Flapper valve

Details Flapper valve Flapper valve

1991-06-20

1992-11-03

Bagnell, David J.

Wells

Valves, closures or changeable restrictors

Fluid operated

137515, 137527, E21B 3406, F16K 1503

Patent

active

051599813

ABSTRACT:
A flapper valve assembly when closed permits flow through in one direction and prevents flow in the opposite direction. When open, two way flow may occur and the flapper valve member is biased toward closed position, to sealingly engage an annular seat, by one or more springs in the wall of the flapper valve housing. This structure provides a greater closing force applied to the flapper valve through a tension member connected to the flapper valve hinge. Three forms of tension members are disclosed.

REFERENCES:
patent: 1871536 (1932-08-01), Le Bus
patent: 2342485 (1944-02-01), Percifield, Jr.
patent: 2780290 (1957-02-01), Natho
patent: 3482603 (1969-12-01), Outcalt
patent: 3817278 (1974-06-01), Elliot

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