Dual source hydraulic steering system

Details Dual source hydraulic steering system Dual source hydraulic steering system

1974-09-09

1976-02-03

Wood, Jr., M Henson

Motor vehicles

Compensating devices

60405, B62D 508

Patent

active

039359182

ABSTRACT:
A method and plural embodiments of apparatus for delivering a pressure-compensated supply of fluid to a hydraulic steering circuit, wherein first and second pumps are respectively operated by a vehicle engine and by a ground wheel when the vehicle is in motion, output fluid from the two pumps being simultaneously directed to the steering circuit by a control valve with inlet relief valve means modulating output pressure of the sources in response to operation of the control valve. One embodiment contemplates dual inlet relief valves for separately modulating output from the two pumps while another embodiment contemplates one of the pumps having a variable output.

REFERENCES:
patent: 3424262 (1969-01-01), Kunz
patent: 3653209 (1972-04-01), Mac Duff
patent: 3719249 (1973-03-01), Becker
patent: 3838570 (1974-10-01), Marietta

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