Check valve

Details Check valve Check valve

1991-02-05

1992-04-28

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137508, F16K 1502

Patent

active

051078856

ABSTRACT:
A check valve comprises a valve body having inlet and outlet passages and a cavity in which a diaphragm operates. The inlet passage connects with the cavity through an upstream wall partly defining the cavity and the outlet passage connects with the cavity through a downstream wall partly defining the cavity. The diaphragm has an annular sheet metal part which is secured to one of the walls and carries a movable seal. The movable seal cooperates with a sealing element to provide a circular fluid seal. In a first embodiment, the inlet passage connects with the cavity through openings located inside the periphery of the circular fluid seal. In a second embodiment the inlet passage connects with the cavity through openings located outside the periphery of the circular fluid seal. The movable seal may be a sealing surface in which case the sealing element is a seal ring, or the movable seal may comprise a seal ring in which case the sealing element is a sealing surface.

REFERENCES:
patent: 2547377 (1951-04-01), De Juhasz
patent: 3297260 (1967-01-01), Barlow
patent: 3542061 (1970-11-01), Kormos
patent: 4440189 (1984-04-01), Graham
patent: 4922955 (1990-05-01), Uri

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