Hydraulic control valve assembly

Details Hydraulic control valve assembly Hydraulic control valve assembly

1995-03-21

1997-03-04

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

137456, F16D 2512

Patent

active

056070381

ABSTRACT:
A hydraulic control valve assembly is described comprising a cut-off valve, a control valve and structure for connection to at least a supply line, a hydraulic apparatus line and a return line. The assembly is constructed and arranged such that the cut-off valve is bistable and controls flow of pressurised fluid from the supply line to the control valve, permitting it when primed and preventing it when closed, and the control valve controls the pressure of fluid supplied to the hydraulic apparatus line. In addition structure means are provided to initiate priming of the cut-off valve, complete the priming of the cut-off valve provided the supply line pressure is above a first predetermined pressure, and maintain the priming of the cut-off valve provided the supply line pressure remains above a second predetermined pressure.

REFERENCES:
patent: 3971404 (1976-07-01), Quarve
patent: 4651858 (1987-03-01), Horsch
patent: 5036965 (1991-08-01), Cortesi et al.
patent: 5131514 (1992-07-01), Machida

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