Proportional seat-type 4-way valve

Details Proportional seat-type 4-way valve Proportional seat-type 4-way valve

1991-08-29

1993-05-18

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

91420, 91446, 91454, 91464, 13759616, F15B 13044

Patent

active

052111962

ABSTRACT:
A proportional valve comprises two electrically actuated proportional throttle valves, each having an outlet connected to a non-return valve, to each of which a seat valve is connected, each seat valve being pilot-controlled by one of the proportional throttle valves; the electric actuation of the proportional throttle valves proportionally controls and regulates the functions of a hydraulic cylinder. The two throttle valves and the two seat valves are mounted on a housing block which has a planar face at which are connections to a pressure line, a tank line and working lines.

REFERENCES:
patent: 4201052 (1980-05-01), Breeden et al.
patent: 4266466 (1981-05-01), Ziems
patent: 4480527 (1984-11-01), Lonnemo
patent: 4531449 (1985-07-01), Reith
patent: 4646622 (1987-03-01), Ishizaki et al.
patent: 4711267 (1987-12-01), Schwelm

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