4/3-directional control valve

Details 4/3-directional control valve 4/3-directional control valve

1984-08-31

1986-10-14

Focarino, Margaret A.

Fluid handling

Systems

Supply and exhaust

13759616, 91465, F15B 1500

Patent

active

046166742

ABSTRACT:
A 4/3-directional control valve with a tubularly shaped valve housing that includes along its longitudinal dimension a central return connection to a reservoir tank for hydraulic liquid, to the left and right of the return connection a working connection to the front and backside of a hydraulic piston disposed symmetrically thereto as well as a pump connection to a pump supplying a constant pressure; these hydraulic connections are adapted to be controlled by two oppositely operating control pistons having a coil spring disposed therebetween, whose end faces are adapted to be acted upon with pump pressure by electromagnetically actuated pilot valves; the volume of the hydraulic liquid which is displaced at one piston side during the left respective right movement of the hydraulic piston, reaches the other piston side by way of the two working connections.

REFERENCES:
patent: 2366127 (1944-12-01), Rappl
patent: 2637303 (1953-05-01), Cintron
patent: 2637341 (1953-05-01), Borst
patent: 3212409 (1965-10-01), Mash
patent: 3870073 (1975-03-01), Ruchser et al.
patent: 4259986 (1981-04-01), Maucher et al.

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