Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Liquid supplied at valve interface
Patent
1979-01-15
1981-03-10
Schwadron, Martin P.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Liquid supplied at valve interface
251315, 251172, 251192, 277 29, F16K 500, F16K 2500
Patent
active
042547938
ABSTRACT:
A ball valve is disclosed wherein seal assemblies, extending about flow passages in the body of the valve to either side of a valve chamber containing the ball, are constructed to vent excess pressure in portions of the valve chamber cut off from the flow passages by the sealing of the seal assemblies to the ball and to the valve body without the need for backing the seal assemblies away from the ball. For this purpose, the seal between the valve body and each seal assembly is formed by an elastomeric biasing ring which is bonded on one side to the valve body or to other portions of the seal assembly and has an opposite, free side engaging the other of the valve body or other portions of the seal assembly. The biasing ring is positioned on a side of the seal assembly opposite the ball and fluid pressure in the cut off portion of the valve chamber is transmitted about the seal assembly to the free side of the biasing ring for venting thereacross into a flow passage. The biasing ring is axially compressed between the valve body and other portions of the seal assembly to urge the other portions of the seal assembly against the ball.
REFERENCES:
patent: 3210042 (1965-10-01), Freeman
patent: 3357679 (1967-12-01), Gulick
patent: 3378026 (1968-04-01), Oliver
patent: 3455534 (1969-07-01), Scaramucci
patent: 3497178 (1970-02-01), Priese
patent: 3508736 (1970-04-01), Rhodes et al.
patent: 3667727 (1972-06-01), Bowder
patent: 3752178 (1973-08-01), Grove et al.
patent: 4116208 (1978-09-01), Smith
Chambers A. Michael
Schwadron Martin P.
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