Commonly-piloted directional control valve and load pressure sig

Details Commonly-piloted directional control valve and load pressure sig Commonly-piloted directional control valve and load pressure sig

1988-09-22

1990-11-06

Look, Edward K.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

F15B 1102

Patent

active

049675540

ABSTRACT:
A load-independent control device for hydraulic users has an initial position in which a control line transmitting a load pressure is connected with a tank. The control device has a control valve for the user and a switching valve, which can be controlled independently of the control valve, and has a cutoff position as well as a through position, in which it connects with the control line transmitting the load pressure to the tank.

REFERENCES:
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patent: 3906840 (1975-09-01), Bianchetta et al.
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patent: 4379389 (1983-04-01), Liesener
patent: 4425759 (1984-01-01), Krusche
patent: 4523430 (1985-06-01), Masuda
patent: 4542678 (1985-09-01), Kochendorfer et al.
patent: 4642984 (1987-02-01), Dixen
patent: 4697498 (1987-10-01), Yoshikawa et al.
patent: 4712377 (1987-12-01), Yoshida et al.

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