Involute valve closure

Details Involute valve closure Involute valve closure

1985-01-23

1987-02-03

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251298, 251309, 251314, F16K 2500, F16K 500

Patent

active

046404929

ABSTRACT:
A rotary valve for fluid flow control is provided having curved sealing surfaces, at least one of which has a cross-sectional arc segment forming a portion of an involute, for a valve closure member and a fluid port valve seat or seating surface. By machining the sealing surfaces of the valve closure member and of the valve seat to the form of an involute, these surfaces will engage substantially simultaneously over the entire perimeter of the valve seat at initial closing contact and closed or sealed positions. After initial contact and during overclosure, if elastomeric surfaces are used, the compression and sealing of resilient seating material will be uniform over the entire engaging surface, and around the periphery of the valve seat.

REFERENCES:
patent: 2015849 (1935-10-01), Hardies
patent: 2263907 (1941-11-01), Stanton
patent: 2659388 (1953-11-01), Rand
patent: 2738948 (1956-03-01), Barnes
patent: 2803426 (1957-08-01), DeZurik
patent: 3420498 (1969-01-01), Housworth
patent: 3809361 (1974-05-01), Pfundstein
patent: 4022178 (1977-05-01), Cross et al.
patent: 4274436 (1981-06-01), Smith
patent: 4510966 (1985-04-01), Parsons, Jr.

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