Dual steering system for vehicles

Details Dual steering system for vehicles Dual steering system for vehicles

1977-02-22

1978-09-19

Peters, Jr., Joseph F.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

60405, B62D 506

Patent

active

041147200

ABSTRACT:
A dual hydraulic steering system for a vehicle has two steering circuits each having a pump and a steering valve unit. A first circuit is connected to the main working spaces of the double-acting steering cylinders while the second circuit is connected to the piston rod spaces of the cylinders. The first circuit has an engine driven pump while the second circuit has a ground wheel driven pump and an accumulator. Both circuits are connected to a common tank which is divided below a lowest normal oil level. Pressure switches and electromagnetic valves feed flow from the first circuit to the second in case of low pressure therein. This cross-over is prevented when a level switch detects low tank oil level.

REFERENCES:
patent: 3439768 (1968-04-01), Medley
patent: 3730288 (1973-05-01), Dean
patent: 3896618 (1975-07-01), Smith
patent: 3905438 (1975-09-01), Runyon
patent: 3935918 (1976-02-01), Hicks
patent: 3964566 (1976-06-01), Smith
patent: 3975908 (1976-08-01), Smith
"Offenlegungsschrift 2409207" Lang, Apr. 1975.

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