Valve apparatus

Details Valve apparatus Valve apparatus

2008-06-20

2011-10-18

Fristoe, Jr., John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S902000, C251S332000

Reexamination Certificate

active

08037897

ABSTRACT:
A valve apparatus that has a longitudinal axis therethrough comprises a valve seat member, a valve closure member, a fluid flow path, and a resilient valve insert member. The valve seat member comprises a hollow bore and a first frustoconical contact surface that has an inner perimeter and an outer perimeter. The valve closure member comprises a valve body and a second frustoconical contact surface that is adapted to seal against the first frustoconical contact surface in a strike face area. The valve closure member is movable along the longitudinal axis of the valve apparatus. The fluid flow path extends through the bore of the valve seat member and between the valve seat member and the valve closure member. This fluid flow path is closed when the second frustoconical contact surface is sealed against the first frustoconical contact surface.

REFERENCES:
patent: 2495880 (1950-01-01), Volpin
patent: 3039488 (1962-06-01), Bowerman
patent: 3057372 (1962-10-01), Sutton et al.
patent: 4860995 (1989-08-01), Rogers
patent: 4922957 (1990-05-01), Johnson
patent: 4951707 (1990-08-01), Johnson
patent: 6701955 (2004-03-01), McIntire et al.
patent: 7000632 (2006-02-01), McIntire et al.
patent: 7070166 (2006-07-01), Blume

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