Hydraulic valve

Details Hydraulic valve Hydraulic valve

1978-03-30

1980-04-15

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

1376256, 13762563, 91 52, F15B 13042

Patent

active

041978781

ABSTRACT:
A hydraulic fluid spool valve having a bore in the housing and a stationary rod centrally through the bore; a hollow valve spool in the bore and embracing the rod, the spool having main lands and grooves engaging the bore periphery for variously connecting and obstructing fluid passages intersecting with the bore, the spool having control lands at its opposite ends minutely spaced from the bore periphery, and defining band orifices allowing continuous flow of hydraulic oil, and passages at the ends of the bore supplying control hydraulic fluid into the bore, and dual end-to-end springs within the hollow spool, anchored on the rod and also anchored to the spool to return the spool to centered rest position.

REFERENCES:
patent: 3135294 (1964-06-01), Huber
patent: 3862643 (1975-01-01), De Zelan et al.
patent: 3949645 (1976-04-01), Masclet
patent: 4044795 (1977-08-01), Tardy et al.

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