DE2756689A1 - CLOSURE FOR EXPANSION VESSELS - Google Patents

Description

Dlpl.-Phy ». UM detention · monks 22. den

Maxlmillanstrasse 15 Tel. 294818 2756689

Patent attorney Maxlmillanstr. 15th

Compagnie des Produits Industrieis de L'Ouest, B.P. 1226, 44023 Nantes Cedex

Closure for expansion vessels

The present invention relates to a closure for expansion vessels, in particular for the cooling system of motor vehicles. where a negative pressure or an overpressure can occur.

Such closures are usually provided with valves, the opening of which is controlled by pretensioned springs. However, this type of closure is relatively complex and expensive. Furthermore, the results obtained are not always reproducible to the predetermined values, for what purpose the conditions of use, in particular the temperature at which the Device must work, contribute.

It should be noted as a further disadvantage that pressure drops occur within the required pressure levers.

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Bank details: Commerzbank Munich BL2 70040041, account no. 37203 » S. W. I. F. T. - Code COBADEFF 700: Postscheckamt MOnchen, Account No. 33831-801

The object of the present invention is to provide a closure for expansion vessels that is simple in its construction and its assembly which is cheap, reliable and which avoids the above-mentioned drawbacks.

This problem is solved with those specified in claim 1 Features.

Advantageous embodiments of the closure according to the invention are described in the subclaims.

In the following the invention is explained in more detail with reference to the drawing, in which a preferred embodiment is shown. Show it:

Figure 1 is a bottom view of a closure according to the invention;

Figure 2 is a vertical section through the closure through its flaps and

Figure 3 is an enlarged view of a closure according to the invention used flap.

The closure according to the invention is essentially by a Molded piece 1 is formed, which advantageously by molding a synthetic thermoplastic material, for example of the type Polyacetal, is obtained and in which at least two flaps 2, 3 made of synthetic or natural elastomer are used. As Figure 2 shows, the cast molding 1 consists of a cover part, which extends on its periphery in a perpendicular to it Wall passes, the interior of which has a thread 4; the horizontal surface of the cover part is provided with openings 5, 6, which serve the gas exchange between the two spaces on each side of the closure.

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Furthermore, openings 7 and 8 are provided in order to be able to insert flaps 2 and 2. In Figure 3 is an enlarged view to see the flaps, which consist of a cylindrical central punch 9, an enlarged head part 10 and a foot part 11, whose diameter is greater than that of the cylindrical Stamp is. A vertical channel 12 penetrates the flap from the head part to a little above the foot part 11.

The assembly of the three representing the closure according to the invention Sharing is very simple and is done as follows:

A pin is inserted into the channel 12 of a flap, after which the flap is brought in front of an opening 7, 8 of the closure will. By simple pressure, the foot part 11 of the elastomer flap is pushed through the opening, after which the flap, after the foot part has stepped out at the other end and resumed its original shape, firmly in the Opening is anchored. The pin is then withdrawn from the canal and used in the same way insert the next flap into the second opening provided for this purpose, but in the opposite direction, so that the The head part of this flap rests on the underside of the cover part.

As you can see, after insertion, the two headboards cover the flaps have two openings 5-5 and 6-6 so tight that no gas exchange takes place through the closure and that the pressure levers under consideration are protected against dust.

If there is overpressure during use, one of them exceeds the permissible value in the expansion vessel, the flap 3 is pushed through the openings 6 due to the pressure Gas raised so that the gases can escape and a normal

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Pressure is restored.

In the event of a negative pressure in the expansion vessel, the flap 2 is used to create pressure compensation by introducing air into the Passes the vessel through the openings 5-5 by lifting the elastic head part, which otherwise closes it tightly.

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Claims (4)

Dlpl.-Phy ». UM stop 8 Munich 22nd Patent attorney Maxlmlllanstr. 15 _ _ _ -. ~ _QQ Tel. 294818 Z / DOO O ^ Claims Closure for expansion vessels, especially for the cooling system of motor vehicles, characterized by a molding, in particular made of a thermoplastic Material, such as polyacetal, consists, the horizontal cover part of which at its edge into a perpendicular to it Wall passes and which is provided with openings, some of which are used for gas exchange through them and others serve to accommodate flaps made of an elastomer. 2. Closure according to claim 1, characterized in that the flaps made of elastomer have an expanded head part, one have central cylindrical punch and a Pußteil whose diameter is larger than that of the punch and that further a channel is provided in the flap, which is open at the head part but is closed in the foot part. 3. Closure according to claim 1 and 2, characterized e t that the elastomer flaps are inserted into the openings provided for this purpose in the molded piece in such a way that their head parts are on different sides of the cover part and that they cover the openings intended for gas exchange . 4. Procedure for inserting elastomer valves into the 80982 ^ / 0740 Bank details: ComiMnbank Munich bank code 70040041, account no.3720380 S.W.I.F.T. - Cod «COBADEFF 700; Postal Check Office MOndwn. Account No. 33831-801 ORIGINAL INSPECT «) End according to claim 1, characterized / that a pin is inserted into the central channel of the flap, that the flap is then inserted through the corresponding opening of the molding is pressed until the foot part protrudes on the opposite side and the flap is firmly anchored, that then the pin is withdrawn, that the pin is inserted into the channel of the next flap and that this is in in the same way, but in the opposite direction to the first flap, is inserted into the corresponding opening of the molded piece. 8098 2ψ / 07Α0