Fluid handling – Line condition change responsive valves – Fluid opened valve requiring reset
Patent
1983-07-22
1985-06-18
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Fluid opened valve requiring reset
137458, 137463, 13762427, 251 73, 251 74, F16K 1700
Patent
active
045236020
ABSTRACT:
Disclosed is a pressure controller for sensing changes in a service pressure and controlling a control pressure in response to such changes. The pressure controller includes a valve body having a control inlet and a bleed outlet with a passage therebetween. A valve seat is positioned in the passage and a valve member is reciprocatingly mounted in the valve body for movement between a closed position in engagement with the valve seat and an open position out of engagement with the valve seat. The controller includes a releasable latch for latching the valve member in the closed position. The controller includes a release mechanism for releasing the latch in response to changes in service pressure to allow the valve member to move to the open position.
REFERENCES:
patent: 2686528 (1954-08-01), Snyder
patent: 2902046 (1959-09-01), Dollison
patent: 3389718 (1968-06-01), Johnson
patent: 4015627 (1977-04-01), Bower
patent: 4017053 (1977-04-01), Wells
patent: 4073466 (1978-02-01), Snyder
Axelson, Inc.
Nilson Robert G.
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