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WO2025228601A1 - Pistolet de pulvérisation pour dispositif de nettoyage haute pression - Google Patents

Pistolet de pulvérisation pour dispositif de nettoyage haute pression

Info

Publication number
WO2025228601A1
WO2025228601A1 PCT/EP2025/058735 EP2025058735W WO2025228601A1 WO 2025228601 A1 WO2025228601 A1 WO 2025228601A1 EP 2025058735 W EP2025058735 W EP 2025058735W WO 2025228601 A1 WO2025228601 A1 WO 2025228601A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
spray gun
contact element
gun according
pivot arm
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.)
Pending
Application number
PCT/EP2025/058735
Other languages
German (de)
English (en)
Inventor
Thomas Fiack
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE 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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of WO2025228601A1 publication Critical patent/WO2025228601A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B05B1/3013—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
    • 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
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • 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

Definitions

  • the invention relates to a spray gun for a high-pressure cleaning device with a housing and a valve arranged in the housing, which has a closing element movable back and forth between a closed position and an open position, and with a trigger lever pivotably mounted about a first pivot axis, which is coupled to the closing element and can be pivoted against the force of a first return spring from a rest position, in which the closing element assumes its closed position, to a working position, in which the closing element assumes its open position, and with a relief lever which is pivotably mounted on the trigger lever about a second pivot axis and which has a first contact element which, in the working position of the trigger lever, can be applied to a second contact element fixed in the housing to relieve the trigger lever.
  • Spray guns of this type allow for the controlled dispensing of liquid pressurized by a high-pressure cleaner.
  • the spray gun has a valve whose closing element can move back and forth between a closed and an open position. In the closed position, the closing element seals against a valve seat, creating a liquid-tight seal, while in the open position, the closing element is separated from the valve seat.
  • a pressure hose for example, can be connected to an inlet of the valve, through which the pressurized liquid from the high-pressure cleaner can be supplied.
  • a spray lance for example, can be connected to an outlet of the valve, through which the pressurized liquid can be directed onto the surface to be cleaned.
  • the closing element is coupled to a trigger lever of the spray gun, which is pivotally mounted about a first pivot axis.
  • the trigger lever can Starting from a rest position, in which the valve body is closed, the user pivots the valve against the force of a first return spring into a working position, in which the valve body is open.
  • the user can move the release lever from the rest position into the working position against the force of the first return spring.
  • the liquid is dispensed as long as the user holds the release lever in the working position with a predetermined holding force.
  • the user releases the release lever it automatically pivots back to its rest position under the force of the first return spring, so that the valve body is closed.
  • DE 35 27 922 A1 proposes the use of a relief lever.
  • This lever is pivotally mounted on the release lever about a second pivot axis and has a first contact element that, in the operating position of the release lever, can be pressed against a second contact element located in the housing to relieve the lever's holding force.
  • the first contact element is designed as a detent lug
  • the second contact element forms a leaf spring with at least one detent opening into which the detent lug can engage in the operating position of the release lever.
  • a tension spring, attached to the release lever acts on the relief lever and biases the detent lug into the detent position.
  • the object of the invention is to further develop a spray gun of the type mentioned above in such a way that the holding force required to keep the trigger lever in its working position can be reliably reduced even during prolonged use of the spray gun.
  • the relief lever has a first pivot arm and a second pivot arm, wherein the first pivot arm has the first contact element and can be acted upon by the trigger lever with a pressure force in the working position, and wherein the second pivot arm has an actuating surface for the user to pivot the relief lever about the second pivot axis, wherein one of the two contact elements forms an inclined surface which is inclined to the direction of action of the pressure force and against which the other of the two contact elements can be applied in the working position of the trigger lever.
  • the spray gun according to the invention has a relief lever for reducing the holding force required to keep the trigger lever in its working position.
  • the relief lever has a first pivot arm on which a first contact element is arranged. In the working position of the trigger lever, this first contact element can be pressed against a second contact element that is fixedly arranged in the housing.
  • the trigger lever exerts a pressure force on the first pivot arm when it assumes its working position. Under the influence of this pressure force, the first contact element is pressed against the second contact element.
  • the user can simultaneously activate the release lever when operating the trigger lever.
  • the second arm of the The release lever creates an actuating surface, allowing the release lever to pivot from its rest position around the first pivot axis into its working position, counteracting the action of the first return spring.
  • the release lever can pivot relative to the release lever around the second pivot axis. This causes the first contact element, located on the first pivot arm of the release lever, to come into contact with the second contact element, which is fixed in the housing. This reduces the holding force that the user must exert on the release lever.
  • One of the two contact elements forms an inclined surface against which the other contact element can be placed when the release lever is in its working position.
  • This inclined surface is angled relative to the direction of the pressure exerted by the release lever on the first pivot arm in its working position.
  • the pressure force is therefore not perpendicular to the inclined surface but at an angle other than 90°, so that a component of the pressure force runs parallel to the inclined surface.
  • the pressure relief lever pivots under the influence of the force component parallel to the inclined surface. This causes the first contact element to move relative to the second contact element, and consequently, the pressure relief lever is no longer supported by the second contact element.
  • the first return spring then returns the release lever to its rest position.
  • the release lever automatically returns to its rest position, in which the valve's closing element rests tightly against the valve seat, thus stopping the flow of liquid.
  • the spray gun according to the invention is characterized by very simple handling, whereby it is ensured that even during prolonged use
  • the spray gun reliably reduces the holding force required to keep the trigger lever in the working position, and on the other hand ensures that the trigger lever returns to its rest position when the user releases the trigger lever and the relief lever.
  • the first contact element is arranged on the first pivot arm of the relief lever. It is advantageous if the first contact element is arranged at the free end of the first pivot arm.
  • the compressive force with which the first pivot arm of the relief lever can be acted upon by the release lever in the working position is preferably aligned in the longitudinal direction of the first pivot arm.
  • one of the two contact elements forms an inclined surface that is inclined in the direction of action of the pressure force exerted by the release lever on the first pivot arm of the relief lever.
  • the two contact elements move relative to each other under the influence of the component of the pressure force that is parallel to the inclined surface.
  • the other of the two contact elements is designed as a freely rotatable contact roller.
  • the freely rotatable contact roller can roll along the inclined surface with very low frictional forces under the influence of the force component of the pressure force acting on the first pivot arm that is parallel to the inclined surface, so that the relief lever is pivoted about the second pivot axis and the release lever can thus return to its rest position unimpeded by the relief lever.
  • the first contact element is designed as a contact roller and the second contact element forms the inclined surface.
  • a contact roller is freely rotatable on the first pivot arm of the relief lever, which, in the working position of the release lever, comes into contact with an inclined surface fixed in the housing.
  • the second pivot arm of the release lever can be pivoted by the user around the second pivot axis against the force of a second return spring.
  • the release lever When the user actuates the release lever, it performs a first pivoting movement around the second pivot axis relative to the release lever. This tensions the second return spring.
  • the second return spring assists a second pivoting movement of the release lever relative to the release lever, opposite to the first pivoting movement. This ensures that the release lever is no longer supported by the release lever against the second contact element and reliably returns to its rest position, in which the valve's closing element rests tightly against the valve seat.
  • the second return spring is designed as a compression spring, via which the second pivot arm of the relief lever is connected to the release lever.
  • the release lever engages in a recess of the trigger lever, with the end section of the first pivot arm, facing away from the second pivot axis, protruding from the trigger lever towards the valve, and with the actuating surface of the second pivot arm protruding from the trigger lever on the same side as the first pivot arm.
  • the relief lever is preferably designed in an L-shape.
  • the spray gun valve has a valve housing. It is advantageous if the valve housing is rigidly connected to a support part, which incorporates the second contact element. This second contact element is thus rigidly held to the valve housing, which is fixed within the housing.
  • the support element is integrally connected to the valve housing.
  • the support element and the valve housing together form a single component. This reduces the manufacturing and assembly costs of the spray gun.
  • the support element has a guide surface, wherein the first contact element is movable along the guide surface when the release lever transitions from the rest position to the working position.
  • the release lever can be moved from the rest position to the working position for dispensing liquid.
  • the first contact element of the release lever can initially be moved along the guide surface of the support element until the release lever assumes its working position and the release lever is pivoted relative to the release lever into a position in which the first contact element comes into contact with the second contact element arranged on the support element.
  • the first contact element can be moved in the opposite direction along the guide surface of the support element, starting from the second contact element.
  • the second contact element connects to the guide surface.
  • the second contact element forms the inclined surface used according to the invention.
  • the support element is designed as a support rib. This enables a further reduction in the manufacturing and assembly costs of the spray gun.
  • Figure 1 a schematic side view of a spray gun
  • Figure 2 a schematic partial sectional view of the spray gun from Figure 1, with a trigger lever in a rest position;
  • Figure 3 a schematic partial sectional view of the spray gun from Figure 1, with the trigger lever in a working position.
  • FIGS 1 to 3 schematically illustrate an advantageous embodiment of a spray gun according to the invention, collectively designated by reference numeral 10.
  • the spray gun 10 comprises a housing 12 in which a valve 14 is fixedly arranged and which forms a handle 16 designed in the manner of a pistol grip, as well as a protective guard 18 extending from the free end of the handle 16 to a housing area in which the valve 14 is arranged. Together with the handle 16, the protective guard 18 surrounds a grip opening 20 into which the user can insert their fingers when gripping the handle 16.
  • a discharge line 22 is arranged in the housing 12, the free end of which, facing away from the valve 14, forms a liquid outlet 24 of the spray gun 10.
  • a spray nozzle or a spray lance, for example, can be connected to the liquid outlet 24.
  • the valve 14 has a valve housing 26, which has a valve inlet 28 and a valve outlet 30, as well as a through-channel 32 extending from the The valve inlet 28 extends to the valve outlet 30 and a closing element 34 is slidably held within it.
  • the outlet line 22 is connected to the valve outlet 30.
  • the valve inlet 28 forms a liquid inlet 36 for the spray gun 10.
  • a pressure hose can be connected to the liquid inlet 36, which is in flow communication with a pressure outlet of a high-pressure cleaning device. Liquid, preferably water, which has been pressurized by the high-pressure cleaning device and can be discharged via the outlet line 22, can be supplied to the spray gun 10 via the pressure hose.
  • the valve housing 26 has a boom 38 on which a release lever 40 is pivotably mounted about a first pivot axis 42.
  • the release lever 40 extends along the front of the handle 16 facing the protective bracket 18 and can be pivoted by the user from a rest position shown in Figures 1 and 2 to a working position shown in Figure 3 by grasping the handle 16 together with the release lever 40 with their fingers.
  • the release lever 40 is coupled to the valve body 34 of the valve 14 via a valve tappet 44, the release lever 40 bearing against an end face of the valve tappet 44 projecting from the valve housing 26.
  • the valve tappet 44 is surrounded in its end region projecting from the valve housing 26 by a first return spring 48, which exerts a closing force on the valve tappet 44, under the influence of which the valve body 34 is biased towards a valve seat.
  • first return spring 48 By pivoting the release lever 40 from the rest position to the working position against the force of the first return spring 48, the valve body 34 can be moved via the valve tappet 44 into an open position, in which the valve body 34 is spaced from the valve seat, allowing pressurized fluid to flow through the passage 32.
  • the valve housing 26 forms a support part 50 in the form of a support rib 52 immediately adjacent to the valve inlet 28, which extends in the direction of the handle 16 and forms a guide surface 54 on its upper side facing the boom 38, to which an inclined surface 56 is attached.
  • the release lever 40 has a recess 58 into which a relief lever 60 engages.
  • the relief lever 60 is pivotally mounted on the release lever 40 about a second pivot axis 62 and is essentially L-shaped. It is designed as a two-armed lever and has a first pivot arm 64 and a second pivot arm 66.
  • the second pivot axis 62 is located in the transition area between the first pivot arm 64 and the second pivot arm 66.
  • the first pivot arm 64 protrudes with one end region facing away from the second pivot axis 62 in the direction of the valve 14 from the recess 58 of the release lever 40 and carries at its free end a first contact element 68 in the form of a freely rotatable contact roller 70.
  • the second pivot arm 66 forms an actuating surface 72 that projects into the handle opening 20 of the housing 12.
  • the second pivot arm 66 is connected to the release lever 40 via a second return spring 74, the return spring 74 being designed as a compression spring.
  • the release lever 40 can be pivoted into the working position about the first pivot axis 42 against the force of the first return spring 48.
  • the relief lever 60 can also be pivoted relative to the release lever 40 about the second pivot axis 62 against the force of the second return spring 74.
  • the contact roller 70 initially moves along the guide surface 54 of the support part 50 and finally reaches the inclined surface 56.
  • the inclined surface 56 forms a second contact element 76, to which the The first contact element 68 in the form of the contact roller 70 can be applied in the working position of the release lever 40.
  • the release lever 40 exerts a compressive force, essentially oriented in the longitudinal direction of the first pivot arm 64, on the first pivot arm 64, which is supported via the first contact element 68 on the second contact element 76, designed as an inclined surface 56.
  • the inclined surface 56 is inclined in the direction of the compressive force, so that the user must apply a certain holding force to the actuating surface 72 of the second pivot arm 66, otherwise the release lever 60 will pivot in such a way that the first contact element 68, in the form of the contact roller 70, leaves its contact position on the second contact element 76, in the form of the inclined surface 56, and comes to rest on the guide surface 54, with the release lever 40 simultaneously performing a pivoting movement towards its rest position.
  • the user To hold the trigger lever 40 in its working position so that liquid can be dispensed from the spray gun 10, the user must exert a holding force on the relief lever 60 and the trigger lever 40.
  • This holding force is significantly less than the restoring force exerted on the trigger lever 40 by the first return spring 48 in the working position.
  • the holding force required to keep the trigger lever 40 in its working position can thus be significantly reduced by using the relief lever 60, as part of the required holding force is compensated by the contact of the first contact element 68 with the second contact element 76.
  • the trigger lever 40 can therefore be held in the working position by the user with relatively little effort, thus preventing fatigue.
  • the user can pivot the release lever 40 together with the relief lever 60 about the first pivot axis 42 from the rest position to the working position.
  • the first The contact element 68 in the form of the contact roller 70, initially moves along the guide surface 54, with the first pivot arm 64 deforming slightly elastically.
  • the contact roller 70 then reaches the inclined surface 56 and can be positioned on the inclined surface 56 by pivoting the relief lever 60 relative to the release lever 40.
  • This allows the release lever 40 to be supported on the inclined surface 56 via the first pivot arm 64 of the relief lever 60, and the user only needs to exert a relatively small holding force to keep the release lever 40 in its working position.
  • the user can release the relief lever 60 and the release lever 40.
  • the pressure force exerted by the release lever 40 on the first pivot arm 64 in combination with the restoring force exerted by the second return spring 74 on the second pivot arm 66, causes the contact roller 60 to roll on the inclined surface 56, which is inclined to the direction of action of the pressure force, and then to move along the guide surface 54, whereby the release lever 40 is pivoted into its rest position under the influence of the force of the first return spring 48, in which the closing element 34 interrupts the flow connection between the valve inlet 28 and the valve outlet 30, so that no more liquid is dispensed from the spray gun 10.

Landscapes

  • Nozzles (AREA)

Abstract

L'invention concerne un pistolet de pulvérisation (10) destiné à un dispositif de nettoyage haute pression, comprenant un boîtier (12) dans lequel est agencée une soupape (14) ayant un corps de fermeture (34), et comprenant un levier de déclenchement (40) qui est monté pivotant autour d'un premier axe de pivotement (42), est couplé au corps de fermeture (34) et peut être pivoté à l'encontre de la force d'un premier ressort de rappel (48) d'une position de repos, dans laquelle le corps de fermeture (34) adopte une position fermée, dans une position de travail (62), dans laquelle le corps de fermeture (34) adopte une position ouverte, et comprenant un levier de détente (60) qui est monté sur le levier de déclenchement (40) de manière pivotante autour d'un second axe de pivotement (62) et qui a un premier élément de contact (68) qui, dans la position de travail du levier de déclenchement (40), peut reposer contre un second élément de contact (76) qui est situé de façon immobile dans le boîtier (12). Afin de développer le pistolet de pulvérisation (10) de telle sorte que la force de maintien requise pour maintenir le levier de déclenchement (40) dans sa position de travail peut être réduite de manière fiable même lorsque le pistolet de pulvérisation (10) est utilisé pendant une période relativement longue, le levier de détente (60) a un premier et un second bras de pivot (64, 66), le premier bras de pivot (64) ayant le premier élément de contact (68) et, dans la position de travail, une force de compression pouvant être appliquée au premier bras de pivot par le levier de déclenchement (40), et le second bras de pivot (66) ayant une surface d'actionnement (72) pour l'utilisateur permettant de faire pivoter le levier de détente (60) autour du second axe de pivot (68), l'un des deux éléments de contact (68, 76) formant une surface inclinée (56) qui est inclinée par rapport à la direction d'action de la force de compression et contre laquelle l'autre des deux éléments de contact (68, 76) peut être amené à rester dans la position de travail du levier de déclenchement.
PCT/EP2025/058735 2024-04-30 2025-03-31 Pistolet de pulvérisation pour dispositif de nettoyage haute pression Pending WO2025228601A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102024112106.8A DE102024112106A1 (de) 2024-04-30 2024-04-30 Spritzpistole für ein hochdruckreinigungsgerät
DE102024112106.8 2024-04-30

Publications (1)

Publication Number Publication Date
WO2025228601A1 true WO2025228601A1 (fr) 2025-11-06

Family

ID=95250905

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/058735 Pending WO2025228601A1 (fr) 2024-04-30 2025-03-31 Pistolet de pulvérisation pour dispositif de nettoyage haute pression

Country Status (2)

Country Link
DE (1) DE102024112106A1 (fr)
WO (1) WO2025228601A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318313A1 (de) 1973-04-12 1974-10-24 Woma Maasberg Co Gmbh W Hochdruckspritzpistole
DE3527922A1 (de) 1985-08-03 1987-02-12 Kaercher Gmbh & Co Alfred Handwerkzeug, insbesondere handspritzpistole fuer hochdruck-reinigungsfluessigkeit
JP3339218B2 (ja) * 1994-10-25 2002-10-28 株式会社丸山製作所 手動式開閉弁
DE102009023370A1 (de) 2009-05-29 2010-12-09 Jäger, Anton Auslösevorrichtung für eine Fluid-Ausstoßvorrichtung
EP1745856B1 (fr) 2005-07-22 2012-10-31 Hammelmann Maschinenfabrik GmbH Pistolet de pulvérisation à haute pression
US10016773B2 (en) * 2015-06-18 2018-07-10 Wagner Spray Tech Corporation Trigger support for a liquid applicator
US20220134361A1 (en) * 2019-02-15 2022-05-05 Promega S.R.L. Spray gun with adjustment element
EP4249126A1 (fr) * 2022-03-25 2023-09-27 Yuan Mei Corp. Dispositif de commande de pistolet de pulvérisation d'eau

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK3079833T3 (en) * 2013-12-12 2018-12-17 Kaercher Alfred Se & Co Kg Valve gun for a high pressure cleaner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318313A1 (de) 1973-04-12 1974-10-24 Woma Maasberg Co Gmbh W Hochdruckspritzpistole
DE3527922A1 (de) 1985-08-03 1987-02-12 Kaercher Gmbh & Co Alfred Handwerkzeug, insbesondere handspritzpistole fuer hochdruck-reinigungsfluessigkeit
JP3339218B2 (ja) * 1994-10-25 2002-10-28 株式会社丸山製作所 手動式開閉弁
EP1745856B1 (fr) 2005-07-22 2012-10-31 Hammelmann Maschinenfabrik GmbH Pistolet de pulvérisation à haute pression
DE102009023370A1 (de) 2009-05-29 2010-12-09 Jäger, Anton Auslösevorrichtung für eine Fluid-Ausstoßvorrichtung
US10016773B2 (en) * 2015-06-18 2018-07-10 Wagner Spray Tech Corporation Trigger support for a liquid applicator
US20220134361A1 (en) * 2019-02-15 2022-05-05 Promega S.R.L. Spray gun with adjustment element
EP4249126A1 (fr) * 2022-03-25 2023-09-27 Yuan Mei Corp. Dispositif de commande de pistolet de pulvérisation d'eau

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