Poppet check valve

Details Poppet check valve Poppet check valve

1994-09-07

1996-10-15

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

137535, F16K 1506

Patent

active

055644678

ABSTRACT:
A poppet check valve for resisting fluid flow through an orifice in a backflow direction includes a valve element, a valve seat defining a valve orifice, and at least first and second torsion springs mounted to apply a pre-determined closing force to bias the valve element toward sealing engagement upon the valve seat. The pre-determined closing force applied by each torsion spring has an axial component, applied in the axial direction, and a lateral component, applied generally transverse to the axial direction. The axial component has a first value with the valve element in a first position and a second value with the valve element in a second position more spaced from the valve seat, the first value being greater than the second value. The lateral component also has a first value in the first position of the valve element and a second value in the second position, the first value being less than the second value. The axial components are applied in alliance and the lateral forces are applied in mutual (cancelling) opposition.

REFERENCES:
patent: 711792 (1902-10-01), Smith
patent: 813145 (1906-02-01), Fancher
patent: 1462081 (1923-07-01), Breeden
patent: 1786605 (1930-12-01), Durning
patent: 2119851 (1938-06-01), Cave
patent: 2214459 (1940-09-01), Gottlieb
patent: 2523192 (1950-09-01), Brown
patent: 2547882 (1951-04-01), Norton
patent: 3376935 (1968-04-01), Baker
patent: 3640306 (1972-02-01), Vogt
patent: 4072167 (1978-02-01), Habiger
patent: 4298023 (1981-11-01), McGinnis

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