Directional control valve

Details Directional control valve Directional control valve

1987-01-02

1988-01-12

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

13759618, 137884, 137885, F15B 1308

Patent

active

047184515

ABSTRACT:
An improvement to reduce the size of a directional control valve by providing a plurality of pilot spool valves in a single valve casing. A plurality of valve mechanisms are juxtaposed in a monolithic valve casing by individually inserting valve members in a plurality of parallel valve bores provided in the valve casing. A plurality of cylinders corresponding to the valve bores are pierced in an intermediate plate mounted on the valve casing from that face which comes in contact with the valve casing. The cylinders communicate with each other by means of grooves cut in the aforementioned contacting face and open into the atmosphere through a relief port. The adjoining cylinders are thus brought closer, and the valve bodies are driven by pilot fluid pressure that act on the pistons fitted in the individual cylinders.

REFERENCES:
patent: 3530897 (1970-09-01), Buchanan
patent: 3603348 (1979-09-01), Wright
patent: 3918488 (1975-11-01), Minami
patent: 3918489 (1975-11-01), Foster et al.
patent: 3982726 (1976-09-01), Bublitz et al.
patent: 4082108 (1978-04-01), Dininio
patent: 4100937 (1978-07-01), Mallory
patent: 4453565 (1984-06-01), Neff
patent: 4640309 (1987-02-01), Hoffman et al.

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