Valves and valve actuation – Reciprocating valve – Gate
Patent
1983-03-07
1986-02-04
Weakley, Harold W.
Valves and valve actuation
Reciprocating valve
Gate
251330, 251363, 137 72, F16K 300
Patent
active
045680620
ABSTRACT:
A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.
REFERENCES:
patent: 3006599 (1961-10-01), Eckert
patent: 3162208 (1964-12-01), Curatola
patent: 3896835 (1975-07-01), Wicke
patent: 4029294 (1977-06-01), McCaskill
patent: 4208035 (1980-07-01), Alvarez
patent: 4214600 (1980-07-01), Williams
patent: 4289157 (1981-09-01), McGee
patent: 4307745 (1981-12-01), McGee
patent: 4421134 (1983-12-01), Broton
patent: 4436283 (1984-03-01), Shore
Barrett Stephen P.
Jennings Charles E.
Keene Kendall E.
Koleilat Bashir M.
McIntyre John N.
FMC Corporation
Megley Richard B.
Ritt, Jr. W. William
Weakley Harold W.
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