Check valve

Details Check valve Check valve

1991-12-10

1992-11-10

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137854, F16K 1508

Patent

active

051615711

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: 2326651 (1943-08-01), Husted
patent: 2547377 (1951-04-01), De Juhasz
patent: 2563200 (1951-08-01), Venning
patent: 3036592 (1962-05-01), Lips
patent: 4218407 (1980-08-01), Robertson
patent: 4325366 (1982-04-01), Tabor
patent: 5014739 (1991-05-01), Csaszar

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