DE8702559U1 - Gravity cup with variable air supply for paint spray guns - Google Patents

Description

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Kurt Meschenmoser .* ; · | ; ·"■ · ·"» .' Glgastr. 2-4 ' "' '·■' ·'

7992 Tettnang, 05 May 1987

To the

German Patent Office
Zweibrückenstr. 12

8000 Munich 2

Description

Gravity cup with variable air supply for paint spray guns.

This innovation relates to the spraying of paints or similar from paint spray guns with a paint container (gravity cup) attached to the top of the paint spray gun.

When spraying paint from paint spray guns with a gravity cup, ^air must be able to flow through the top of the lid to replace the amount of paint that has flowed down into the gun, so that no negative pressure is created and only little or no paint flows further.

State of the art:

There is a corresponding hole in the lid of the flow cup. Air can flow through this hole. This arrangement has the disadvantage that when the paint spray gun is moved, paint comes out of the hole and drips from the flow cup and falls onto surfaces that have already been painted, contaminating them.

Or a recess is made in the lid of the gravity cup, which has a hole at the bottom for the air supply. A hollow plug is inserted into this recess, which usually has a hole on the side in the upper part or a tube attached to the side, which ensures that air is supplied through the hole into the recess in the cup. These plugs can be rotated so that the opening of the side hole or the opening of the tube can be turned into the most favorable position. This arrangement allows air to flow in and the path of the paint from the gravity cup to the outside is made much more difficult. However, even here, paint leaking out cannot be prevented, as the movements during spraying (strong angle of inclination of the gun, violent movements throwing the liquid upwards and in all directions) cause the hollow space in the

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Plugs are filled with paint and this paint is thrown out through the hole on the side or the tube when there is a violent movement and then also contaminates the parts that have already been painted. This dripping of paint during the spraying process is very disadvantageous because very often already finished parts (e.g. bonnets, roofs of vehicles) have to be repainted because of this contamination.

Further disadvantages of such arrangements can be seen in the following:

These holes or openings in the tubes must be large enough to ensure trouble-free operation even with the largest paint nozzles that can be used (strong material flow and materials that stick together quickly). This means that with the smallest nozzles (very thin materials, materials that stick together less), there are unnecessarily large openings for the air supply, which increases the risk of paint leaking out.

In addition, it is difficult to check before starting the spraying work

whether such a hole or tube is completely open and thus enables trouble-free work. Is the tube or hole is stuck or clogged Appropriate tools for piercing and cleaning should be at hand.

The innovation described here of a flow cup with variable air supply for paint spray guns has the following advantages over the state of the art:

a) The cross-section of the air supply can be adjusted by the user with one hand during the work process from max. Large can be continuously adjusted down to zero. This means that adaptation to all conditions is possible at any time.

b) A stop is provided for a normally used average cross-section of the air duct. If the plug is pushed in as far as it will go, this average cross-section is created.

c) After removing the plug, it is very easy to check whether the external air duct is open or blocked.

d) An eventual, stuck channel can be cleaned without special tools, with a knife, fingernail or similar.

These advantages over the state of the art are achieved by the flow cup with variable air supply for paint spray guns consisting of:

The hollow plug (1) is made primarily of plastic from the polyolefin family, with a grip edge (2) with a marking (3) for the indentation, the indentation (5) which is slanted on one side and vertical on one side in the stop edge (4). As well as the air channel (6) which is located on the outer part of the lower plug (1), is conical and tapers from bottom to top and ends at zero in front of the stop edge (4).

The recess (7) in the lid of the flow cup ^, which ^is also _mainly made of plastic, ^from the family of poly olefins ^,

is placed, with a hole (B) at the lower end of the recess and the stop pin (9) which is attached to the upper edge of the recess.

Functional description of the gravity cup with variable air supply for paint spray guns»

The plug (1) is pressed into the recess (7) on the lid until it rests on the stop edge (4) with the stop pin (9). Now an average cross-section for the air supply is created from the interior of the plug (1) through the conical air channel (6). If I now turn the plug (1) on the handle edge (2) until the marking (3) on the one-sided slanted indentation reaches the stop (9), I can press the plug (1) further along the slope until finally the stop (9) hits the vertical side of the indentation (5), the plug (1) is completely pressed in and the conical air channel is closed.

If I turn the plug (1) back, the plug (1) rises along the slope of the recess (5), the air channel (6) opens accordingly up to the middle cross-section, whereby the stop (9) again rests on the lower edge of the stop edge (4).

If I pull the plug (1) out even further, the air channel (6) opens to the maximum cross-section.

t.xt This flow cup with variable air supply for paint spray guns allows the optimum setting to be made at any time and the air passage to be closed off for a short time. Now no more paint can come out of the inside of the plug (1), even if it is completely filled with paint and the gun is being moved violently in all directions. If the flow of paint decreases when the air supply is closed, I only need to turn the plug (1) back a little using the handle edge (2) to reach the best setting.

With this flow cup with variable air supply for paint spray guns, difficult painting work can be carried out with the greatest possible safety against dripping paint.

Tettnang. 05.M

Kurt Mescfvenmoser . &igr; ' &iacgr;&iacgr;&iacgr;&iacgr; ' &iacgr;&idigr;

till·

Olgastr. 4

7992 Tettnang, 05 May 1987

To the

German Patent Office Zweibrückenstr. 12

8000 Munich 2

List of reference symbols for the drawing of a gravity cup with variable air supply for paint spray guns.

1.) Plug hollow.

2.) Grip edge.

3.) Marking.

4.) Stop edge on the plug.

5.) Indentation in the stop edge of the plug, one-sided oblique, one-sided vertical.

6.) Conical air channel starting at the outer edge of the lower plug, tapering to zero at the top, installed laterally offset from the indentation.

7.) Recess in the lid of the gravity feed gun.

8.) Hole at the bottom of the recess.

9.) Stop pin at the upper edge of the recess.

lettnang, 05 May 1987

Claims (3)

Characterized in that it consists of the following parts: 1.) Made from a hollow plug (1) predominantly made of plastic from the polyolefin family, with a grip edge (2), the stop edge (4) with the indentation (5) which is slanted on one side and vertical on the other, and the air channel (6) which is located on the outer edge in the lower part of the plug (1), is conical and tapers upwards until it ends at zero in front of the stop edge (4). 2.) Or another arrangement of a flow cup with variable air supply for paint spray guns, characterized in that a thread is attached to the air plug and a conical section is attached. 3.) Flow cup with variable air supply for paint spray guns, characterized in that a stop (9) is attached to the lid of a flow cup with variable air supply for paint spray guns, which serves as a stop for a specific, otherwise variable, cross-section of an air duct. Tettnang, 05 May 1987