DE6902763U - CHECK VALVE - Google Patents

Description

Herae, ...., _{8000 Munich 2} 3,

Frelligrath size 1? IN »_ I ■ _'-. B LJ D - U _ Eisenacher Strasse 17

P.O. Box 140 Dipl.-Ing. RH Bahr _{Pa,. Anw Betller}

PaL-Anw. Herrmann-Trentepohl Dipl.-PtiVS. EdliafCl ΒθΙΖίβΓ Telephone: 39 8011

Telephone: 5 09 30 ^r * 398012

sis «Dipl.-Ing. W. Herrmann-Trentepohl ⁵⁹⁸⁰¹⁵

Telegram address . ... _ _ Telegram address:

Bahrpatente Herna PATENTANWÄLTE Babetzpat Munich

Telex 08 229 853 Telex 05 245 42

I bank accounts:

Bayrische Vereinsbank MUnchen 952287 Dresdner Bank AG Herne 202 436 Postal checking account Dortmund 558 68

L J

checking account Dor

2 4th year Wed

^{Ref- :} M01 368 B / il

please indicate in the answer

Please send a letter to:

IITOESIT INDUSTRIA ELETTRODOMESTICI ITALIANA S.p.A., Orbassano (Turin), Italy ■

"Check valve"

The innovation is directed to a check valve and is particularly, but not exclusively, concerned with a check valve for use in dishwashers.

E; he task of the innovation is to create a check valve to see which liquid line can close even under very low pressure.

The check valve according to the innovation is characterized by the combination of a hollow housing with at least an outlet, a separately arranged cover with a central inlet, a deformable one between the housing and Cover arranged membrane, which has a rigid central part with a movable valve member with a the valve seat surrounding the lid cooperates, wherein the membrane further has a plurality of holes in a

Has arrangement around the rigid central part so that liquid can enter the housing from the inlet as soon as it is the valve is open.

Check valves designed according to the invention are simple, strong and "cheap to manufacture and also light and easy to assemble.

The innovation is to be described below with reference to the drawings, for example.

The drawings show in:

1 shows an axial section through a new valve according to the invention; and in

According to the drawings, the check valve has a housing 1 with a hollow molded body made of plastic with a lateral Outlet 2 and axial outlet 3 for a liquid or other flowing medium.

The housing 1 is at the upper end with an annular Flange 4 is provided with a cover 5 fastened by screws 6. The cover 5 has a central inlet 7 which is connected to an inner bore and is surrounded by an annular edge 13, which acts as a valve seat serves.

An elastically deformable membrane 6, preferably made of rubber or a similar material, is between the lid 5 and the flange 4 attached. The membrane 8 has an annular enlarged edge 9 on its outer circumference

Fig. 2 is an enlarged plan view of part of the valve of Fig. 1. ^

for inserting and holding the membrane 8 between the valve

housing 1 and the cover 5. The membrane 8 is also provided with a central thickened part 10, which thereby it is reinforced that a stiffening member 11, which is preferably made of plastic, is placed on a surface attaches.

The stiffening member 11 is on the surface of the membrane 8, which faces towards the hollow interior 15 of the housing, while the other surface of the membrane 8 cooperates with the edge 13 so that the central part works as a valve member.

In an annular arc, several through-bores 12 are arranged in the membrane 8 concentrically around the central reinforced part 10, so that the flowing medium or the liquid can flow in the permitted direction, ie from the inlet 7 into the housing interior 15 when the valve is open. If liquid is fed to the valve through the inlet 7 in the cover 5, then S ⁴ Ih deforms the membrane 8 under the pressure of the liquid in such a way that the central part 10 lifts off the valve seat edge 13 and the valve opens. The liquid then flows into the space 14 between the cover 5 and the membrane 8, through the holes 12 and reaches the interior 15 of the housing 1, where it exits through one of the outlets 2 or 3.

If liquid is allowed to flow in the opposite direction through one of the two outlets 2, 3 into the housing 1, then the liquid pressure acts on the membrane 8 and • moves the middle part 10 of the same, so that this is on the edge 13 and seals with this. This closes the valve and creates a flow in the direction of the inlet 7 in the cover 5 prevented.

As a result of the extended central area 10 of the membrane 8, a moderate liquid pressure is sufficient for the displacement the membrane 8 in the direction of closing the valve.

The valve according to the innovation can advantageously be used in dishwasher machines Use for working in places where the main water pressure is comparatively low.

- Protection claims: -

Claims (5)

- 5 - M 01 368 B / il Indesit Industria .... Protection claims 1. Check valve characterized by the combination of a housing (1) with at least one iü Outlet (2, 3), a separately attached cover (5) with a central inlet (7) »one between the housing (1) and the lid (5) attached deformable membrane (8) with a rigid central part (10) as a movable Valve member acts and cooperates with a valve seat (13) which surrounds the inlet (7) in the cover (5), wherein the membrane further has a series of holes (12) around the rigid central part (10) through which the liquid passes flows from the inlet (7) into the housing (1) when the valve is open. 2. Check valve according to claim 1, characterized in that that the deformable membrane (8) with an outer enlarged annular edge (9) is provided for inserting and holding the outer edge of the membrane (8) between the cover (5) and the valve housing (1). 3. Valve according to claim 1 or 2, characterized geke / nnzeich that the rigid central part (10) of the membrane (8) thickens with respect to the flexible part of the membrane is. 4. Check valve according to claim 3, characterized that the thickened central part (10) of the deformable membrane (8) by a disk-like Stiffening member (11) is reinforced, which exposed to the side of the Meirbran (8) facing the interior (15) of the valve housing (1). 5. Check valve according to one or more of the preceding claims, characterized in that the housing (1) and the cover (5) are made of plastic.