Valve

Details Valve Valve

1988-02-26

1989-05-09

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137541, 251337, 267 74, F16K 1500

Patent

active

048279757

ABSTRACT:
The check valve employs a helical tension spring which is connected at one end to the valve lid on the axis of the valve lid and at the opposite end via a ring on the axis of the valve body. Wedge-shaped elements are provided in the lid to engage with an annular groove in the spring and similar wedge-shaped elements are provided in a hub of the ring to engage with the second end of the spring. A rubber member may also be inserted within the windings of the spring to reduce the flow cross section through the valve body.

REFERENCES:
patent: 2330091 (1943-09-01), Townhill
patent: 2623540 (1952-12-01), Palermo
patent: 2756106 (1956-07-01), Schenk
patent: 3289686 (1966-12-01), Tyer
patent: 3817507 (1974-06-01), Derman

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