Check valve

Details Check valve Check valve

1980-10-14

1982-03-30

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1503

Patent

active

043219446

ABSTRACT:
A check valve with a valve seat formed in the valve housing wherein two side-by-side locking members are pivotably mounted in the valve seat for movement between an open and closed position. The locking members have their pivoting edges mounted adjacent and parallel to each other in the housing and have bearing bushings formed along the adjacent edges which engage side-by-side shafts whose ends are engaged to the valve housing. A pair of locking springs each have their windings engaged to one of the shafts which are located between the bearing bushings. Each of said springs has a first shank portion which is rigidly supported by an abutment of the valve housing and a second shank portion which engages the locking member mounted on the same shaft of the corresponding spring to urge the same into a closed position relative to the valve seat.

REFERENCES:
patent: Re30532 (1981-03-01), Buckner
patent: 303702 (1884-08-01), Carricaburu
patent: 3384112 (1968-05-01), Smith
patent: 3910114 (1975-10-01), Rosean
patent: 4209037 (1980-06-01), Upham

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