Fluid handling – Line condition change responsive valves – Pop valves
Patent
1991-11-25
1992-12-15
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Pop valves
137538, 13751627, 1375395, F16K 1504
Patent
active
051708183
ABSTRACT:
A safety valve including a brass valve body having a through bore provided with a circular sharp-edged valve seat and another sharp edge. A valve stem carrying a ball valve and a biasing spring disposed in the through bore. A cap member screwed through onto the brass valve body and causing the ball valve to be seated on the sharp-edged valve seat and causing the ball valve to be positioned in close proximity to the other sharp edge. A plurality of radially vent holes formed in the brass valve body for venting fluid pressure to atmosphere when the ball valve becomes unseated from the sharp-edged valve seat. A lock nut for locking the cap member in position and a spring pin carried by the valve stem to permit the ball valve to be manually opened.
REFERENCES:
patent: 2964310 (1960-12-01), Stahlhuth
patent: 2987071 (1961-06-01), Haus
patent: 3747635 (1973-07-01), Garamy
patent: 4930553 (1990-06-01), Grillo
Nilson Robert G.
Sotak J. B.
Westinghouse Air Brake Company
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