Robert Boschgmbh

Siegfried Beck

Heiner Gassmann

Steffen Straub

Werner Heinlein

Aloys Schnaker

Jurgen Holfelder

A plastic housing cover for a valve having an integral connector nozzle part provided with a metal threaded nipple element is proposed, in which it is assured that the threaded element, inserted in a sealing manner into the plastic, cannot destroy the tight connection with the plastic part during the twisting of insertion and possible twisting on the part of the threaded element itself. The threaded element is accordingly given an opportunity at the outset to rotate, while maintaining the tightness of the seal. The threaded nipple element is preferably a hollow threaded connector and the plastic part comprises a cover of a compressed air valve, especially a brake valve.

Plastic part provided with a metal threaded element

A dual circuit brake valve which is provided with a relief connection intended for two separate individual valves and in which two outlet valve seats are disposed centrally in the valve. The two outlet valve seats are prestressed with respect to one another by way of a bolt and a prestressed pressure-limiting spring in such a way that at a time braking begins the two individual valves represent a rigid connection. From a pressure limitation point on, the two individual valves then support themselves elastically against one another, so that a further increase in braking pressure is precluded. The dual circuit brake valve is intended for brake systems having high pressure as a reservoir pressure and normal pressure as the braking pressure.

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Stuttgart, Germany

Siegfried Beck