Control valve for bootstrap hydraulic systems

Details Control valve for bootstrap hydraulic systems Control valve for bootstrap hydraulic systems

1992-01-24

1993-10-05

Look, Edward K.

Power plants

Pressure fluid source and motor

Full range correspondence of position of external...

60450, 60468, 91375A, F16D 3102

Patent

active

052494209

ABSTRACT:
The present invention is directed to a hydro-mechanical or electro-hydro-mechanical control system utilized for positioning a mechanical device. The control system incorporates an improved closed-center control valve for selectively controlling the differential pressure applied to the input ports of a power output transducer and the differential flow therebetween in response to a mechanically applied rotational input. The power output transducer is then utilized to position a mechanical device. The control system is a closed loop circuit adapted to supply hydraulic fluid at a desired supply pressure to the control valve. The improved closed-center control valve is a modified rotary valve wherein parasitic leakage slots are formed for providing a leakage flow pathway through the control valve between the input ports of the power output transducer.

REFERENCES:
patent: 2407812 (1946-09-01), Cain
patent: 4217932 (1980-08-01), Bacardit
patent: 4417640 (1983-11-01), Abe et al.
patent: 4425759 (1984-01-01), Krusche
patent: 4924910 (1990-05-01), Tabata et al.

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