Check valve, especially for vacuum-operated installations in mot

Details Check valve, especially for vacuum-operated installations in mot Check valve, especially for vacuum-operated installations in mot

1977-06-22

1978-12-12

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137859, F16K 1514

Patent

active

041291433

ABSTRACT:
A check valve, especially for vacuum-operated installations in motor vehicles, which includes a two-partite housing and a roller diaphragm secured between the housing parts provided with inlet and outlet channels; the roller diaphragm which is pressed against its sealing seat by a prestressed spring, cooperates by means of its ring-shaped, curved diaphragm portion as movable sealing part with the bottom of one housing part constructed as sealing seat in such a manner that a central bore provided in the section of the roller diaphragm located on the side of the spring, connects the inlet channel terminating outside of the curved diaphragm portion with the outlet channel of the housing part, when the curved diaphragm portion lifts off from the sealing seat upon exceeding a predetermined differential pressure.

REFERENCES:
patent: 3465786 (1969-09-01), Spisak
patent: 3804113 (1974-04-01), Garcea

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