EP0408865B1 - Ventilpistole, insbesondere für ein Hochdruckreinigungsgerät - Google Patents

Ventilpistole, insbesondere für ein Hochdruckreinigungsgerät Download PDF

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Publication number
EP0408865B1
EP0408865B1 EP90109782A EP90109782A EP0408865B1 EP 0408865 B1 EP0408865 B1 EP 0408865B1 EP 90109782 A EP90109782 A EP 90109782A EP 90109782 A EP90109782 A EP 90109782A EP 0408865 B1 EP0408865 B1 EP 0408865B1
Authority
EP
European Patent Office
Prior art keywords
hand lever
roller
abutment
valve
pistol
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
EP90109782A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0408865A3 (en
EP0408865A2 (de
Inventor
Lothar Hartman
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.)
Suttner GmbH and Co KG
Original Assignee
Suttner GmbH and Co KG
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 Suttner GmbH and Co KG filed Critical Suttner GmbH and Co KG
Priority to AT90109782T priority Critical patent/ATE98912T1/de
Publication of EP0408865A2 publication Critical patent/EP0408865A2/de
Publication of EP0408865A3 publication Critical patent/EP0408865A3/de
Application granted granted Critical
Publication of EP0408865B1 publication Critical patent/EP0408865B1/de
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
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20612—Hand

Definitions

  • the invention relates to a valve gun according to the preamble of claim 1.
  • the teaching of the invention relates generally to valve guns of the structure explained above, that is to say without being limited to the range of high-pressure cleaning devices. Nevertheless, to simplify the explanation, the teaching of the invention will now and in the following be explained using the example of a valve gun for a high-pressure cleaning device, in particular because the teaching of the invention is of particular importance for this area of application. Furthermore, the teaching of the invention is independent of whether the valve body of the valve is opened by pushing or pulling, that is to say whether a plunger or a pull rod, a pulling cable or the like is used as the force transmission element. Regardless of this, the power transmission element is sometimes also referred to below as a plunger, because force transmission elements designed as plungers are particularly widespread in valve guns of the type in question.
  • the known valve gun from which the invention is based (DE-A 3 518 492) has a ball valve with a spring-loaded valve ball as the valve body.
  • the essential force component is that from the system pressure.
  • the opening force required when opening is the product of the system pressure and cross-sectional area of the valve seat.
  • the required actuation force is reduced by the lever ratio on the hand lever. There is a lower limit for the lever ratio, which is determined by the available swinging force of the hand lever and the minimum required actuation path of the ram.
  • a large lever ratio is initially provided in the previously explained valve gun during the opening process; the actuating arm is very short compared to the hand lever.
  • the opening force can be reduced to 20 to 30 N instead of the previously known 100 N on the hand lever.
  • the holding force can be reduced even further when the valve body is open by working with a double lever reduction (DE-C 3 527 922) or using a toggle lever drive (GB-A 513 013).
  • a double lever reduction DE-C 3 527 922
  • a toggle lever drive GB-A 513 013
  • Both have considerable disadvantages, namely, they are extremely complex to construct and, at least in the case of the toggle lever drive, in turn leads to a loss of lever arm when the valve body is opened, that is to say to an increase in the opening force.
  • the invention is based on the object, the above-described, with regard to the opening force already very useful known valve gun with little design effort so that the hand force required when the valve body is open can be made as low as possible.
  • the above-mentioned object is achieved in a valve gun with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.
  • the holding force can be minimized even when the valve body is open.
  • the holding force can be made arbitrarily small by designing the gear connection, i.e. reduced to practically zero.
  • the valve gun shown schematically in FIG. 1 is intended for a high-pressure cleaning device and initially has a gun housing 1, which in the exemplary embodiment shown here consists of plastic and is made of two half-shells or can also be formed in one piece.
  • a handle 2 is formed on the gun housing 1 and a valve 3 is arranged in the gun housing 1.
  • the valve 3 is located between a pressure medium connection 4 and an outlet connection 5, to which, for example, a spray lance (not shown here) can be connected.
  • the pressure medium connection 4 and the outlet connection 5 are integrated with one another in a single, continuous angled tube 6, in which the valve 3 is also arranged.
  • the valve 3 opens against the system pressure, which is shown in the schematic illustration merely as an example as a spherical valve body 9 facing the pressure medium connection 4, loaded by a valve spring 7 in the closing direction and sealingly coming into contact with a valve seat 8. There are other ways of realizing this too. It is also shown that a plunger 10 is provided for opening movement of the valve body 9 against the spring force of the valve spring 7 and the closing force resulting from the system pressure on the valve body 9.
  • the force transmission element 10, here designed as a plunger serves to transmit force to the valve body 9 from a hand lever 12 which is pivotably mounted on the handle 2 on a pivot axis 11 in the gun housing 1.
  • the hand lever 12 has an actuating arm 13 which comes into contact with the force transmission element 10, which in the exemplary embodiment shown is an integral part of the hand lever 12 itself, but also readily protrudes on the opposite side of the pivot axis 11 or lies at a somewhat measured angle with respect to the hand lever 12 can.
  • the force transmission element 10 which in the exemplary embodiment shown is an integral part of the hand lever 12 itself, but also readily protrudes on the opposite side of the pivot axis 11 or lies at a somewhat measured angle with respect to the hand lever 12 can.
  • the tappet 10 For the purpose of a sufficient flow cross-section, the tappet 10 must be displaceable by the actuating arm 13 over a specific (minimum) actuation path when the valve body 9 is open.
  • the lever ratio between the hand lever 12 and the actuating arm 13 is ultimately ultimately classically determined by the upwardly limited pivoting path of the hand lever 12 and the downwardly limited actuating path of the actuating arm 13.
  • the hand lever 12 not only performs a pivoting movement about the pivot axis 11, but that this pivoting movement about the pivot axis 11 is partially superimposed on a displacement movement approximately in the direction of movement of the power transmission element 10.
  • the pivot axis 11 of the hand lever 12 in the gun housing 1 is namely essentially displaceable in the direction of movement of the force transmission element 10 over a certain distance.
  • the pivot axis 11 is mounted in the gun housing 1 or in a separate support part in an elongated hole 14 which extends approximately in the direction of movement of the plunger 10 and is displaceable therein. Accordingly, the pivot axis could also be mounted in a corresponding elongated hole in the hand lever.
  • the displacement movement of the hand lever 12 must be initiated in some way. This is done here in such a way that the displacement movement of the hand lever 12 is derived from the pivoting movement and for this purpose an effective gear connection, in particular a wedge gear connection 15, is provided between the hand lever 12 and the gun housing 1 or the angle tube 6.
  • an effective gear connection in particular a wedge gear connection 15
  • Other gear connections for example via a tension element, are also possible, but a wedge gear connection 15 is particularly simple to construct.
  • the transmission connection 15 can be implemented particularly expediently in that on the hand lever 12 at a distance from the pivot axis 11 a transmission part, in particular a gear roller 16, and on the gun housing 1 or on the angle tube 6 a stationary abutment part, in particular an abutment roller 17, is attached. It is obvious that corresponding roles as gear or abutment parts lead to rolling friction and thus to a lower coefficient of friction than pure sliders or the like.
  • the force transmission element 10 assumes its uppermost position and the gear roller 16 with a little distance to the side of the abutment roller 17 lies, the effective distance of the abutment roller 17 to the pivot axis 11, ie the clear distance between the abutment roller 17 and the pivot axis 11, is less than the effective distance of the gear roller 16 to the pivot axis 11, ie here the distance between the center points.
  • the lateral distance of the center of the pivot axis 11 from the center of the force transmission element 10 is relatively small, ie the lever ratio is relatively large.
  • the pivot axis 11 is pressed into the upper rounding of the elongated hole 14 and fixed therein and the hand lever 12 begins to pivot about the pivot axis 11.
  • the force transmission element 10 in FIG. 4 is pressed down, for example by a distance of approximately 1 mm. This movement is accompanied by a pivoting movement of the gear roller 16 about the pivot axis 11.
  • valve body 9 With the valve body 9 slightly open and thus largely relieved of pressure, the gear roller 16 now comes to bear laterally on the abutment roller 17. This situation is shown in dashed lines in FIG. 4, it is the pressure-relieved position of the valve body 9.
  • the system pressure here has dropped to, for example, 200 bar.
  • the restoring force on the valve body 9 only results from the effective cross-sectional area of the force transmission element 10. no longer from the effective cross-sectional area of the valve body blocking the valve seat 9.
  • the pivot axis 11 now moves downward in the elongated hole 14 in accordance with the rolling movement of the gear roller 16 on the abutment roller 17, so that a displacement of the hand lever 12 is produced parallel to itself, which leads to a corresponding longitudinal displacement of the force transmission element 10.
  • the holding force with the valve body 9 open is already relatively low in this system. However, it can be reduced even further, to practically 0 N or even in the sense of self-retention.
  • the wedge gear connection 15 can be designed so that when the valve body 9 is open, it derives practically all of the restoring force caused by the force transmission element 10 into the stationary abutment.
  • the gear part, in particular the gear roller 16 is in contact with the abutment part, in particular with the abutment roller 17, so that the contact point or the contact line is only slightly offset from the point of action or line of action of the Force transmission element 10 exerted restoring force on the abutment roller 17.
  • the abutment roller 17 is located exactly in the direction of alignment with the central axis of the force transmission element 10.
  • this is not absolutely necessary. Rather, the previously explained mode of operation can also be achieved if the abutment roller 17 is in a completely different location, for example also beyond the pivot axis 11 lies. Even then there is a force flow path for the restoring force of the force transmission element 10, which ultimately ends at the indicated line of action in the abutment roller 17.
  • this angle tube 6 has a bearing bracket 19, which is attached to the angle tube 6, in particular welded on here. This has the advantage over the attachment to the gun housing 1 that the gun housing 1 can be kept free of forces.
  • the invention succeeds in an extraordinarily simple constructive manner in realizing an optimal force curve on the hand lever of a valve gun, namely to make the initial opening force as low as possible, nevertheless realizing the necessary opening travel for the valve body and at the same time practically holding the force when the valve body is open to be arbitrarily small.
  • the lever ratio at the beginning of the opening movement can easily be increased to 1:12 to 1:20, since the required actuation path of the valve body of, for example, 3 mm is nevertheless achieved due to the superimposed displacement movement.

Landscapes

  • Mechanically-Actuated Valves (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Nozzles (AREA)
  • Carbon And Carbon Compounds (AREA)
EP90109782A 1989-07-15 1990-05-23 Ventilpistole, insbesondere für ein Hochdruckreinigungsgerät Expired - Lifetime EP0408865B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90109782T ATE98912T1 (de) 1989-07-15 1990-05-23 Ventilpistole, insbesondere fuer ein hochdruckreinigungsgeraet.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3923499 1989-07-15
DE3923499 1989-07-15
DE3926461 1989-08-10
DE3926461A DE3926461A1 (de) 1989-07-15 1989-08-10 Ventilpistole, insbesondere fuer ein hochdruckreinigungsgeraet

Publications (3)

Publication Number Publication Date
EP0408865A2 EP0408865A2 (de) 1991-01-23
EP0408865A3 EP0408865A3 (en) 1991-07-10
EP0408865B1 true EP0408865B1 (de) 1993-12-22

Family

ID=25883084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109782A Expired - Lifetime EP0408865B1 (de) 1989-07-15 1990-05-23 Ventilpistole, insbesondere für ein Hochdruckreinigungsgerät

Country Status (5)

Country Link
US (1) US5118080A (cs)
EP (1) EP0408865B1 (cs)
AT (1) ATE98912T1 (cs)
DE (2) DE3926461A1 (cs)
DK (1) DK0408865T3 (cs)

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US5597095A (en) * 1993-06-09 1997-01-28 Precision Valve Corporation Dual arm aerosol actuator having a movable and stationary arm
DE9405945U1 (de) * 1994-02-10 1994-07-28 Elektra Beckum Ag, 49716 Meppen Hochdruckreinigungseinrichtung
US5695120A (en) * 1995-07-31 1997-12-09 Furon Company Spray gun
DE19614663C2 (de) * 1996-04-13 2003-11-20 Suttner Gmbh & Co Kg Ventilpistole für ein Wasser-Hochdruckreinigungsgerät
DE19650379A1 (de) * 1996-12-05 1998-06-18 Suttner Gmbh & Co Kg Ventilanordnung mit direkt betätigtem Ventilkörper
US5887315A (en) * 1997-03-12 1999-03-30 Electrolux Llc Handle assembly for floor supported appliances
DE19739943A1 (de) * 1997-09-11 1999-03-18 Wap Reinigungssysteme Handabschaltpistole für Hochdruckreinigungsgeräte
US6305261B1 (en) * 1998-03-23 2001-10-23 Alan J. Romanini Hand-held tool for cutting with high pressure water
DE10159680C1 (de) * 2001-11-30 2003-05-08 Kaercher Gmbh & Co Alfred Schließvorrichtung für die Flüssigkeitsabgabeleitung eines Hochdruckreinigungsgerätes
US6988677B2 (en) * 2002-09-11 2006-01-24 Briggs & Stratton Power Products Group, Llc Wand mounted nozzle holder
US7296760B2 (en) 2004-11-17 2007-11-20 Illinois Tool Works Inc. Indexing valve
US7296759B2 (en) * 2004-11-19 2007-11-20 Illinois Tool Works Inc. Ratcheting retaining ring
US20060202060A1 (en) * 2004-12-06 2006-09-14 Alexander Kevin L Dispensing device handle assembly
US7757973B2 (en) * 2005-04-04 2010-07-20 Illinois Tool Works Inc. Hand-held coating dispensing device
US7460924B2 (en) * 2005-06-16 2008-12-02 Illinois Tool Works Inc. In-gun power supply control
US7364098B2 (en) * 2005-10-12 2008-04-29 Illinois Tool Works Inc. Material dispensing apparatus
WO2007126998A2 (en) * 2006-03-29 2007-11-08 Spraying Systems Co. Hand held trigger-operated spray gun
US7926748B2 (en) 2008-03-10 2011-04-19 Illinois Tool Works Inc. Generator for air-powered electrostatically aided coating dispensing device
US8496194B2 (en) * 2008-03-10 2013-07-30 Finishing Brands Holdings Inc. Method and apparatus for retaining highly torqued fittings in molded resin or polymer housing
US8770496B2 (en) 2008-03-10 2014-07-08 Finishing Brands Holdings Inc. Circuit for displaying the relative voltage at the output electrode of an electrostatically aided coating material atomizer
USD608858S1 (en) 2008-03-10 2010-01-26 Illinois Tool Works Inc. Coating material dispensing device
US8590817B2 (en) 2008-03-10 2013-11-26 Illinois Tool Works Inc. Sealed electrical source for air-powered electrostatic atomizing and dispensing device
US8016213B2 (en) 2008-03-10 2011-09-13 Illinois Tool Works Inc. Controlling temperature in air-powered electrostatically aided coating material atomizer
US7988075B2 (en) 2008-03-10 2011-08-02 Illinois Tool Works Inc. Circuit board configuration for air-powered electrostatically aided coating material atomizer
US7918409B2 (en) * 2008-04-09 2011-04-05 Illinois Tool Works Inc. Multiple charging electrode
US8439281B2 (en) * 2008-08-15 2013-05-14 Hyde Tools, Inc. Modular coatings sprayer
US8225968B2 (en) * 2009-05-12 2012-07-24 Illinois Tool Works Inc. Seal system for gear pumps
WO2015086085A1 (de) * 2013-12-12 2015-06-18 Alfred Kärcher Gmbh & Co. Kg Ventilpistole für ein hochdruckreinigungsgerät
DK3079832T3 (en) 2013-12-12 2018-01-08 Kaercher Gmbh & Co Kg Alfred Valve gun for a high pressure cleaner
CN106269613B (zh) * 2015-06-29 2018-07-06 永春县永荣信息科技有限公司 一种丁酮除漆枪
USD791916S1 (en) * 2016-05-31 2017-07-11 Worthen Industries Spray gun trigger
EP3296021B1 (en) * 2016-09-14 2021-04-07 Graco Minnesota Inc. Piston-valve engagement in fluid sprayers
US20190321838A1 (en) 2018-04-19 2019-10-24 Schieffer Co. International L.C. Spray gun

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Also Published As

Publication number Publication date
DE3926461C2 (cs) 1993-05-19
DE3926461A1 (de) 1991-01-24
DE59003943D1 (de) 1994-02-03
EP0408865A3 (en) 1991-07-10
EP0408865A2 (de) 1991-01-23
DK0408865T3 (da) 1994-01-31
ATE98912T1 (de) 1994-01-15
US5118080A (en) 1992-06-02

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