DE2051822A1 - - Google Patents

Description

Dipl.-Ing.W.Beyer Dipl.-Virtsch.-Ing.B.Jochem

6000 Frankfurt am Main Freiherr-vom-Stein-Str. 18th

Atlas Copco
Aktiebolag
Nacka / Sweden

Spray gun

Priority of the Swedish patent application no. 14 951/69 of October 31, 1969

The invention relates to a spray gun, for example a paint spray gun, to which by means of one of two interacting coupling parts existing quick release a supply hose I can be connected for a working fluid.

"In this context, the term working fluid Compressed gas, usually compressed air, for atomizing and entrainment of a material to be sprayed or this itself can be understood. So far it was the compressed air hose, which was usually provided with a coupling part of a quick release, and its construction was such that on the one hand the total weight of the spray gun due to the weight of the individual parts of the quick release was enlarged considerably and, on the other hand, theirs at the same time

At 8149 /2o.1o.197o ·

109819/1242

Mobility and handling were made difficult because of the quick release formed an additional extension or stiffening of the pistol handle, the connection end of the hose or one other part of the spray gun,

It is the object of the present invention to create a spray gun of the type mentioned at the outset which is lighter in weight and is easier to handle than the previously known designs. ;

The above object is achieved according to the invention in that the The coupling part belonging to the quick release on the P hose side is part of the grip area of the pistol handle and contains a valve which is preloaded in the closing direction and which is fixed to the spray gun when the coupling parts are joined together attached.Control member is obviously.

The invention is illustrated below with reference to a 'in the drawing Embodiment explained in more detail ·. Show it:

1 shows a longitudinal section through a spray gun according to the invention,

Fig. 2 'is a broken away side view of the handle

j ■

the spray gun,. '

FIG. 5 shows a cross section through the handle according to FIG. 2 according to section line 3-3,.

FIG. 4 shows a side view of the spray gun according to FIG. 1, also a supply hose for a working fluid has been removed

Fig. 5 is a partially sectioned side view of the terminal end of the removed supply hose.

At 8149 / 2o.1o.197o

10981071242

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The spray gun shown in 'the drawing is divided into ^a gun housing 1o and a handle 11, it is operated with compressed air. A spring-loaded compressed air valve 12 is provided with a valve rod 13 which, in order to open the valve, is displaced downwards by means of a trigger 14 with reference to FIG. The pusher 14 is pivotably mounted on a hinge pin 8 fixedly attached to the housing Io and carries an inner angle lever 15, via which firstly the valve rod I3 is depressed and secondly a valve body 16, spring-loaded in the closing direction, which closes or releases the spray opening of the gun 'The opening direction is shifted. In the direction of flow behind the compressed air valve 1.2 there is an adjusting valve, denoted overall by 17, with which a secondary air flow directed from the side against the sprayed jet can be set. In this way the character of the spray jet can be changed. The compressed air is fed to the spray gun through a hose 18. This is at the end of a sleeve-shaped connection piece which forms part of the grip area of the pistol handle

19 (See Fig. 4), which is firmly attached to the gun body connected is.

The material to be sprayed, e.g. paint, is fed through a hose

20 supplied, which is provided at the connecting end with a coupling part designated as a whole by 21. In the pierced couplings ä averaging part 21 is a hole formed in the manner of a nonreturn valve shut-off valve with a ball 23 of the pressed material to be sprayed against a seat 22 in the uncoupled state of Fig. 5 by a spring 24 in the direction of flow. The valve is closed in this state. The valve seat 22 is formed by a row of sealing rings 26 arranged axially one behind the other, which are fixed by a plug 25. A filter 27 can also be built into the coupling part 21.

Before the connecting piece forming one half of the handle part 19 is a tube 28 in a parallel position on the gun housing 1o

At 8I49 / 2o.1o.197o

109819/1242

attached, which can be pushed into the sealing rings 26 when the coupling part 21 is slipped on, namely so deep that the ball 24 is pushed away from its seat 22 into the position according to Pig-1. The sealing rings 26 surround the pipe 28 absolutely tightly. Now there is a connection between the hose 2o and a chamber Jo for the spray material via the opened valve in the coupling part 21, the pipe 28 and inner channels in the gun housing Io, from where this is discharged via a spray nozzle when the valve body 16 is in the opening direction wird- moved in the coupled state ,, that is, when the clutch member is pushed onto the tube 28 21, it completes the handle, _w i _{e from} fig, seen and thereby has a certain guidance and a stop on the connecting piece 19 by; namely the coupling part 21 in the ■ cross section according to Fig. 3 ^ ine the diameter of the connecting piece, corresponding, has longitudinally extending indentation 51 Side around the connection piece 19 and the coupling part 21 is clamped.

During the operation of the spray gun, the hose 2o is with his Coupling part 21 connected as shown in Fig. 1, and the operator holds the pistol grip 11, i.e. the connecting piece 1'9 and the coupling part 21, in one hand and can thereby the Push-button 14 to open the spray nozzle to a greater or lesser extent actuate. When the quick release, the coupling of the hose 2o forms, is to be released, the spring clip 52 is in the in Fig. 3 is opened in broken lines and the coupling part 21 is pulled off the tube 28. In this position shown in FIG. 5, it closes the valve 22, 23 the hose 2o and prevents paint from being poured out. If you can use a large number with the same pistple want to spray different spray materials, e.g. different Colors, and if so, each color container has its own Has a hose connection with a coupling part 21, it is sufficient to simply change the color of the hose 2o and coupling part 21 to remove one of the paint containers from the spray gun and those to put on another desired paint container. At 8149 / 2o.1o.197o

100019 / 1242- claims

Claims (5)

'! Swill »I.»'! ■ I'11 'lllj' '■' "'" I1' '"; ■" ■ ■ f' '' "'1 ^ 11" 1'! "! ILiIiIIi-11 -! JI.! - '| !! 11 j 11! 11! "'".:!: ■■■■;:!: ■: ■■!: !! | i | l | llj |! J! Jl 1! 11 "1 !! 1 ! 11! 111 !! 111 !! 1! 11! IaINiI1JI ,; "■ 1 1I; ■ '■■ -SI,' Millji-", ...,, .. claims 1.) Spray gun to which one of two interacting Coupling parts existing quick release a supply hose for a working fluid can be connected, characterized in that the coupling part (21) on the side of the hose (2o) is part of the grip area of the pistol handle (11) and is preloaded in the closing direction Valve (22, 23, 24) contains which when joining the coupling parts (19, 21, 28, 32) by a fixed on the spray gun (9.) attached control member (28) is evident. 2 «Spray gun according to claim 1 _: characterized in that the valve (22, 23, 24) is designed in the manner of a check valve and closes in the direction of flow of the working fluid, and that the control member (28) has a tube (28) attached to the gun housing (io) ), which when the coupling parts are joined together, 'sealed on the outer circumference, can be inserted through the valve seat (22) into the valve (22, 23, 24) so that it opens and a connection (3o ) is made up to the spray nozzle of the gun. 3-spray gun according to claim 1 or 2, characterized in that the tube (28) on the gun housing (1o) arranged in front of a handle part (I9) firmly connected to this is, with which the latter together the hose-side coupling part (21) forms the pistol handle (11). 4. Spray gun according to claim 3, d a d u r c h characterized, that the firmly attached handle part (19) is a connection piece for a compressed air line and the quick At 8149 / 2o.1o.197o 109819/1242 Closure (21, 28, 5% 32) for coupling a supply hose (20) is used for the material to be sprayed, the hose-side Coupling part (21) along one side an indentation (31) has, with which it partially engages around the connecting piece (19 ") in the coupled state and is supported on this. 5. Spray gun according to claim 4 »thereby ge indicates that the hose-side coupling part (21) in the coupled state with the connecting piece (19) by means of a spring clip (32) can be clamped. At 8149 / 2o.1o.197o 109819 / 12U Blank page