Valves and valve actuation – Reciprocating valve – Particular head and seat cooperation
Patent
1976-11-11
1978-05-09
Weakley, Harold W.
Valves and valve actuation
Reciprocating valve
Particular head and seat cooperation
251189, F16K 100
Patent
active
040883019
ABSTRACT:
In a valve arrangement in which a metallic valve body has an edge portion elongated in a closed loop and can be moved into a position of sealing engagement over the entire length of the loop with a cooperating seating surface in a vacuum line, and the engaged edge portion is pressed against the seating surface with a pressure sufficient to form a vacuum tight seal, the invention provides a hollow valve body whose cavity is sealed by a first wall portion. A peripheral part of the wall portion envelops a central part and is joined to at least one other wall portion along the closed loop of the edge portion. The first wall portion slopes inward of the cavity from each longitudinal section of the loop toward the central part. When a gas under sufficient pressure moves the central part of the first wall portion outward of the cavity, the peripheral part and the joined edge portion expand, and the edge portion is pressed against the seating surface.
REFERENCES:
patent: 1721324 (1929-07-01), Wilson
patent: 3108780 (1963-10-01), Wishart
patent: 3327993 (1967-06-01), Elckyshyn
VAT Aktiengesellschaft fur Vakuum-Apparate-Technik
Weakley Harold W.
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