Valves and valve actuation – With means to increase head and seat contact pressure – Separate actuators or actuator motion
Patent
1976-10-06
1979-01-30
Weakley, Harold W.
Valves and valve actuation
With means to increase head and seat contact pressure
Separate actuators or actuator motion
251191, F16K 2500
Patent
active
041368525
ABSTRACT:
A valve comprising a resiliently expansible and compressible plug movable in a valve chamber to open and close a flow passage intersected by the chamber. The plug has a sealing portion which is expanded outwardly against the walls of the chamber, e.g., by being compressed in a different direction to maintain a fluid type seal when the plug is moved in a chamber between open and closed positions of the valve.
In a preferred embodiment, the plug is provided with 1) a valve stem and includes 2) an inner elastomeric portion in the upper portion of which is embedded 3) a rigid plate-like member or disc, preferably formed integral with the valve stem, 4) a non-elastomeric ring-shaped anti-extrusion member, preferably formed of two or more complementary arcuate portions, suitably two semi-cylindrical ring portions, surrounding the lower portion of the inner elastomeric portion of the plug below the plate member, and 5) an outer elastomeric cover portion which completely surrounds the anti-extrusion ring member or members and preferably includes a base portion which covers the bottom of the inner elastomeric plug portion.
REFERENCES:
patent: 1695536 (1928-12-01), Crowley
patent: 2290251 (1942-07-01), Saunders
patent: 2424210 (1947-07-01), Sutton
patent: 2552991 (1951-05-01), McWhorter
patent: 2925246 (1960-02-01), Sardeson
patent: 3586042 (1971-06-01), Grenier
patent: 3688798 (1972-09-01), Nightingale
patent: 3747479 (1973-07-01), Nightingale
General Industries, Inc.
Weakley Harold W.
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