Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1990-02-22
1991-10-22
Michalsky, Gerald A.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
91459, 91466, 123 9011, 123 9012, F16K 31124
Patent
active
050588575
ABSTRACT:
A valve assembly for an energy transfer unit comprises a source of hydraulic fluid, a reciprocating valve member reciprocable from an open position to a closed position, a slidable sleeve assembly whereby the hydraulic fluid is selectively allowed to force the valve member into the open position or into the closed position, and a solenoid, for selectively operating the slidable valve assembly to provide for the open or closed position. The slidable sleeve assembly comprises a first sleeve half portion and a second half portion, each sleeve half portion having at least one fluid-passing aperture defined therein. Two chambers are provided, an upper chamber and a lower chamber, for selectively receiving pressurized fluid therein. Whether the valve member is in the closed position or in its open position depends upon whether or not fluid is entering or exiting the respective upper chamber and lower chamber.
REFERENCES:
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patent: 3727595 (1973-04-01), Links
patent: 3738337 (1973-06-01), Massie
patent: 3926159 (1975-12-01), Michelson et al.
patent: 4200067 (1980-04-01), Trenne
patent: 4664070 (1987-05-01), Meistrick et al.
patent: 4716863 (1988-01-01), Pruzan
patent: 4724801 (1988-02-01), O'Neill
patent: 4974495 (1990-12-01), Richeson
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