is constituted by an air piston and a liquid piston in the case of such described constructions and additionally the annular skirts of the piston may be directed in a same direction.
  • Fig. 32 shows, in enlarged cross section, a principal area of a trigger type liquid discharge device.
  • 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 same as those of a liquid discharge device, illustrated in Figs. 1 through 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 same as those of a liquid discharge device illustrated in Figs. 20 and 21 .
  • a pump unit 71 comprising cylinder members 39, 40, 41 and 42 and piston members 43, 44, 46, 48, 49 and 50 same as those of a liquid discharge device illustrated in Figs. 20 and 21 .

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP07024747A 1994-10-26 1995-10-26 Trigger type liquid discharge device Expired - Lifetime EP1923143B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP28592394 1994-10-26
JP9402279 1994-12-28
EP95935573A EP0738542B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP95935573.6 Division 1995-10-26
EP95935573A Division EP0738542B1 (en) 1994-10-26 1995-10-26 Trigger type liquid discharge device

Publications (3)

Publication Number Publication Date
EP1923143A2 EP1923143A2 (en) 2008-05-21
EP1923143A3 EP1923143A3 (en) 2008-08-20
EP1923143B1 true EP1923143B1 (en) 2010-09-08

Family

ID=26435330

Family Applications (3)

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

Family Applications After (2)

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

Country Status (8)

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

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
WO2015152259A1 (ja) * 2014-03-31 2015-10-08 株式会社吉野工業所 スポイト容器
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

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4273290A (en) * 1977-11-14 1981-06-16 The Afa Corporation Unitary valve and spring assembly
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
JPS61905Y2 (he) * 1979-06-28 1986-01-13
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
EP0254505B1 (en) 1986-07-21 1992-04-22 Yoshino Kogyosho Co., Ltd. Trigger type liquid dispenser
US4747523A (en) * 1987-06-19 1988-05-31 Calmar, Inc. Manually actuated dispensing pump
US4989790A (en) * 1989-12-26 1991-02-05 Afa Products, Inc. Nozzle cap, spring valve and body assembly
FR2656900B1 (fr) * 1990-01-10 1994-01-28 Oreal Pompe manuelle a precompression pour la pulverisation d'un liquide, notamment d'un parfum.
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
EP0688608A1 (en) * 1994-03-25 1995-12-27 GUALA S.p.A. An atomizer device for manually operated pumps
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

Also Published As

Publication number Publication date
EP1923143A2 (en) 2008-05-21
JP3720054B2 (ja) 2005-11-24
EP1310305A2 (en) 2003-05-14
DE69535779D1 (de) 2008-08-07
CN1071599C (zh) 2001-09-26
AU708396B2 (en) 1999-08-05
EP0738542B1 (en) 2008-05-07
CA2179888A1 (en) 1996-05-09
EP0738542A4 (en) 1998-01-07
EP1310305A3 (en) 2004-03-10
EP0738542A1 (en) 1996-10-23
EP1310305B1 (en) 2008-06-25
EP1923143A3 (en) 2008-08-20
KR100407125B1 (ko) 2004-05-27
CA2179888C (en) 2007-08-28
AU3754095A (en) 1996-05-23
DE69535748D1 (he) 2008-06-19
CN1137764A (zh) 1996-12-11
WO1996013334A1 (fr) 1996-05-09

Similar Documents

Publication Publication Date Title
EP1923143B1 (en) Trigger type liquid discharge device
EP0867228B1 (en) A pump mechanism for ejecting liquid
EP0224610A1 (en) A manually operated trigger type dispenser
KR100692457B1 (ko) 축압식 액체 분출기
JP2004511324A (ja) 差動ピストンで形成される出口弁を有する投与部材
US5711460A (en) Trigger type liquid discharge device
US5332128A (en) Flap valve assembly for trigger sprayer
CN110035831B (zh) 触发器泵分配器
AU745856B2 (en) Trigger type liquid discharge device
US5464130A (en) Piston of pump section of trigger-type liquid dispenser
JP4038344B2 (ja) 蓄圧式液体噴出器
JP3762170B2 (ja) トリガ式液体吐出器
KR102682170B1 (ko) 노즐
JPH1034039A (ja) 液体噴出器
EP0894539B1 (en) Piston of pump section of trigger-type liquid dispenser
CN216459522U (zh) 一种具有续压功能的喷枪
JP2007136414A (ja) トリガー式液体噴出器
JP3741576B2 (ja) トリガ式液体吐出器
JP2556290Y2 (ja) マーキング用ガン
JP2024128613A (ja) 連続噴出型ポンプ、および、連続噴出型容器
JP4588851B2 (ja) ポンプディスペンサ
JP2750141B2 (ja) 手動予圧式スプレーヘッド
JP3929240B2 (ja) トリガ式液体噴出器
CN113953110A (zh) 一种具有续压功能的喷枪
JP2000167449A (ja) 液体射出器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 0738542

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 20090220

17Q First examination report despatched

Effective date: 20090324

AKX Designation fees paid

Designated state(s): CH DE FR GB IT LI NL

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 0738542

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69536103

Country of ref document: DE

Date of ref document: 20101021

Kind code of ref document: P

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100908

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101031

26N No opposition filed

Effective date: 20110609

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 69536103

Country of ref document: DE

Effective date: 20110609

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20140910

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20141008

Year of fee payment: 20

Ref country code: DE

Payment date: 20141023

Year of fee payment: 20

Ref country code: GB

Payment date: 20141022

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69536103

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20151025

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20151025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20151025