WO2017194171A1

WO2017194171A1 - Valve gun for a high-pressure cleaning device

Info

Publication number: WO2017194171A1
Application number: PCT/EP2016/060898
Authority: WO
Inventors: Michael Maier; Christoph Breuer; Ralph Seitter; Daniel KNÖDLER
Original assignee: Alfred Kärcher Gmbh & Co. Kg
Priority date: 2016-05-13
Filing date: 2016-05-13
Publication date: 2017-11-16
Also published as: EP3454993B1; DK3454993T3; EP3454993A1; CN109070108B; CN109070108A

Abstract

The invention relates to a valve gun (10, 100, 120) for a high-pressure cleaning device having a gun housing (12), which has a handle (28) having an upper end region (30) associated with the user's thumb and forefinger and having a lower end region (32) associated with the user's little finger. Said cleaning device also has a valve (38) which is arranged in the gun housing (12) in the flow path between a liquid inlet (46) and a liquid outlet (22) and has a closing member (66, 136) which in a closed position rests tightly against a valve seat (60, 138) and can be moved into an open position by displacement of a valve tappet (62, 132). The liquid outlet (22) is arranged on a front face (20) of the gun housing (12), and an actuating member (70, 22) for displacement of the valve tappet (62, 132) is arranged on a rear face (78) of the handle (28) facing away from the liquid outlet (22). In order to make further developments to the valve gun (10, 100, 120) such that the valve gun has a simpler design, according to the invention an actuating force can be applied by the actuating member (70, 122) to the valve tappet (62, 132) in the lower end region (32) of the handle (28).

Description

VALVE PISTOL FOR HIGH-PRESSURE CLEANING UNIT

The invention relates to a valve gun for a high-pressure cleaning device for the controlled release of a cleaning liquid, comprising a gun housing having a handle with a thumb and forefinger of the user associated upper end portion and a top end portion facing away from the lower end region, and with a gun housing in the flow path between a valve disposed having a closing body, which in a closed position on a valve seat tightly and is movable by moving a valve stem to an open position, wherein the liquid outlet is arranged on a front side of the gun housing, and wherein an actuating member for moving the valve tappet is arranged on a back side remote from the liquid outlet of the handle.

With the aid of such valve guns, the discharge of cleaning liquid which has been pressurized by a high-pressure cleaner can be controlled. The cleaning liquid used is preferably water, to which a cleaning chemical may be admixed. For example, a pressure hose can be connected to the liquid inlet of the valve gun and, for example, a spray lance can be connected to the liquid outlet of the valve gun. About the pressure hose of the valve gun pressurized cleaning liquid can be supplied, and on the spray lance, the cleaning liquid can be directed to an object.

To control the dispensing of fluid, the user can actuate an actuator of the valve gun and thereby open a valve disposed in the flow path between the fluid inlet and the fluid outlet. The actuator is mechanically coupled to a valve lifter which can be displaced by actuation of the actuator and thereby moves a closing body of the valve in an open position, in which the

Closing body takes a distance to a valve seat. In the open position of the closing body, the liquid inlet is in fluid communication with the liquid outlet. If the user releases the actuator, then the closure body returns to its closed position and interrupts the flow connection between the liquid inlet and the liquid outlet.

From the document GB 513 013 A a hand-controlled nozzle is known in which an actuating member is pivotally mounted on a liquid outlet and coupled via a toggle lever with a valve tappet. This requires a considerable design effort.

A valve gun is known from the document DE 603 17 447 T2, in which an actuating lever is pivotably mounted on a central region of the pistol housing and is coupled to a release lever pivotally mounted on the lower end region of the handle. The actuating lever is arranged as well as the release lever on the liquid outlet facing the front of the handle and can be operated by the user in the manner of a classic trigger lever with your fingers. Prolonged operation can lead to fatigue of the user. The use of two levers coupled together also makes the valve gun prone to failure and expensive.

From DE 34 31 800 AI a valve gun is known, in which the liquid inlet and the liquid outlet are arranged adjacent to the lower end portion of the handle. The actuator is designed as a hand lever, which is arranged on the liquid outlet facing the front of the handle and can be operated by the user with his fingers. As already mentioned, this can lead to fatigue of the user for a longer period of operation. A valve gun, in which the actuator is located on the back of the handle facing away from the liquid outlet, is known from US Pat

WO 2015/086085 AI known. The arrangement of the actuator at the back of the handle has the advantage that the user can operate the actuator with his palm, wherein the valve gun is pressed against the palm of the user under the influence of the recoil of the exiting the liquid outlet cleaning fluid. This facilitates the handling of the valve gun, as the user's fingers are relieved. The actuator is out of the document

WO 2015/086085 AI known valve pistol coupled via a coupling lever with the valve tappet.

Object of the present invention is to develop a valve gun of the generic type such that it has a simpler structural design.

This object is achieved in a valve gun of the type mentioned according to the invention that the valve stem from the actuator at a distance from the upper end portion of the handle with an actuating force can be acted upon.

In the case of the valve gun according to the invention, an actuating force can be transmitted from the actuating member to the valve tappet without the need for additional mechanical coupling elements. For this purpose, the valve tappet is acted upon at a distance from the upper end region of the handle by the actuating force exerted by the actuating member.

Preferably, the valve stem from the actuator in the direction of the lower end portion of the handle offset from the upper end portion acted upon by an actuating force.

It can be provided that the actuating member holds the valve stem in the lower end region of the handle or in the region of a protective bow of the pistol. lengehäuses acted upon by the actuating force. Between the guard and the handle, the valve gun can form a handle opening into which the user can engage with his fingers when grasping the handle.

The transmission of the actuating force from the actuator to the valve stem in an offset from the upper end portion of the handle portion of the gun body, in particular in the lower region of the handle or in the region of the guard allows, in combination with the arrangement of the actuator on the back of the handle a structurally simple and störungsunanfällige design of the valve gun, while still a fatigue-poor operation is possible.

The valve stem may be rigidly connected to the closing body of the valve. In particular, it can be provided that the valve stem is integrally connected to the closing body, so that the valve stem together with the closing body forms a common component, which may be made of metal, for example.

The closing body may for example be designed spherical or form a cone that can be moved by the valve stem from a closed position to an open position.

The valve is arranged in an advantageous embodiment of the invention, at least partially in the lower end region of the handle and / or in a subsequent to the lower end portion guard of the gun body. As already mentioned, the valve gun between a guard and the handle can form a handle opening, in which the user can engage with his fingers when grasping the handle. The valve may be at least partially, preferably completely, positioned in the lower end region of the handle or, for example, also in a transitional region between the lower end region of the handle and the safety bar or else completely in the protective bar. The valve preferably has a valve housing with a valve inlet and a valve outlet, wherein in the valve housing, the valve seat and the closing body are arranged and the valve outlet is connected via a drain line to the liquid outlet of the valve gun in flow communication. In such an embodiment, a drain line is arranged in the gun housing, through which the cleaning fluid from the valve outlet to the liquid outlet of the gun body can flow.

It can be provided that at least a portion of the drain line is arranged in the protective bracket of the gun body.

Alternatively or additionally, it can be provided that at least a portion of the discharge line is arranged in the handle of the pistol housing.

In particular, it can be provided that a portion of the drain line extends from the valve outlet to the upper end region of the handle. At this line section, another line section of the drain line can connect, which runs inside the gun housing.

Preferably, at least a portion of the drain line is designed as a pipe piece.

As already mentioned, an actuating force can be exerted on the valve tappet by the actuating member. It is advantageous if the actuating member has an applied to the valve tappet force application element. About the Kraftbeaufschlagungselement the valve stem can be acted upon with the actuating force to move the closing body of the valve in an open position. The Kraftbeaufschlagungselement may rest loosely on the valve stem.

In an advantageous embodiment of the invention, the actuating member on an actuating body, which in a rest position with a Fluid outlet facing away from the attachment area protrudes from the back of the handle remote from the liquid outlet and can be moved by the user with his palm in a release position, wherein the Kraftbeaufschlagungselement is arranged on the actuating body. If the operating body is moved by the user from the rest position into the release position, the force-applying element arranged on the actuating body exerts an actuating force on the valve tappet. This has the consequence that the valve stem moves the closing body of the valve in the open position.

The force-applying element may be configured, for example, in the form of a cam, a projection, a stop or a driver, or, for example, in the form of a receptacle into which the valve stem with an end facing away from the closing body is inserted.

The force-applying element is integrally connected in a preferred embodiment of the invention with the actuating body. It can be provided, for example, that the force-applying element together with the actuating body forms a one-piece plastic molded part.

Alternatively it can be provided that the Kraftbeaufschlagungselement forms a separate component which is fixed to the actuator body. The force-applying element may for example be designed in the form of a pin which is fixed to the actuating body.

The force-applying element can be held, for example, in a sleeve-shaped receptacle of the actuating body, in particular the force-applying element can be pressed into the sleeve-shaped receptacle.

Preferably, the Kraftbeaufschlagungselement is made of metal.

It is advantageous if the force-applying element is held adjustably on the actuating body. A particularly simple handling of the valve gun is achieved in an advantageous embodiment of the invention in that the actuating body is pivotable about a first pivot axis between the rest position and the release position back and forth. The actuator body forms in such an embodiment of a lever that can be pivoted by the user with the palm.

The actuator body may be pivotally mounted, for example, on the gun housing or on the valve housing.

It is advantageous if the first pivot axis is arranged in the lower end region of the handle. Such an arrangement has the consequence that the part of the operating body, which is located in the region of the thumb and forefinger of the user, occupies a considerable distance from the pivot axis. This allows the user to pivot the actuator body with rather little effort from the rest position into the release position.

In an advantageous embodiment of the invention, the actuating body forms a lever arm, on which are arranged in the rest position from the back of the handle projecting contact area and the Kraftbeaufschlagungselement. In such an embodiment, the actuating body is designed in the form of a one-armed lever. The actuating body forms a lever arm, on which both the contact area and the force-applying element are arranged. If the actuating body is pivoted from the rest position forward in the direction of the liquid outlet in the release position, the Kraftbeaufschlagungselement is pivoted in the same direction and exerts a pressure force on the valve stem. The closing body is thereby moved by the valve tappet in a direction away from the handle, wherein it lifts off the valve seat and releases the flow connection between the liquid inlet and the liquid outlet. Alternatively it can be provided that the actuating body forms a first lever arm and a second lever arm, wherein the rear in the rest position protruding from the handle contact area of the actuating body is disposed on the first lever arm and wherein the Kraftbeaufschlagungselement is arranged on the second lever arm. In such an embodiment, the actuating body is designed in the form of a two-armed lever. The first pivot axis is arranged between the force-applying element and the abutment region. If the actuating body is pivoted forward in the direction of the liquid outlet, the force-applying element is pivoted in the opposite direction and exerts a pulling force on the valve stem. The closing body is thereby moved by the valve tappet in a direction facing the handle, wherein it lifts off from the valve seat and the flow connection between the liquid inlet and the liquid outlet releases.

It is favorable if the actuating body has a thumb and forefinger of the user associated first end, wherein the distance of the Kraftbeaufschlagungselements from the first end is at least four times the distance occupied by the Kraftbeaufschlagungselement to the first pivot axis. Such a configuration results in very advantageous leverage ratios, so that the user can pivot the actuating body with relatively little effort around the first pivot axis and yet exerted by the Kraftbeaufschlagungselement a significant actuation force on the valve lifter.

It is advantageous if the closing body can be acted upon by moving the actuating body from the release position to the rest position with a closing force in the direction of the valve seat. In such a configuration, not only an actuating force for opening the valve can be exerted by the actuating body, but also an actuating force for closing the valve can be exerted by the actuating body. If the actuating body is moved from the rest position into the release position, an actuating force can be applied to the valve body via the force-applying element. Tappets are exercised, so that the valve stem moves the closing body in the open position. If the actuating body is moved out of the release position into the rest position, then an actuating force of this kind can be exerted on the valve tappet, preferably again via the force-applying element, so that the valve tappet moves the closing body into the closed position.

Conveniently, the valve gun comprises a return spring associated with the actuating body, which acts on the actuating body with a restoring force in the direction of the rest position. In such an embodiment, the user can move the actuating body against the restoring force exerted by the return spring from the rest position into the release position. If the user releases the actuating body, this is moved back into the rest position by the return spring assigned to the actuating body.

Preferably, the restoring force exerted on the actuating body during the transition from the release position to the rest position by the return spring can be transmitted via the force-applying element to the valve tappet so that the latter moves the closing body back into its closed position.

Alternatively or additionally, it may be provided that the closing body is movable from the closed position into the open position against the pressure of the cleaning liquid acting on it. If the actuating force exerted on the closing body via the valve lifter is omitted, the closing body automatically assumes its closed position again due to the pressure of the cleaning fluid acting on it.

It is advantageous if the valve has a closing spring which acts on the closing body with a closing force. In such a configuration, a movement of the closing body from the closed position into the open position takes place counter to the action of the closing spring. The valve stem is in such a configuration of the actuator with an actuating force acted upon to open the valve, which is greater than the closing force exerted by the closing spring on the closing body. If the actuating force of the actuating member is omitted, the closing body automatically assumes its closed position under the action of the closing spring.

In an advantageous embodiment of the invention, the valve gun on a movable between a locking position and an unlocking position locking member for locking the actuator. With the help of the locking member unintentional movement of the actuator can be prevented. When the locking member assumes its blocking position, it locks the actuating member so that the actuating member can not be moved relative to the gun housing. When the locking member assumes its unlocking position, the actuator is movable relative to the gun body.

It is particularly advantageous if the locking member is arranged on the front of the handle facing the liquid outlet. The user grips with his hand the handle of the gun body, he can intuitively move the arranged on the front of the handle locking member from the blocking position to the unlocking position, so that the user can then move the actuator to the valve stem with an actuating force to To open the valve to apply.

It can be provided that the locking member is slidably mounted on the gun housing. For example, the locking member may be mounted linearly displaceable.

In an advantageous embodiment of the invention, the locking member is pivotally mounted about a pivot axis associated with the locking member. This allows a structurally particularly simple embodiment of the valve gun. The locking member associated with the pivot axis is conveniently aligned parallel to the actuating member associated with the first pivot axis.

It is particularly advantageous if the pivoting axis associated with the locking element is arranged in the upper end region of the handle or in a region of the pistol housing which is adjacent to the upper end region of the handle. If the user grasps the upper end region of the handle with his thumb and forefinger, he can simultaneously pivot the locking member from the blocking position into the unlocking position. This allows a particularly simple handling of the valve gun.

In an advantageous embodiment of the invention, the locking member on an actuating arm and a locking arm, wherein the actuating arm protrudes in the blocking position of the locking member from the liquid sigkeitsauslass facing front of the handle and the Arretierungsarm blocked in the blocking position of the locking member movement of the actuator , The locking arm may rest in the blocking position of the locking member, for example, with its free end on the actuator or occupy a small distance to the actuator so that it can not be significantly moved by the user.

The locking arm and the actuating arm are conveniently aligned at an angle to each other.

It can be provided, for example, that the locking member is L-shaped, wherein the actuating arm forms a first leg and the locking arm forms a second leg of the locking member.

It is advantageous if the valve pistol has a return spring associated with the locking member, which acts on the locking member with a restoring force in the direction of the blocking position. Does the user give that Arretierungsglied free, so it automatically assumes its blocking position due to the restoring force acting on it, thus blocking movement of the actuator.

The following description of advantageous embodiments of the invention is used in conjunction with the drawings for further explanation. Show it :

Figure 1 is a schematic front view of a first advantageous embodiment of a valve gun;

Figure 2 is a sectional view of the valve gun along the line 2-2 in Figure 1;

Figure 3 is a sectional view corresponding to Figure 2 of a second advantageous

Embodiment of a valve gun;

Figure 4: a sectional view corresponding to Figure 2 of a third advantageous

Embodiment of a valve gun.

In FIGS. 1 and 2, a first advantageous embodiment of a valve gun according to the invention is shown schematically and is generally designated by the reference numeral 10. The valve gun 10 comprises a gun housing 12, which is formed by a first half-shell 14 and a second half-shell 16. The gun housing 12 has an elongate housing portion 18, on whose front side 20 a liquid outlet 22 is arranged. The liquid outlet 22 is designed in the form of an outlet bush 24, which carries an external thread 26. For example, a spray lance can be connected to the outlet bushing 24.

At a distance from the liquid outlet 22 is from the elongated housing portion 18 from a handle 28 from which the user can embrace by hand. The handle 28 has an integral with the elongated housing portion 18 and associated with the user's thumb and forefinger. Neten upper end portion 30 and the upper end portion 30 facing away, arranged at a distance from the elongated housing portion 18 and the small finger of the user associated lower end portion 32. A guard 34 extends from the lower end portion 32 of the handle 28 to the front 20 of the elongated housing portion 18. The guard 34, the elongated housing portion 18 and the handle 28 surround a handle opening 36, in which the user engages around the handle 28 with his fingers can intervene.

Adjacent to the lower end region 30 of the handle 28, a valve 38, which has a valve housing 40, is arranged in the protective bow 34. The valve housing 40 has a valve inlet 42, which is integrally connected to a projecting from the protective bracket 34 inlet bushing 44. The inlet bushing 44 forms a liquid inlet 46 of the valve gun 10 and carries an external thread 45. For example, a pressure hose can be connected to the inlet bushing 44, via which the valve gun 10 can be supplied with cleaning liquid which has been pressurized by a high-pressure cleaning device.

The through-bore 50 is aligned parallel to a longitudinal axis 51 of the outlet bushing 24 and extends into the lower end portion 32 of the handle 28 and is at its end remote from the lower end 32 by means of a sealing plug 52 tightly closed. An obliquely to the through hole 50 aligned pipe socket 54 opens at a distance from the sealing plug 52 into the through hole 50 and forms a valve outlet 56 from. At the valve outlet 56, a drain line 58 connects, which connects the valve outlet 56 with the liquid outlet 22. The drain line 58 extends within the guard bracket 34th

Between the valve inlet 42 and the pipe socket 54, the through hole 50 has a diameter constriction, which forms a valve seat 60. In the through hole 50, a valve stem 62 is slidably loaded Gert, which protrudes with a free end 64 in the lower end portion 32 of the handle 28 from the through hole 50 and which is integrally connected within the through hole 50 with a closing body 66. The closing body 66 is arranged in the through-bore 50 between the sealing plug 52 and the valve seat 60. By displacing the valve stem 62, the closing body 66 can be made from one shown in FIG

Closed position in which it rests tightly against the valve seat 60, are moved in the direction of the closure plug 52 in an open position in which it occupies a distance from the valve seat 60. The valve stem 60 has in its immediately adjacent to the closing body 66 adjacent area a circumferential annular groove 68. In the open position of the closing body 66, cleaning fluid can pass from the valve inlet 42 via the annular groove 68 and the pipe socket 54 to the valve outlet 56. If the closing body 66 assumes its closed position, the flow connection between the valve inlet 42 and the valve outlet 56 is interrupted.

In the handle 28, an actuating member 70 is arranged with an actuating body 74 and a fixed to the actuating body Kraftbeaufschlagungselement 80. The actuating body 74 is pivotally mounted on the handle 28 about an actuating body associated with the first pivot axis 72. The actuating body 74 protrudes with a contact area 76 facing away from the liquid outlet 22 from the rear side 78 of the handle 28 facing away from the liquid outlet 22. The first pivot axis 72 is arranged in the lower end region 32 of the handle 28. The force-applying element 80 is configured pin-shaped and arranged at a small distance from the first pivot axis 72 on the actuating body 74. It is fixed in a receiving sleeve 82 of the actuating body 74 and rests with its protruding from the receiving sleeve 82 end at the free end 74 of the valve stem 62. If the actuator 70 is pivoted about the first pivot axis 72 in the direction of the liquid outlet 22, so the force application member 80 exerts an actuating force on the valve stem 62 so that it within the through hole 50 of the valve housing 40 in Towards the direction of the closure plug 52 and thereby lifts the closure member 66 from the valve seat 60.

The actuating body 74 forms a lever arm 75, on which both the abutment region 76 and the force-applying element 80 are arranged. If the actuating body is pivoted about the first pivot axis 72 in the direction of the liquid outlet 22, the force-applying element 80 carries out a rectified movement and in this case acts on the valve tappet 62 with the actuating force.

The actuator body has a first end 77 associated with the thumb and forefinger of the user. The distance of the force-applying element 80 from the first end 77 is significantly greater than the distance that the force-applying element 80 to the first pivot axis 72 occupies. The distance of the force-applying element 80 from the first end 77 is at least four times, in particular at least six times, the distance occupied by the force-applying element 80 to the first pivot axis 72.

The actuator 70 is acted upon by a return spring 84 assigned to the actuator 70 with a restoring force.

The actuator 70 can be locked in its rest position shown in Figure 2. For this purpose, a substantially L-shaped locking member 85 is pivotally mounted about a second pivot axis 86 associated with the locking member in the upper end region 30 of the handle 28. A first leg 88 of the locking member 85 forms an actuating arm, which protrudes in the blocking position of the locking member 85 shown in Figure 2 from the liquid outlet 22 facing the front side 90 of the handle 28. A second leg 92 of the locking member 85 forms a locking arm, which rests in the blocking position of the locking member 85 with a free end 94 on the actuating body 74 and prevents it from pivoting. If the user grips the handle 28 with his hand, he intuitively pivots the locking member 85 counter to the resilient restoring force of a locking member 85 associated second return spring 96 in an unlocking position not shown in the drawing, in which the second leg 94 in a Recess 98 of the actuator body 74 is immersed, so that the actuator 70 can be pivoted from its rest position shown in Figure 2 about the first pivot axis 72 in the direction of the liquid outlet 22 in a release position, not shown in Figure 2. When pivoting from the rest position into the release position, as already mentioned, the valve stem 62 is displaced by the force application element 80 so far that the closing body 66 releases the flow connection between the fluid inlet 46 and the fluid outlet 22. If the user releases the actuating member 70 again, this is pivoted by the first return spring 84 back into the rest position, so that the force-applying element 80 no longer acts on the valve stem 62 with an actuating force. Under the effect of the pressure exerted by the cleaning liquid on the closing body 66, the closing body 66 is displaced together with the valve tappet 62 in the direction away from the closing stopper 52 so that the closing body 66 again assumes its closed position in which it seats on the valve seat 60 tight and thereby breaks the flow connection between the liquid inlet 46 and the liquid outlet 22.

FIGS. 3 and 4 schematically show a second and a third advantageous embodiment of a valve gun according to the invention. These embodiments are designed substantially identical to the first embodiment explained above with reference to FIGS. 1 and 2. For identical components, therefore, the same reference numerals are used in Figures 3 and 4 as in Figures 1 and 2 and to avoid repetition, reference is made to the above explanations with respect to these components. The second advantageous embodiment of a valve gun according to the invention shown schematically in FIG. 3 is designated overall by reference numeral 100. Of the valve gun 10 shown in Figures 1 and 2, the valve gun 100 mainly differs in that the valve 38 is disposed in the transition region between the lower end portion 32 of the handle 28 and the protective bracket 34. In particular, the valve outlet 56 of the valve housing 40 in the valve gun 100 occupies a position within the handle 28. The valve outlet 56 is connected to the liquid outlet 22 via a discharge line 102, wherein a first section 104 of the discharge line 102 adjoining the valve outlet 56 is arranged in the handle 28. The rectilinear first section 104 is adjoined angularly by a second section 106 of the discharge line 102, which is likewise rectilinear and opens into the outlet bushing 24, the second section 106 being arranged in the elongate housing region 18 of the pistol housing 12. Both the first return spring 84 and the second return spring 96 are based on the valve 100 at the first portion 104 of the drain line 102. When the actuator 70 of the valve gun is moved forward toward the fluid outlet 22, the first portion 104 dips into the actuator 70.

The actuating member 70 of the valve gun 100 can be pivoted from the rest position shown in Figure 3 about the first pivot axis 72 in the direction of the liquid outlet 22 in a release position, wherein the Kraftbeaufschlagungselement 80 of the valve gun 100, the valve stem 62 is acted upon by an actuating force under the action the valve stem 62 is moved together with the closing body 66 in the direction of the closure plug 52, wherein the closing body 66 assumes its open position and cleaning liquid from the liquid inlet 46 to the liquid outlet 22 can flow. If the user of the valve gun 100 releases the actuating member 70, it automatically assumes its rest position under the action of the first return spring 84, and the closing body 66 is moved into its closed position by the pressurized cleaning fluid. The third advantageous embodiment of a valve gun according to the invention shown schematically in FIG. 4 is designated overall by the reference numeral 120. In the above-explained valve guns 10 and 100, the actuator 70 has an actuator body 74 forming a one arm lever by the Kraftbeaufschlagungselement 80 is disposed on the same side of the first pivot axis 72 as the abutment portion 76. The actuator body 74 forms a lever arm 75 for this purpose on which the abutment region 76 and also the force application element 80 are arranged. As a result, when the actuating member 70 is pivoted, the force-applying element 80 is pivoted in the same direction as the abutment region 76. In contrast to this, in the case of the valve-type pistol 120 shown in FIG. 4, an actuating element 122 having an actuating body 124 is used which has a two-armed lever formed. The actuating member 122 of the valve gun 120 is pivotable about a first pivot axis 126 which is arranged between a contact area 128 of the actuating member 122 projecting from the rear side of the handle 28 and a force-applying element 130 connected to the actuating body 124. The actuating body 124 has a first lever arm 129 and a second lever arm 131. At the first lever arm 129 of the contact area 128 is arranged, and the second lever arm 131, the force-applying element 130 is arranged. From Kraftbeaufschlagungselement 130, a valve lifter 132 can be acted upon with both a compressive force and a tensile force. For this purpose, the force-applying element 130 engages in an annular groove 134, which is arranged on the free end region of the valve tappet 132 facing the actuating body 124.

If the actuator 122 of the valve gun 120 is pivoted about the first pivot axis 126 forward in the direction of the liquid outlet 22 in a release position from the rest position shown in Figure 4, the valve stem 132 and with this also integrally connected to the valve stem 132 closing body 136th shifted in the direction away from the plug 52 direction back, wherein the closing body 136 lifts from a valve seat 138 and thereby the flow connection between the liquid inlet 46 and the liquid outlet 22 releases. If the user of the valve gun 120 releases the actuator 122, this is pivoted by the first return spring 84 back to the rest position, wherein the force exerted by the first return spring 84 restoring force is transmitted via the Kraftbeaufschlagungselement 130 on the valve stem 132 and the closing body 136, so the closing body 136 assumes its closed position on the valve seat 138, in which it interrupts the flow connection between the liquid inlet 46 and the liquid outlet 22.

The handling of the valve pistols 10, 100 and 120 is done by the user with little effort. For this purpose, the positioning of the actuators 70 and 122 contributes to the liquid outlet 22 remote from the rear side of the handle 28, since the discharge of pressurized cleaning liquid from the cleaning liquid to the valve guns 10, 100, 120 applied recoil the valve guns 10, 100 and 120th Presses against the palm of the user, so that the user's fingers are relieved. To relieve the user also contributes that the actuation of the valve stem 62, 132 takes place with the actuating force of the force application elements 80, 130 at a distance from the upper end portion 30 of the handle 28, because this leads to favorable power ratios. The distance between the force-applying elements 80 and 130 to the first end of the actuating body 74 and 124 facing the elongated housing area 18 is chosen to be significantly greater than the distance that the force-applying elements 80, 130 to the first pivot axis 72, 126 occupy. As already mentioned, the distance between the force-applying elements 80, 130 and the first end of the actuating body 74, 124 is at least four times as large as the distance between the force-applying elements 80, 130 and the first pivot axes 72, 126. Due to the resulting favorable leverage ratios For example, the actuators 74, 124 may be pivoted about the first pivot axes 72, 126 with relatively little force, and yet relatively large actuation forces may be exerted on the valve lifters 62, 132 by the energizers 80, 130.

Claims

P A T E N T A N S P R E C H E

Valve gun for a high-pressure cleaning device for the controlled dispensing of a cleaning fluid with a pistol housing (12) having a handle (28) with a user's thumb and forefinger associated upper end region (30) and the user's little finger associated lower end region (32) and a valve (38) arranged in the pistol housing (12) in the flow path between a liquid inlet (46) and a liquid outlet (22), which has a closing body (66, 136) which in a closed position lies close to a valve seat (60 , 138) and is movable by moving a valve stem (62, 132) into an open position, wherein the liquid outlet (22) on a front side (20) of the pistol housing (12) is arranged, and wherein an actuating member for displacing the valve stem (62 , 132) is arranged on a liquid outlet (22) facing away from the rear side (78) of the handle (28), dadur Ch characterized in that the valve stem (62, 132) from the actuating member (70, 122) at a distance from the upper end region (30) of the handle (28) can be acted upon by an actuating force.

Valve gun according to claim 1, characterized in that the valve stem (62, 132) in the direction of the lower end region (32) of the handle (28) offset from the upper end portion (30) can be acted upon with an actuating force.

Valve gun according to claim 1 or 2, characterized in that the valve (38) at least partially in the lower end region (32) of the handle (28) and / or in a subsequent to the lower end region (32) guard (34) of the gun housing ( 12) is arranged.

4. Valve gun according to claim 1, 2 or 3, characterized in that the valve (38) comprises a valve housing (40) having a valve inlet (42) and a valve outlet (56), wherein the valve seat (60, 138) and the closing body (66, 136) are arranged in the valve housing (40), and wherein the valve outlet (56) via a drain line (58, 102) is in fluid communication with the liquid outlet (22).

5. Valve gun according to claim 4, characterized in that at least a portion of the drain line (58) in the protective bracket (34) is arranged.

6. Valve gun according to claim 4 or 5, characterized in that at least a portion of the drain line (102) in the handle (28) is arranged.

A valve gun according to claim 6, characterized in that a portion (104) of the drain line (102) extends from the valve outlet (56) to the upper end portion (30) of the handle (28).

8. Valve gun according to one of the preceding claims, characterized in that the actuating member (70, 122) to the valve stem (62, 132) can be applied Kraftbeaufschlagungselement (80, 130).

9. Valve gun according to claim 8, characterized in that the actuating member (70, 122) has an actuating body (74, 124) which in a rest position with a liquid outlet (22) facing away from abutment area (76, 128) from the back (78 ) of the handle (28) and can be moved by the user with the palm of a hand in a release position, wherein the Kraftbeaufschlagungselement (80, 130) on the actuating body (74, 124) is arranged.

10. Valve gun according to claim 9, characterized in that the Kraftbeaufschlagungselement (130) with the actuating body (124) is integrally connected.

11. Valve gun according to claim 9, characterized in that the Kraftbeaufschlagungselement (80) forms a separate component which is fixed to the actuating body (74).

12. Valve gun according to claim 9, 10 or 11, characterized in that the actuating body (74, 124) about a first pivot axis (72, 126) between the rest position and the release position is pivotable back and forth.

13. Valve gun according to claim 12, characterized in that the first pivot axis (72, 126) in the lower end region (32) of the handle (28) is arranged.

14. Valve gun according to claim 12 or 13, characterized in that the actuating body (74) forms a lever arm (75), on which the abutment region (76) and the Kraftbeaufschlagungselement (80) are arranged.

15. Valve gun according to claim 12 or 13, characterized in that the actuating body (124) a first lever arm (129) and a second lever arm (131) is formed, wherein the abutment region (128) on the first lever arm (129) is arranged, and wherein the force-applying element (130) is arranged on the second lever arm (131).

16. Valve gun according to one of claims 9 to 15, characterized in that the actuating body (74, 124) has a thumb and forefinger of the user associated with the first end (77), wherein the distance of the Kraftbeaufschlagungselements (80, 130) from the first At least four times the distance that the force loading element (80, 130) to the first pivot axis (72, 126) occupies.

17. Valve gun according to one of claims 9 to 16, characterized in that the closing body (136) by moving the actuating body (124) from the release position into the rest position with a closing force in the direction of the valve seat (138) can be acted upon.

18. Valve gun according to one of claims 9 to 17, characterized in that the valve pistol (10, 100, 120) has an actuating body (74, 124) associated with the return spring (84), the actuating body (74, 124) with a restoring force applied in the direction of the rest position.

19. Valve gun according to one of the preceding claims, characterized in that the valve pistol (10, 100, 120) between a locking position and an unlocking position movable back and forth locking member (85) for locking the actuating member (70, 122).

20. Valve gun according to claim 19, characterized in that the locking member (85) on the liquid outlet (22) facing the front side (90) of the handle (28) is arranged.

21. Valve gun according to claim 19 or 20, characterized in that the locking member (85) about a locking member (85) associated pivot axis (86) is pivotally mounted.

22. Valve gun according to claim 21, characterized in that the locking member (85) associated pivot axis (86) in the upper end region (30) of the handle (28) or in an upper end region (30) of the handle (28) adjacent region of Pistol housing (12) is arranged.

23. Valve gun according to one of claims 19 to 22, characterized in that the locking member (85) has an actuating arm and a locking arm, wherein the actuating arm in the blocking position of the locking member (85) from the liquid outlet (22) facing the front side (90 ) of the handle (28) and the locking arm in the blocking position of the locking member (85) blocks movement of the actuating member (70, 122).

24. Valve gun according to one of claims 19 to 23, characterized in that the valve gun (10, 100, 120) has a the locking member (85) associated return spring (96), the locking member (85) with a restoring force in the direction of the locked position applied.