EP0894539B1 - Pumpenkolben vom Triggertyp-Flüssigkeitsspender - Google Patents

Pumpenkolben vom Triggertyp-Flüssigkeitsspender Download PDF

Info

Publication number
EP0894539B1
EP0894539B1 EP98114798A EP98114798A EP0894539B1 EP 0894539 B1 EP0894539 B1 EP 0894539B1 EP 98114798 A EP98114798 A EP 98114798A EP 98114798 A EP98114798 A EP 98114798A EP 0894539 B1 EP0894539 B1 EP 0894539B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
trigger
liquid
annular skirt
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
EP98114798A
Other languages
English (en)
French (fr)
Other versions
EP0894539A2 (de
EP0894539A3 (de
Inventor
Takaharu Tasaki
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 DE1992632635 priority Critical patent/DE69232635T2/de
Priority to EP98114798A priority patent/EP0894539B1/de
Priority claimed from EP92918710A external-priority patent/EP0616127B1/de
Publication of EP0894539A2 publication Critical patent/EP0894539A2/de
Publication of EP0894539A3 publication Critical patent/EP0894539A3/de
Application granted granted Critical
Publication of EP0894539B1 publication Critical patent/EP0894539B1/de
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
    • B05B11/0005—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
    • B05B11/01—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
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed

Definitions

  • This invention relates to an improvement in a piston of a pump section of a trigger-type liquid dispenser or sprayer to be fitted to an opening of a liquid container for exhausting or ejecting the liquid content of the container.
  • Fig. 10 of the accompanying drawings illustrates a conventional trigger-type liquid dispenser or ejector to be fitted to an opening of a liquid container for exhausting or ejecting the liquid content in the container, where a tilted pump section A is arranged between a vertically disposed dispenser main body B and a horizontally disposed exhausting section C to allow a piston section D to have a sufficient stroke so that the liquid content in the container may be exhausted by a large amount in a single stroke.
  • the dispenser is made of synthetic resin, it requires a cumbersome operation of being three-dimensionally released from a mold in X-, Y- and Z-directions, entailing necessarily the problem of the low productivity.
  • U.S. Patent No. 4,819,835 discloses an improved dispenser for solving the problem of the low productivity.
  • Fig. 8 of the accompanying drawings schematically illustrates a trigger-type liquid dispenser disclosed in the U.S. Patent No. 4,819,835. It includes a pump section E and an exhausting section F arranged horizontally and in parallel with each other so that the operation of releasing the molded product from the mold may be carried out only two-dimensionally in X- and Y-directions to raise the manufacturing efficiency.
  • the pump section E is arranged horizontally, a stroke of a piston section G of the dispenser is reduced so as to reduce an amount of liquid that can be exhausted by a single stroke of the piston section G when compared with the dispenser of Fig. 10.
  • the U.S. Patent discloses to use a cylinder H having a large diameter and a piston I having a large diameter so that the dispenser may exhaust a desired amount of liquid in as single stroke of the piston.
  • the trigger-type liquid dispenser illustrated in Fig. 8 also includes a container fitting section 1 and is rigidly fitted to the opening of a liquid container at the container fitting section 1.
  • a trigger 2 When a trigger 2 is pushed along the direction of arrow J, a press member 3 presses a horizontal groove 5 cut along a lateral side of a head 4 of a piston section G to displace piston I until its end surface 6 abuts a bottom wall 7 of a cylinder H.
  • liquid contained in a cylinder chamber 8 is flowed out through a liquid inlet/outlet port 9 into a liquid path 10 so as to press a discharge valve body 11.
  • the discharge valve body 11 is moved upwardly by the resilience of an elastic section 12 of the discharging valve body 11 to open a discharging valve seat 13.
  • the fluid flows out from a discharging valve chamber 14 into a flow path 15 and then into other flow paths 16 and 17 so that it is finally exhausted or discharged through a nozzle 18.
  • the piston I compresses a spring 19 contained therein, while the liquid in the liquid path 10 presses a ball valve 20 against a suction valve seat 21.
  • An air intake port 23 is provided on a peripheral wall of said cylinder H and communicates with an inside of the liquid container, to which the container fitting section 1 is fitted, by way of air passages 24 and 25.
  • Said piston I is provided with an annular skirt 26 extending at an approach side (or the bottom wall 7 side of the cylinder H) and an annular skirt 27 extending at a stroke end (or an open end side of the cylinder H).
  • the annular skirts 26, 27 are held in close contact with the inner wall surface of the cylinder H.
  • the piston I is found in a position as illustrated in cross section in Fig. 9. Since the air intake port 23 of the cylinder H is located between the two annular skirts 26 and 27, the port 23 remains closed so that no air is allowed to flow into the liquid container, while the content of the liquid container is forced out repeatedly.
  • an aim of the present invention to provide a piston of a pump section of a trigger-type liquid dispenser of the type as shown in Fig. 8 that can ensure air intake if the trigger is moved by only a short stroke and hence avoid any deformation or collapse of the liquid container by atmospheric pressure while maintaining its proper operation of liquid ejection.
  • a trigger-type liquid dispenser for a piston in accordance with the present invention has a construction identical with the one illustrated in Fig. 8 except the piston. Thus, an example of the present invention will be described referring to Fig. 8.
  • an air intake port 100 is provided on a peripheral wall of the cylinder H of the pump section E and communicates with the liquid container, to which the trigger-type liquid dispenser is fitted, via air passages 24 and 25.
  • a piston 101 is moved back and forth by means of a a trigger 2.
  • the piston 101 is provided and integrally formed with a first annular skirt 102 and a second annular skirt 104.
  • the first annular skirt 102 extends at the approach end (or the bottom wall 7 side of the cylinder H) and held in close contact with the inner wall surface of the cylinder H.
  • the second annular skirt 104 extends at the stroke end (or the opening 103 side of the cylinder H) and also held in close contact with the inner wall surface of the cylinder H.
  • a distance between a rear end of said annular skirt 102 and a front end of said annular skirt 104, or an overall axial length L 1 of the annular skirts 102 and 104 is as small as approximating to, or slightly longer than an axial length L 2 of the air intake port 100.
  • the overall axial length L 1 between the end the annular skirt 102 and the end of the annular skirt 104 is arranged as short as possible, but in the extent that the skirts can completely close the air intake port 100 having the axial length L 2 when the piston 101 is positioned at the end of stroke of the piston 101.
  • Fig. 3 is a schematic perspective view of a second embodiment of the piston in accordance with the present invention, which is generally indicated by reference numeral 105.
  • Fig. 7 is an enlarged partial sectional side view of the embodiment of the piston of Fig. 3 under an operating condition.
  • a trigger-type liquid dispenser for a piston in accordance with the present invention also has a construction identical with the one illustrated in Fig. 8 except the piston.
  • the same component is indicated by the same reference numeral in Fig. 8.
  • the piston 105 is provided and integrally formed with a first annular skirt 106 and a second annular skirt 108.
  • the first annular skirt 106 extends at the approach end (or the bottom wall 7 side of the cylinder H) and held in close contact with the inner wall surface of the cylinder H.
  • the second annular skirt 108 extends at the stroke end (or the opening 107 side of the cylinder H) and also held in close contact with the inner wall surface of the cylinder H.
  • Said second annular skirt 108 extending at the stroke end is provided with a notched section, (two notched sections 109, 110 in the illustrated embodiment) at positions corresponding to the air intake port 23.
  • a head 111 of the piston 105 is also provided with a horizontal groove 112 which receives the press member 3 of the trigger 2. Since the horizontal groove 112 is fixedly provided in a relative position relating to the fixed cylinder H, the above described positions corresponding to the air intake port 23 is fixedly defined by defining the positions of the notched sections 109 and 110 relative to the groove 112.
  • a length L 3 of the notched sections 109 and 110 is, as shown by a broken line 105A in Fig. 7, so determined that the piston 105 can completely close the air intake port 23 when it is located at the stroke end position.
  • the air intake port 23 is located vis-a-vis the notched sections 109 and 110 to ensure air to be introduced into the liquid container even when the trigger 2 is moved by only a short stroke and the piston 105 is made to halt at a position as indicated by a solid line in Fig. 7.
  • an end surface 113 of the piston 105 abuts the bottom wall 7 of the cylinder H at the approach end position, as in the case of a conventional piston illustrated in Fig. 8.
  • the notched sections 109 and 110 of a first variation of the embodiment of Figs. 3 and 7 which are cut from an edge 114 of the annular skirt 108 may be replaced by a pair of through holes 115 and 116 as shown in Fig. 4, illustrating a second variation of the second embodiment. Alternatively, they may be replaced by a pair of recesses 117 and 118 as shown in Fig. 5, illustrating a third variation of the second embodiment.
  • the notched sections may be replaced by a series of axially extended and peripherally arranged slots 119 of a cogwheel as shown in Fig. 6, illustrating a fourth variation of the second embodiment.
  • Such an arrangement is advantageous in that the air intake port 23 of the cylinder H may be peripherally displaced anywhere without adversely affecting its operational effect.
  • air is securely and surely introduced into the liquid container even if the trigger is moved repeatedly by only a short stroke in order to exhaust liquid at a reduced rate so that the container is prevented from deformation or collapse due to reduced internal pressure and operates properly for liquid discharge without entailing any structural complication and increase in the number of components and assembling steps.

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (1)

  1. Kolben- (101; 105) und Zylinder-(H)-Anordnung eines Pumpenabschnitts eines Flüssigkeitsspenders vom Triggertyp zur Vorwärts- und Rückwärtsbewegung innerhalb eines Zylinders (H) des Pumpenabschnitts durch einen Trigger (2), wobei der Kolben (101; 105) einen ersten ringförmigen Rand (102; 106) hat, der in Richtung auf ein rückwärtiges Ende des Hubs des Kolbens (101; 105) gerichtet ist, und einen zweiten ringförmigen Rand (104; 108), der in Richtung auf ein vorderes Ende des Hubs des Kolbens (101; 105) gerichtet ist und integral mit dem ersten ringförmigen Rand (102; 106) gebildet ist, wobei die ringförmigen Ränder (102 und 104; 106 und 108) in engem Kontakt mit einer Innenwandfläche des Zylinders (H) gehalten werden und eine Lufteinlassöffnung (100) in einer Umfangswand des Zylinders (H) vorgesehen ist, dadurch gekennzeichnet, dass
    die vordere Kante des zweiten ringförmigen Rands (108) mit mindestens einem gekerbten Abschnitt versehen ist, der in einer Position entsprechend der Lufteinlassöffnung positioniert ist, die durch eine Umfangswand des Zylinders gebohrt ist.
EP98114798A 1992-09-03 1992-09-03 Pumpenkolben vom Triggertyp-Flüssigkeitsspender Expired - Lifetime EP0894539B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1992632635 DE69232635T2 (de) 1992-09-03 1992-09-03 Pumpenkolben vom Triggertyp-Flüssigkeitsspender
EP98114798A EP0894539B1 (de) 1992-09-03 1992-09-03 Pumpenkolben vom Triggertyp-Flüssigkeitsspender

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP92918710A EP0616127B1 (de) 1992-09-03 1992-09-03 Pumpenkolben vom triggertyp-spender
EP98114798A EP0894539B1 (de) 1992-09-03 1992-09-03 Pumpenkolben vom Triggertyp-Flüssigkeitsspender

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP92918710A Division EP0616127B1 (de) 1992-09-03 1992-09-03 Pumpenkolben vom triggertyp-spender

Publications (3)

Publication Number Publication Date
EP0894539A2 EP0894539A2 (de) 1999-02-03
EP0894539A3 EP0894539A3 (de) 1999-08-04
EP0894539B1 true EP0894539B1 (de) 2002-06-05

Family

ID=8212452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114798A Expired - Lifetime EP0894539B1 (de) 1992-09-03 1992-09-03 Pumpenkolben vom Triggertyp-Flüssigkeitsspender

Country Status (1)

Country Link
EP (1) EP0894539B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0303357D0 (en) 2003-02-14 2003-03-19 Wordon Gmbh Pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365751A (en) * 1980-09-26 1982-12-28 Yoshino Kogyosho Co., Ltd. Trigger type liquid injector
CS242610B1 (en) * 1982-11-19 1986-05-15 Miloslav Sorm Double acting mechanical pump for liquid spray
US4618077A (en) * 1984-03-07 1986-10-21 Corsette Douglas Frank Liquid dispensing pump
US4819835A (en) * 1986-07-21 1989-04-11 Yoshino Kogyosho Co., Ltd. Trigger type liquid dispenser

Also Published As

Publication number Publication date
EP0894539A2 (de) 1999-02-03
EP0894539A3 (de) 1999-08-04

Similar Documents

Publication Publication Date Title
US5622317A (en) Pressure buildup trigger sprayer
KR102291569B1 (ko) 페인트 스프레이 건
US5464130A (en) Piston of pump section of trigger-type liquid dispenser
US5687877A (en) Pump dispenser having moveable outlet check valve element
US5540360A (en) Invertible trigger sprayer assembly
US5881927A (en) Pump mechanism
EP0894539B1 (de) Pumpenkolben vom Triggertyp-Flüssigkeitsspender
EP1310305B1 (de) Hebelbetätigte Flüssigkeitsaustragsvorrichtung
US5711460A (en) Trigger type liquid discharge device
JP2520763Y2 (ja) トリガー式往復噴出器
JP3734628B2 (ja) トリガー式液体噴出器
JP3452283B2 (ja) トリガー式噴霧器
CN216459522U (zh) 一种具有续压功能的喷枪
JP3741576B2 (ja) トリガ式液体吐出器
JP4451191B2 (ja) トリガー式液体噴出器
JP7101734B2 (ja) トリガー式液体噴出器
JP3032012B2 (ja) トリガ式液体吐出器のポンプ部のピストン
JP4511856B2 (ja) 噴出装置、および噴出器
JP2008006410A (ja) 押下げヘッド
EP0828683A1 (de) Zerstäuber vom triggertyp mit entlüftungshülse mit integriertem rückschlagventil
CN113953110A (zh) 一种具有续压功能的喷枪
JPH1099742A (ja) トリガー式噴出器

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

17P Request for examination filed

Effective date: 19980817

AC Divisional application: reference to earlier application

Ref document number: 616127

Country of ref document: EP

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

17Q First examination report despatched

Effective date: 20001018

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 616127

Country of ref document: EP

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: 69232635

Country of ref document: DE

Date of ref document: 20020711

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KIRKER & CIE SA

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20021122

Year of fee payment: 11

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

26N No opposition filed

Effective date: 20030306

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

Ref country code: LI

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

Effective date: 20030930

Ref country code: CH

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

Effective date: 20030930

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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 NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050903

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

Ref country code: NL

Payment date: 20100916

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20110831

Year of fee payment: 20

Ref country code: FR

Payment date: 20110922

Year of fee payment: 20

Ref country code: DE

Payment date: 20110831

Year of fee payment: 20

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20120401

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

Ref country code: NL

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

Effective date: 20120401

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69232635

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69232635

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20120902

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20120904

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20120902