Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1993-01-26
1994-05-17
Michalsky, Gerald A.
Fluid handling
Systems
Flow path with serial valves and/or closures
137115, 417307, G05D 1600
Patent
active
053119053
ABSTRACT:
A remote pressure sensitive dump valve which includes a housing having first, second and third fluid ports, the first fluid port adapted for connection to a source of very high pressurized fluid, the second fluid port being adapted for connection to a remotely controllable fluid control valve and the third fluid port being adapted for connection to a conduit for dumping fluid back to a pump reservoir when the remote controllable fluid control valve is in the closed position. The housing includes a chamber in which is provided an elongated valve member which is reciprocal therein between first and second positions. The position of the valve member is directly responsive to the opened or closed condition of the remotely controllable fluid control valve. An annular valve seat is provided on the valve member and in the chamber so that when the valve member is moved to the first position, the first and second annular valve seats will be in engagement with one another and the remotely controllable fluid control valve will be open. When the remotely controllable fluid control valve is closed, fluid flow through the valve member will be halted to hydraulically cause a sufficient pressure imbalance between the opposite ends of the valve member to effect an automatic movement of the valve member from the first position to a second position wherein the first and second annular valve seats are separated to allow fluid to exit from the chamber to the return line.
REFERENCES:
patent: 3322134 (1967-05-01), Enemark
patent: 3455322 (1969-07-01), Chichester
patent: 4589825 (1986-05-01), Schmidt
patent: 4791950 (1988-12-01), Pedersen
Hytech Pumps International Inc.
Lee Kevin L.
Michalsky Gerald A.
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