Variable flow control valve for steering systems of articulated

Details Variable flow control valve for steering systems of articulated Variable flow control valve for steering systems of articulated

1978-03-15

1980-12-23

Cohen, Irwin C.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

91461, 137117, G05D 1102

Patent

active

042404576

ABSTRACT:
The steering system comprises at least one double-acting fluid cylinder, a directional control valve connected to the cylinder for alternately extending and retracting the cylinder and a hand metering unit for communicating a fluid steering signal to the directional control valve whereby an engine-driven pump is adapted to communicate pressurized fluid to the cylinder for steering purposes. A variable flow control valve is interconnected between the pump and the hand metering unit for communicating a variable fluid flow to the hand metering unit in proportion to the speed of the pump to vary the fluid steering signal whereby an operator can sense the speed of the pump. In the preferred embodiment of this invention, the variable flow control valve comprises a pair of spring-biased, reciprocal members which sense a differential pressure across the valve to control fluid flow through an outlet which is adapted to be connected to the hand metering unit.

REFERENCES:
patent: 2305023 (1942-12-01), Moore
patent: 2905191 (1959-09-01), Vander Kaay
patent: 3260325 (1966-07-01), Brown et al.
patent: 3403512 (1958-10-01), Malott
patent: 3448685 (1969-06-01), Kroth
patent: 3554213 (1971-01-01), Yoshino
patent: 3728941 (1973-04-01), Cryder
patent: 3771424 (1973-11-01), Allen et al.
patent: 3959968 (1976-06-01), Greiner
patent: 3960172 (1976-06-01), Blake
patent: 3996742 (1946-12-01), Goff
patent: 4027474 (1977-06-01), Demase

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