Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1978-06-07
1980-10-21
Cline, William R.
Fluid handling
Line condition change responsive valves
Direct response valves
251368, F16K 1504
Patent
active
042288215
ABSTRACT:
A gas-tight ball valve having a ball and a valve seat made of hard material such as sapphire or ruby, wherein said valve seat has two annular surfaces forming between them an edge with an obtuse angle, the ball resting on one of said surfaces, and a method for producing the valve seat by lapping said surfaces and then polishing them for breaking the edge between such surfaces.
REFERENCES:
patent: 2695628 (1954-11-01), Wheildon, Jr.
patent: 3055391 (1962-09-01), Shuk et al.
patent: 3264718 (1966-08-01), Paul, Jr.
patent: 3887162 (1975-06-01), Antoni et al.
patent: 3964510 (1976-06-01), Roller
Cline William R.
Saphirwerk Industrieprodukte AG
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