Fluid handling – Systems – Multi-way valve unit
Patent
1982-03-31
1984-10-23
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
91433, F15B 13044
Patent
active
044782500
ABSTRACT:
A pressure control valve construction comprising a valve body having an inlet port adapted for connection to a pressure source, a pair of working ports adapted for connection to respective loads, and a pair of outlet ports connected to a reservoir. A control spool is movably mounted in a bore in the body and includes lands for respectively controlling communication between the inlet port and respective ones of the working ports and between the working ports and the outlet ports. The control spool has opposite ends with blind bores respectively provided therein, and sensing spools are respectively mounted for sliding movement in the blind bores to define spaces between the bottoms of the blind bores and the sensing spools. The spaces communicate with the working port via respective openings in the control spool. In the case of a double acting valve, an actuator is provided at each end for acting on a respective sensing spool whereas for a single acting control valve only one actuator is provided.
REFERENCES:
patent: 2536965 (1951-01-01), Taylor
patent: 3015317 (1962-01-01), Buchanan et al.
patent: 3799200 (1974-03-01), Tipton
patent: 4227549 (1980-10-01), Adams
patent: 4397614 (1983-08-01), Larner
Ewald Roland
Lukasczyk Wolfgang
Mannesmann Rexroth GmbH
Michalsky Gerald A.
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