Spool control valve

Details Spool control valve Spool control valve

1990-05-23

1991-11-05

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

137545, 137547, 137550, 13762564, F15B 13043

Patent

active

050624547

ABSTRACT:
A spool control valve in which communicating passages are provided in the spool to communicate between a pair of locations in the spool passage and filter means are provided in a communicating passage to prevent valve orifices being blocked by particles of foreign matter in the fluid.

REFERENCES:
patent: 2532568 (1950-12-01), Myers
patent: 2832318 (1958-04-01), Paine
patent: 2897792 (1959-08-01), Baltus et al.
patent: 2936783 (1960-05-01), Moffatt
patent: 2977985 (1961-04-01), Ericson et al.
patent: 3167632 (1965-01-01), O'Connor
patent: 3698437 (1972-10-01), Cox
patent: 4763872 (1988-08-01), Ichihashi et al.
patent: 4875501 (1989-10-01), Ichihashi et al.
patent: 4922964 (1990-05-01), Buscher

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