DE202019102440U1 - Hand-operated spray device with material inlet ducts on both sides for alternating attachment of a material supply device - Google Patents

Abstract

Hand-operated spray device (1), in particular a paint spray gun, preferably a paint spray gun that atomizes through air, at least one
- a base body (2), on the underside (3) of which a handle (4) protrudes,
- A nozzle arrangement (5) for atomizing a spray liquid, in particular a coating material, which is attached to the front side (6) of the base body (2),
- and a material inlet channel (7, 8) for the fluid-conducting connection of a material supply device (9) to the nozzle arrangement (5), the base body (2) having an upper side (10) opposite the lower side (3) and two opposite side surfaces (11, 12) ) which each connect the top (10) to the bottom (3), and wherein the material inlet channel 7 is formed on one of the side surfaces (11) of the base body (2), characterized in that a second material inlet channel (8) on the other side surface (12) of the base body (2) is formed.

Description

The invention relates to a hand-operated spray device, in particular a paint spray gun, preferably a compressed air atomizing paint spray gun according to the preamble of claim 1.

State of the art

A generic spray device in the form of a hand-operated paint spray gun is for example in the patent application US 2014/0312146 A1 disclosed. The previously known paint spray gun is a so-called side cup paint spray gun. This has the advantage that the view of a user essentially parallel to the material jet and above the paint spray gun is not blocked by a paint cup connected to the paint spray gun, in that the paint cup can be arranged on the side of the paint spray gun. In particular, it is from the US 2014/0312146 A1 known spray device around a paint spray gun, which is designed for use with the left hand of a user. For this purpose, the base body is provided with a material inlet channel on the right-hand side surface - viewed in the direction of the front nozzle arrangement of the paint spray gun.

A disadvantage of such a paint spray gun is that, although it is advantageously designed for operation by a left-handed person, it is less suitable for operation with the right hand of a user, that is to say for a right-handed person.

The object of the present invention is to provide a paint spray gun to which a material supply device can be connected to the side and which can be used equally by a right-hander as well as a left-hander.

To achieve this object, a spray device, preferably a paint spray gun, advantageously a paint spray gun that atomizes through air, with the features of claim 1 is proposed.

The spray device has at least one base body, on the underside of which a handle preferably protrudes. A nozzle arrangement for atomizing a spray liquid, preferably a coating material, is provided on the front side of the base body. The base body has an upper side which is opposite the underside of the base body. The top and bottom of the base body are connected by two opposing side surfaces. For the mutual connection of a material supply device, the side surfaces have a first material inlet channel on one of the side surfaces of the base body and a second material inlet channel on the other, opposite side surface of the base body.

The structure described enables use of the paint spray gun by both right-handed and left-handed people. All that is required is to remove the side cup from the left or right side of the paint spray gun and attach it to the opposite side. It should be noted that the right side of the spray gun is the side surface that, when used as intended, with the right hand points in the direction in which the back of the user's hand is also pointing. The left side of the spray gun is the opposite side surface that, when used as intended, with the right hand, points in the direction of the thumb and thus essentially towards the user's body. When used by a left-handed person, the left side of the paint spray gun points in the direction in which the back of the user's hand also points, with the right side of the paint spray gun pointing towards the thumb or essentially towards the body of the user.

According to the invention, the conversion of the lateral material supply device from one side of the paint spray gun to the other is also as convenient as possible.

Another advantage of the paint spray gun according to the invention is that no different work steps are necessary between the production for a right-handed side cup paint spray gun and a left-handed side cup paint spray gun.

The described configuration also makes it possible to attach two material supply devices, in particular side cups, to a paint spray gun at the same time, it being possible for the material supply devices to be attached to the opposite side surface of the spray device. It is also conceivable here for the paint spray gun to be supplied with different spray liquids by the two material supply devices, which are mixed within the paint spray gun.

The invention is preferably an air atomizing paint spray gun. In particular, the material nozzle of the nozzle arrangement is surrounded by an annular gap which is connected in a fluid-conducting manner to a fluid source for an atomizing medium. Will the spray device with compressed air operated, compressed air forms the atomizing medium. Apart from compressed air, other gaseous media can also be used as atomizing media. Furthermore, a corresponding paint spray gun has a trigger which, apart from the delivery of the spray liquid, also controls the delivery of the atomizing medium or the required compressed air.

In order to ensure that no material is released before the atomization medium emerges at the annular gap, when the trigger is operated, the fluid flow of the atomization medium to the annular gap is preferably opened first and only then the material nozzle. The fluid flow of the atomizing medium at the annular gap creates a negative pressure around the material nozzle which, in addition to the effect of gravity, conveys the material to be sprayed from the cup to the material nozzle and then out of the material nozzle. After exiting, the compressed air exiting the annular gap atomizes the material into many small particles, which form a directed jet of material that is directed away from the spray device towards a workpiece to be coated.

The main body of the spray device is preferably a forged metal part, but it can also be cast or made of another material. An aluminum alloy is preferably used for weight reasons.

The upper side of the paint spray gun is the side of the paint spray gun that connects both side surfaces and is arranged opposite the handle. The underside is the side of the paint spray gun that is opposite the upper side and connects the two side surfaces with one another, with the handle directly adjacent to the underside or, when used as intended, extends from the underside towards the floor.

A handle is connected to the base body, the handle preferably being formed in one piece with the base body. The handle also has side surfaces, these directly adjoining the side surfaces of the base body. Furthermore, the planes of the side surfaces of the base body and the planes of the side surfaces of the handle are preferably essentially identical, the adjoining surfaces of the handle and the base body together forming the respective side surfaces of the spray device.

According to the invention, the nozzle arrangement is attached to the front of the spray device, with the front of the spray device pointing away from the user when the user is holding the paint spray gun in his hand as intended. The front connects both the side surfaces and the top and bottom of the paint spray gun.

The spray jet of the atomized spray material emerges at the nozzle arrangement when the spray device is actuated, the spray jet being directed away from the user. The spray jet defines a spray direction that is directed along the exiting spray jet, away from the user when the spray device is used as intended, towards the workpiece that is to be coated by means of the spray device.

The nozzle arrangement can be designed in various ways, depending on the type of sharpening device. Preferably, both horn air nozzles and control nozzles are provided.

The spray liquid is usually a coating material such as a varnish or paint. However, the coating material can also be a food such as icing or the like, with which a food is coated. Apart from liquid media that are used for coating, solid media can also be used that are either in powder form or are initially solid and liquefied by heating.

The material inlet channels in the main body serve to firmly connect one or more material supply devices to the main body and to form a fluid-tight connection between the material supply device and the material outlet of the material nozzle.

In a preferred embodiment, both material inlet channels lead from the corresponding side surface to the center plane of the spray device, the center plane preferably being located centrally between the side surfaces of the spray device. In the area of the center plane, both material inlet channels meet with a central material channel that leads to the material nozzle in the spray direction. The material nozzle can be closed by a material needle, which is arranged essentially coaxially to the material nozzle and the central material channel and is guided along the central plane through the base body.

The material channel preferably narrows to a smaller diameter in the direction that is opposite to the spray direction after it has met the material inlet channels. From the narrowing of the material channel, the channel only serves to guide the material needle and no longer carries any spray liquid. Accordingly, can the material channel from this constriction, seen against the injection direction, can be referred to as the needle guide channel. In order to ensure that no spray liquid enters the needle guide channel, it must be sealed to guide the spray liquid to the channels. For this purpose, a seal is provided between the material needle and the narrowed material channel within the needle guide channel in the direction opposite to the injection direction, after the point of intersection between the material inlet channels and the material channel.

The invention also includes so-called airless or air-mix paint spray guns which do not have an annular gap for atomizing the material, but rather atomize the material using a high material pressure.

In one variant of the invention, the material supply is implemented via a hose that is connected to a pressure vessel or a high-pressure pump and provides a material pressure of more than 100 bar. The spray liquid is then fed into the paint spray gun and discharged from the paint spray gun through a so-called single-fluid pressure nozzle and shaped into a fan shape through the shape of the nozzle outlet. The interaction with the ambient air then creates shear forces, the action of which then results in a fine atomization of the spray liquid.

In the variant of the invention in the form of an air-mix paint spray gun, as with air-atomizing paint spray guns, preferably horn air nozzles are also available, depending on the model, in order to influence the spray jet in a manner comparable to an air-atomizing paint spray gun.

In the variant of the invention in the form of an airless paint spray gun, there is no compressed air supply. It is therefore only supplied with the spray liquid. Here, after the spray liquid exits the material nozzle, the spray jet is no longer influenced by horn air nozzles or control nozzles. In this variant, the spray jet is formed only by the shape of the outlet area of the material nozzle, which is preferably designed in the form of a slot, both with the airless paint spray gun and with the air-mix paint spray gun.

The spray device preferably has at least one material supply device which, among other things, is designed as a flow cup. In this case, the material to be sprayed is guided into the paint spray gun by means of the action of gravity via a fluid-tight channel and there is guided to the nozzle arrangement, in particular to the material nozzle, with the spray liquid emerging at the material nozzle. In another embodiment, the material supply device is designed as a hanging cup or material supply hose.

Unlike the gravity cup, the hanging cup is located on the underside of the paint spray gun, whereby the spray liquid is transported to the material nozzle by the suction effect. The suction effect is created, for example, by the negative pressure around the material nozzle when the atomizing medium emerges at the annular gap. Such hanging cups can also be subjected to pressure to support the suction effect, by means of which the spray liquid is conveyed to the material nozzle via a suction tube that extends to the bottom of the hanging cup.

A material supply hose is connected to a material reservoir, which is under pressure, for example, whereby the spray liquid is guided through the hose to the spray device.

In principle, the material supply device in the operating state, regardless of its configuration, is connected in a fluid-conducting manner to the nozzle arrangement or the material outlet of the material nozzle by means of the first or the second material inlet channel. The fluid-conducting connection is preferably designed in such a way that, apart from the outlet at the material nozzle, no material can escape from the fluid-conducting areas.

Because the material supply device can optionally be attached to the left or right side of the spray device, there is the possibility that the spray device can be used by both right-handed and left-handed people. All that is required is to change the material supply device from one side of the spray device to the other.

If the material supply device is a material supply hose, changing the connection side can also serve to adapt to the spatial conditions. For example, it can be a hindrance if the material supply hose is attached to one side of the spray device, but the material reservoir is placed on the opposite side of the spray device.

In the case of a preferred exemplary embodiment, an adjusting valve, preferably in the form of a round / wide-jet adjusting valve, is provided, the adjusting valve being adjustable both by means of a first adjusting element and by means of a second adjusting element. Here, the first setting element is located on one of the side surfaces of the base body and the second setting element is located on the opposite side surface of the base body. Because on both side surfaces of the Spray device an adjustment element is provided, it is possible for the user to operate the adjustment valve with the hand with which the user holds the spray device, regardless of whether the user is holding the spray device in the right or left hand. It is therefore not necessary to reach around, which means that the setting valve can be operated by both right-handed and left-handed users during operation.

In order to influence the shape of the exiting material jet, the spray device according to the invention preferably additionally has various control nozzles and horn air nozzles which compress the material jet from an essentially round shape in cross section to an oval shape in cross section. This is done, among other things, by the horn air nozzles, which are located in so-called horns, which protrude from the nozzle arrangement in the direction of the atomized material, the horn or horns being arranged at a distance from the material nozzle on a circular path around the material nozzle.

A preferred variant of the invention designed as a compressed air atomizing paint spray gun is equipped with two horns, the two horns facing each other with respect to the material nozzle. Each of the horns can be equipped with one or more horn air nozzles, the horn air nozzles pointing at the axis of the material nozzle at an angle pointing away from the paint spray gun in order to influence the material jet accordingly. This arrangement compresses the originally round jet of material into an oval shape in cross section. Furthermore, additional control nozzles can be provided, which also influence the jet in a positive manner.

Depending on the application, either a round jet or an elliptical material jet is required. For this purpose, in a preferred variant of a sharpening device according to the invention, the adjusting valve is provided, with which the fluid flow exiting at the horns can preferably be regulated. If the fluid flow to the horn air nozzles is blocked by the adjusting valve, in particular by a round / wide jet adjusting valve, the originally round material jet is not influenced, so it remains circular in cross section. When the fluid flow through the horn air nozzles increases, the original round jet is increasingly compressed into an elliptical shape and takes on an elliptical or oval shape in cross section, which is advantageous for many applications. The material jet is aligned in such a way that the short mirror axis of the ellipse is essentially parallel to the connecting axis of the horn air nozzles.

In order to make it easier for the user to operate the paint spray gun, the round / wide jet adjustment valve is designed in such a way that the user can adjust the valve while carrying the paint spray gun in his hand. For this purpose, the valve is attached to the paint spray gun in such a way that, in the case of the hand-held paint spray gun, it is on the side facing the body and can be actuated with the user's thumb.

The round / wide-jet adjusting valve is preferably constructed in such a way that a pressure distribution chamber is provided in the base body, which is supplied with the atomizing medium via a feed line in the handle. The pressure distribution chamber is connected to at least one atomizer line and at least one control line. The atomizer line is fluidly connected to an annular gap on the nozzle arrangement that surrounds the material outlet nozzle. The control line is fluidly connected to at least the at least one horn air nozzle on the nozzle arrangement. An adjusting valve is also provided, which protrudes into the pressure distribution chamber and is designed in such a way that both the volume flow of the atomizing medium that flows from the pressure distribution chamber to the atomizer line and the volume flow of the atomizing medium that flows from the pressure distribution chamber to the control line can be adjusted, at least in some areas.

The setting valve protrudes through the base body of the spray device and is connected in the area of the two side surfaces of the spray device, or the base body, to one setting element each in such a way that the setting valve can be actuated by both setting elements. Both setting elements are located in the area of the side surfaces that can be reached with the thumb when the spray device is operated as intended, so that the control valve can be operated both with the thumb of the right hand and with the thumb of the left hand when the spray device is in the associated hand is held.

It is particularly advantageous if the material inlet channels for connecting to the material supply device are each provided with a connection receiving device, the connection receiving device preferably being an internal thread. Furthermore, a sealing surface extending within the material inlet channels and encircling the axis of the material inlet channels can be provided, the circumferential sealing surface preferably being a sealing cone.

The material inlet channels preferably each have a connection receiving device such as a thread, so that none additional parts are required. An internal thread also offers the advantage that it can easily be introduced into the material supply channels during manufacture of the spray device and is protected there against damage from the outside. A sealing surface within the material inlet channels is also easy to manufacture by means of bores with different diameters. Apart from that, such a sealing surface, preferably designed as a sealing cone, can easily be cleaned of the spray liquid.

In a further advantageous embodiment, in addition to the material supply device, a closure device, in particular in the form of a closure plug, is provided with which an unused material inlet channel can be releasably closed. In this case, the closure device preferably has a central projection which protrudes essentially in the axial direction, which protrudes with respect to a circumferential counter-sealing surface of the closure device and into which protrudes into the material inlet channel. The circumferential counter-sealing surface is preferably a counter-sealing cone which, for sealing, interacts with the sealing surface in the material inlet channels or, preferably, with the sealing cone.

This embodiment offers the advantage that the material inlet channel, which is not connected to a material supply device, can be closed with the closure device. Because it is preferably a detachable attachment, the property of the spray device is retained that it can be used by both right-handed and left-handed people without loss if the material supply device is attached to a side surface and the opposite material inlet channel with the Closure device is closed.

Because the closure device preferably has a central projection protruding essentially in the axial direction, which protrudes in front of and into the material inlet channel with respect to the circumferential counter-sealing surface of the closure device, the dead space between the closure device and the material channel can be reduced or completely eliminated. For this purpose, the central projection preferably extends to the end of the material inlet channels without protruding into the material channel. By sealing by means of a sealing cone and a counter sealing cone, a seal that is particularly easy to produce can be created.

In a further advantageous embodiment, the spray device has a connection device of a material supply device, which serves to connect the material supply device, in particular releasably, to one of the material inlet channels. The connecting device and the (remaining) material supply device can be designed as separate, preferably detachable components. For example, the connection device can be designed in the form of a separate connection adapter. The connecting device can, however, also be permanently connected to a material supply device or be a fixed part of a material supply device.

The connecting device advantageously has a circumferential counter-sealing surface, preferably in the form of a counter-sealing cone, the counter-sealing surface being arranged on the end face of the connecting device. The connecting device preferably also has an external thread that is designed to match the connection receiving device (internal thread) of the material supply channels and is used for releasable connection therewith.

Furthermore, the connecting device can be provided with a lock nut which has an internal thread that is designed in such a way that it can interact with the external thread of the connecting device in such a way that a form-fitting screw connection is formed. Unlike the closure device, the connection device does not have a projection which extends into the material inlet channel.

The counter-sealing surface of the connection device interacts with the sealing surface of the material inlet channels in a manner comparable to that of the counter-sealing surface of the closure device. Thus, the sealing surface of the material inlet channels and the counter-sealing surface of the connecting device meet when the connecting device is screwed into the material supply channel, whereby a connection that is externally fluid-tight is created.

The sealing surface of the material inlet channels and the counter-sealing surface of the connecting device are preferably designed as a sealing cone or counter-sealing cone. Such a seal via corresponding cones has the advantage that it is self-centering, whereby the seal is facilitated and is less prone to errors, even if the sealing cone and / or the counter-sealing cone are easily damaged. Advantageously, the sealing cone and the counter-sealing cone are designed in such a way that, in the assembled state, they only touch on a circumferential line, which enables greater tolerances in production compared to surface contact.

In a preferred embodiment of the invention, a lock nut is provided, wherein the lock nut is screwed onto the external thread of the connecting device before the connecting device with the external thread is screwed into the internal thread of the material inlet channels. The connecting device is screwed into the material inlet channel so far that the sealing surface meets the counter-sealing surface and is secured with the lock nut. This prevents the connecting device from coming loose. Among other things, this is particularly advantageous because the material supply device must not become detached from the spray device and should always be attached at the same angle to the base body or to the direction of the material jet. Should the connecting device come loose, a side cup can rotate essentially freely around the axis of the material inlet channels, which can lead to its contents being inadvertently emptied. Furthermore, such a lock nut enables such a connection to be established without the need for another screw locking device, such as an adhesive that is introduced into the thread between the connecting device and the material inlet channels, which would prevent the material supply device from being converted.

If the connecting device is designed as a separate component, the connecting device on the side facing away from the spray device is preferably provided with an inner cone which interacts with an outer cone on the material supply device to create a fluid-tight, self-centering connection between the connecting device and the material supply device to accomplish.

In order to ensure that the spray device is supplied with spray liquid, the connecting device is provided with a central bore which extends through the connecting device from the counter-sealing cone to the inner cone. The spray liquid is thus fed from the material supply device into the central bore of the connecting device. From there, the spray liquid enters the material inlet channel, then the spray liquid is fed into the material channel, from where the spray liquid enters the material nozzle and leaves the spray device at the material outlet.

In a further preferred exemplary embodiment, the sealing surfaces of the respective material inlet channels are made of metal.

In a further advantageous embodiment, the spray device comprises a connection device of a material supply device and preferably a closure device, the closure device and the connection device each being provided with a counter-sealing surface, preferably made of metal. The counter-sealing surface is designed in such a way that it rests in a linear, circumferential manner only in the area of a sealing surface of the material inlet channels facing the central plane of the spray device, the central plane of the spray device preferably running centrally between the opposite side surfaces.

The sealing surfaces and the mating sealing surfaces of the material inlet channels, as well as the closure device and the connection device, are preferably formed in one piece with the respective component. This structure has the advantage of facilitated manufacture, with no additional parts being required. Apart from that, such seals are advantageously designed as a conical seal. This has the advantage that these are particularly resistant to corrosion and do not have to be regularly replaced like seals made of other sealing material.

The sealing line runs particularly advantageously on that part of the conical seals facing the central plane, since this can prevent spray liquid from penetrating into the conical seal and possibly no longer making a seal possible.

An embodiment is particularly advantageous in which both material inlet channels are designed in the same way so that a connection device of a material supply device that can be connected directly to the first material inlet channel or a closure device can optionally also be connected directly to the second material inlet channel. This ensures that both the locking device and the connecting device can be attached on both sides.

The external thread of the connecting device is preferably designed to be identical to the external thread of the closure device. Furthermore, the cones of the material inlet channels are designed identically and the counter-cone of the closure device and the counter-cone of the connecting device are designed identically.

In this way, the user can advantageously convert the spray device from a right-handed configuration to a left-handed configuration and vice versa by simply exchanging the connecting device and closure device, without great effort. Another particularly advantageous aspect is that the production of right-handed paint spray guns and left-handed paint spray guns is standardized, as a result of which the production costs, in particular for left-handed paint spray guns, can be reduced.

A further advantageous embodiment of a spray device additionally comprises a projection which surrounds the material inlet channels. The projections are preferably designed in such a way that they project outward from the respective side surfaces of the base body, away from the spray device. The projections are preferably formed in one piece with the base body and are preferably located in the area of offset flanks which are arranged on the side surfaces of the base body.

The offset flanks are formed here by a narrowing of the base body, the side surfaces of the base body being set back inward in the direction opposite to the injection direction. In this case, the angle between the side surface resting on the offset flank and the offset flanks is more than 90 °, preferably more than 110 °. As a result, the offset flanks, viewed in the spray direction, extend over a certain area of the associated side surfaces. In addition, the side surfaces in the area that lies in front of the offset flanks as seen in the spraying direction are designed to be round, whereas the side surfaces after the offset flanks are designed to be flat. The offset flanks thus serve to narrow the body, which can thereby be more easily grasped by the user, and a transition from an essentially round nozzle arrangement and the essentially flat base body.

A configuration of the material inlet channels in which the first and second material inlet channels extend along the same axis is particularly advantageous.

The common axis of the material inlet channels is preferably aligned such that it is aligned essentially parallel to the floor when the spray device is held in such a way that there is an angle of 90 ° between the floor and the side surface of the handle or the base body. This also has the advantage that the material supply device is at the same height on both side surfaces when the spray device is held as intended.

In a particularly preferred embodiment, the spray device according to the invention has a material needle with which a material outlet nozzle of the nozzle arrangement can be closed. The material inlet channels are preferably mirrored around the axis of this material needle and are thus designed to be congruent. This results in the easy interchangeability of the closure device and the connection device, or thus also the material supply device connected by means of the connection device.

The axis of the material inlet channels and the axis of the material needle preferably intersect. The axes particularly preferably intersect at a right angle.

Furthermore, it is particularly advantageous if both the material channel, which is coaxial with the material needle, and the material inlet channels, have the same diameter. As a result, a shoulder at the transition between the material inlet channel and the material channel can be avoided, as a result of which the cleaning of the parts of the spray device carrying spray liquid is facilitated.

A variant in which the material inlet channels are formed by a common opening in the base body is advantageous from a manufacturing point of view, the opening running from one of the side surfaces to the other of the side surfaces of the base body and preferably perpendicular to the center plane of the spray device. This allows the opening to be manufactured with the aid of a single through-hole in the base body and thus reduces the manufacturing effort and, accordingly, the manufacturing costs.

• 1 eine erfindungsgemäße Spritzvorrichtung in einer perspektivischen Ansicht aus einer ersten Blickrichtung,
• 2 die Spritzvorrichtung gemäß 1 in einer perspektivischen Ansicht aus einer zweiten Blickrichtung,
• 3 die Spritzvorrichtung gemäß 1 mit einem linksseitig angeschlossenen Farbbecher,
• 4 die Spritzvorrichtung gemäß 1 mit einem rechtsseitig angeschlossenen Farbbecher,
• 5 eine Schnittansicht der Spritzvorrichtung gemäß 1 im Bereich eines Einstellventils,
• 6 eine Schnittansicht der Spritzvorrichtung gemäß 1 im Bereich von Materialeinlasskanälen und
• 7 ausschnittsweise eine Schnittansicht der Spritzvorrichtung gemäß 1 entlang einer Mittelebene des Grundkörpers.

The invention is explained below with the aid of exemplary embodiments. The figures show:

• 1 a spray device according to the invention in a perspective view from a first viewing direction,
• 2 the spray device according to 1 in a perspective view from a second viewing direction,
• 3 the spray device according to 1 with a paint cup connected on the left,
• 4th the spray device according to 1 with a paint cup attached on the right,
• 5 a sectional view of the spray device according to 1 in the area of an adjusting valve,
• 6th a sectional view of the spray device according to 1 in the area of material inlet channels and
• 7th a fragmentary sectional view of the spray device according to FIG 1 along a central plane of the base body.

The 1 and 2 show a perspective view of a spray device 1 . At 1 it is a perspective view showing essentially the right side surface 11 the spray device 1 shows. In the perspective view in 2 becomes essentially the left side face 12 the spray device 1 shown.

With the spray device shown 1 it is preferably a paint spray gun, in particular a paint spray gun that atomizes through air. The spray device 1 has a base body 2 on, at the bottom 3 a handle 4th protrudes. Next is a nozzle arrangement 5 for atomizing a spray liquid, in particular a coating material. The nozzle arrangement 5 is at the front 6th of the main body 2 , preferably releasably attached.

The spray device 1 has first and second material inlet channels 7th , 8th on, these each for the fluid-conducting connection of a, in 3 and 4th material supply device shown 9 with the nozzle arrangement 5 serve. The main body also has 2 the spray device 1 one of the bottom 3 opposite top 10 and two opposite side surfaces 11 , 12 on. The side faces 11 , 12 of the main body 2 each connect the top 10 of the main body 2 with the bottom 3 of the main body 2 . The side surfaces of the spray device 1 consist of the side surfaces 11 , 12 of the main body 2 and the side surfaces of the handle connected to it 35 , 36 . A first material inlet channel 7th is on one of the side faces 11 of the main body 2 and the second material inlet channel 8th on the other side 12 of the main body 2 intended.

3 and 4th show a perspective view of a spray device 1 , with an exemplary material supply facility 9 that here as a gravity-feed cup 13 is designed. Here is in 3 a perspective view of a spray device 1 shown in the material supply device 9 on the left side surface 12 the spray device 1 is appropriate. Accordingly shows 3 a configuration of the spray device 1 for use by a left-handed person. 4th shows a spray device 1 with a material supply device 9 the one on the right side face 11 is connected. Thus the in 4th Spray device shown 1 suitable for right-handed use.

In the 3 and 4th material supply device shown 9 can be used as the gravity-feed cup shown 13 be designed, but also a hanging cup (not shown) or a material supply hose (also not shown) as a material supply device 9 can be provided. The material supply facility 9 can optionally by means of the first or the second material inlet channel 7th , 8th fluid-conducting with the nozzle arrangement 5 get connected. The first material inlet channel is located here 7th on the in 1 essentially shown right side of the spray device 1 and the second material inlet channel 8th on the in 2 essentially shown left side of the spray device 1 . This shows the right side of the spray device 1 when holding the spray device as intended 1 by a right-hander, on the palm side, whereas the left side of the sprayer 1 then pointed towards the user's thumb.

As from the 1 to 4th can be seen are the material inlet channels 7th , 8th such on the side surfaces 11 , 12 the spray device 1 placed so that it is in the area of offset flanks 21st , 22nd the side faces 11 , 12 of the main body 2 are located. The spray device 1 tapers, seen against the spray direction, on both side surfaces 11 , 12 to the effect that both side faces 11 , 12 an offset edge 21st , 22nd have on which the side surfaces 11 , 12 to the middle plane 39 are offset. Here is the angle between the offset flanks 21st , 22nd and one in 2 sketched median plane 39 the spray device 1 preferably greater than 90 °.

In 5 is a sectional view of the main body 2 shown, the section being coaxial with the adjustment valve 14th the spray device 1 and perpendicular to the side faces 11 , 12 runs, the adjustment valve 14th in this case in the form of a round / wide-jet adjusting valve. The adjusting valve 14th penetrates the main body 2 from one of the side faces 11 , 12 to the other, wherein a first and a second adjustment element 15th , 16 are provided, each with the adjustment valve 14th are connected. Thus is the adjusting valve 14th both by means of a first adjustment element 15th as well as by means of a second adjustment element 16 operable. Here is the first adjustment element 15th on one of the side faces 11 of the main body 2 and the second adjustment element 16 on the opposite side face 12 of the main body 2 arranged. This arrangement allows the setting elements 15th , 16 can be adjusted without reaching around with that hand of a user with which the user operates the spray device 1 holds, regardless of whether the user is using the sharpening device 1 with the right or left hand. The adjustment is preferably carried out with the thumb of said hand. The shown, round / wide jet adjustment valve 14th serves to control the air flow that flows through the horn air nozzles 37 or the annular gap 38 and the control nozzles on the nozzle assembly 5 emanates.

6th shows a sectional view of the base body 2 the spray device 1 , the section through the axis of the two material inlet channels 7th , 8th and perpendicular to the side faces 11 , 12 runs. The material inlet channels 7th , 8th are to be connected to the material supply facility 9 each directly with a connection receiving device 25th , 26th , preferably an internal thread, and preferably one within the material inlet channels 7th , 8th circumferential sealing surface 27 , 28 Mistake. Here are the sealing surfaces 27 , 28 preferably designed in the form of a sealing cone. Apart from that, there are the sealing surfaces 27 , 28 the material inlet ducts 7th , 8th preferably made of metal.

There is also a locking device 18th the spray device 1 shown, which is designed in particular in the form of a sealing plug. With the locking device 18th , an unused material inlet duct can 7th , 8th be releasably closed. This locking device 18th has a central protrusion 29 on, the opposite of a circumferential mating sealing surface 33 , essentially in the axial direction of the closure device 18th , protrudes and into the fluid inlet channel 7th , 8th protrudes. Here is the circumferential counter-sealing surface 33 preferably designed as a counter-sealing cone.

Next is a connecting device 30th the material supply facility 9 for connecting to one of the material inlet channels 7th , 8th shown, the material supply device 9 is not shown here. The connection device shown 30th has a circumferential counter-sealing surface 32 and preferably a lock nut 31 on. The counter sealing surface 32 is on the front of the connecting device 30th arranged and preferably designed in the form of a counter sealing cone.

The connection device shown 30th the material supply facility 9 and the locking device 18th are designed so that they each have a counter-sealing surface 32 , 33 , preferably made of metal, is provided, which is designed such that it is only in the area on a sealing surface 27 , 28 the material inlet ducts 7th , 8th , preferably a sealing cone, rests in a line-like manner on the central plane 39 the spray device 1 is facing. The middle plane runs here 39 the spray device 1 preferably in the middle between the opposite side surfaces 11 , 12 , how 2 can be found.

The material inlet channels 7th , 8th are designed in the same way, so that one is attached to the first material inlet channel 7th connectable connecting device 17th a material supply facility 9 and / or closure device 18th optionally also directly to the second material inlet channel 8th is connectable. The material inlet channels 7th , 8th preferably extend along the same axis 40 , like in the 6th is shown.

Out 6th can also be seen that the material inlet channels 7th , 8th each from a ledge 19th , 20th are surrounded by the respective side surfaces 11 , 12 of the main body 2 protrudes outward, the projections 19th , 20th preferably in one piece with the base body 2 are trained. The material inlet channels 7th , 8th run along one and the same central axis 40 .

In 7th Figure 3 is a cross-sectional view of a spray device 1 along the median plane 39 shown taking a material needle 23 is present with which a material outlet nozzle 24 the nozzle arrangement 5 can be locked. In the 3 Material inlet channels shown in more detail 7th , 8th , are around the central axis 40 the material needle 23 mirrored, designed the same. Furthermore, the central axis intersect 40 the material inlet ducts 7th , 8th and the axis 41 the material needle 23 preferably perpendicular.

The material channel also shown 34 extends from, the median plane 39 the spray device 1 facing end of the material inlet channels 7th , 8th until the beginning of the material outlet nozzle 24 and thus connects the material supply facility 9 via a central hole in the connecting device 17th , the material inlet duct 7th , 8th and the material channel 34 with the material outlet nozzle 24 , with the spray liquid in connection with the spray device 1 at the outlet of the material outlet nozzle 24 leaves.

Like both from 7th as well as from 6th can be seen are the material inlet channels 7th , 8th through a common opening in the main body 2 educated. This breakthrough runs from one of the side surfaces 11 to the other of the side surfaces 12 of the main body and is perpendicular to the central plane 39 the spray device 1 aligned.

QUOTES INCLUDED IN THE DESCRIPTION

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Patent literature cited

• US 2014/0312146 A1 [0002]

Claims (14)

Hand-operated spray device (1), in particular a paint spray gun, preferably a through-air atomizing paint spray gun, at least comprising - a base body (2) on the underside (3) of which a handle (4) protrudes, - a nozzle arrangement (5) for atomizing a spray liquid, in particular a coating material , which is attached to the front (6) of the base body (2), - and a material inlet channel (7, 8) for fluid-conducting connection of a material supply device (9) to the nozzle arrangement (5), the base body (2) being one of the underside ( 3) has opposite upper side (10) and two opposite side surfaces (11, 12) which each connect the upper side (10) to the underside (3), and wherein the material inlet channel 7 on one of the side surfaces (11) of the base body (2 ) is formed, characterized in that a second material inlet channel (8) is formed on the other side surface (12) of the base body (2) i st. Spray device (1) after Claim 1 , characterized in that the spray device (1) has at least one material supply device (9), which is designed in particular as a flow cup (13) and / or hanging cup and / or material supply hose, the material supply device (9) optionally by means of the first or second material inlet channel (7, 8) can be connected to the nozzle arrangement (5) in a fluid-conducting manner. Spray device (1) according to one of the preceding claims, characterized in that the spray device (1) has an adjusting valve (14), preferably in the form of a round / wide jet adjusting valve, the adjusting valve (14) both by means of a first adjusting element ( 15) as well as by means of a second setting element (16), and wherein the first setting element (15) on one of the side surfaces (11) of the base body (2) and the second setting element (16) on the opposite side surface (12) of the base body (2) is arranged and can therefore be adjusted without reaching around with that hand of a user with which the user is holding the spray device (1), regardless of whether the user is holding the sharpening device (1) with his right or left hand. Spray device (1) according to one of the preceding claims, characterized in that the material inlet channels (7, 8) for connecting to the material supply device (9) each with a connection receiving device (25, 26), preferably an internal thread, and / or one within the material inlet channels (7, 8) circumferential sealing surface (27, 28), preferably in the form of a sealing cone, are provided. Spray device (1) according to one of the preceding claims, characterized in that the spray device (1) comprises a closure device (18), in particular in the form of a closure plug, by means of which an unused material inlet channel (7, 8) can be releasably closed, wherein the closure device (18) preferably has a central projection (29) which protrudes essentially in the axial direction and which protrudes from a circumferential counter-sealing surface (33) of the closure device (18), preferably in the form of a counter-sealing cone, and into the material inlet channel (7 8) protrudes. Spray device (1) according to one of the preceding claims, characterized in that the spray device (1) comprises a connecting device (30) of a material supply device (9) for connecting to one of the material inlet channels (7, 8), the connecting device (30) being a lock nut (31) and / or comprises a circumferential counter-sealing surface (32), preferably in the form of a counter-sealing cone, the counter-sealing surface (32) being arranged on the front side of the connecting device (30). Spray device (1) according to one of the preceding claims, characterized in that the material inlet channels (7, 8) each have a sealing surface (27, 28) made of metal. Spray device (1) according to one of the preceding claims, characterized in that the spray device (1) has a connection device (30) of a material supply device (9) and / or a closure device (18), each with a counter-sealing surface (32, 33), preferably made of metal, which is designed in such a way that it rests linearly on a sealing surface (27, 28) of the material inlet channels (7, 8) only in the area facing the central plane (39) of the spray device (1), wherein the central plane (39) of the spray device (1) preferably runs centrally between the opposite side surfaces (11, 12). Spray device (1) according to one of the preceding claims, characterized in that the material inlet channels (7, 8) are designed in the same way, so that a connection device (17) of a material supply device (9) and / or closure device ( 18) can optionally also be connected directly to the second material inlet channel (8). Spray device (1) according to one of the preceding claims, characterized in that the Material inlet channels (7, 8) are each surrounded by a projection (19, 20) which protrudes outward from the respective side surfaces (11, 12) of the base body (2), the projections (19, 20) preferably being integral with the base body (2) are formed and / or are preferably arranged in the area of offset flanks (21, 22) of the side surfaces (11, 12) of the base body (2). Spray device (1) according to one of the preceding claims, characterized in that the first and second material inlet ducts (7, 8) extend along the same axis (40). Spray device (1) according to one of the preceding claims, characterized in that a material needle (23) is provided with which a material outlet nozzle (24) of the nozzle arrangement (5) can be closed, and the material inlet channels (7, 8), mirrored around the Axis (41) of the material needle (23) are designed the same. Spray device (1) according to one of the preceding claims, characterized in that a material needle (23) is provided, by means of which a material outlet nozzle (24) of the nozzle arrangement (5) can be closed and the axis (40) of the material inlet channels (7, 8) cut the axis of the material needle (23), preferably perpendicularly. Spray device (1) according to one of the preceding claims, characterized in that the material inlet channels (7, 8) are formed by a common opening in the base body (2), which runs from one of the side surfaces (11) to the other of the side surfaces (12) of the base body (2) and preferably perpendicular to the central plane (39) of the spray device (1).

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