Hydraulic system for the supplying of hydrostatic steering syste

Details Hydraulic system for the supplying of hydrostatic steering syste Hydraulic system for the supplying of hydrostatic steering syste

1986-04-15

1988-05-24

Chambers, A. Michael

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60422, F16D 3102

Patent

active

047457473

ABSTRACT:
The invention concerns a hydraulic system for supplying a hydrostatic steering system. A central variable capacity hydraulic fluid pump supplies the steering system and a secondary consuming device via separate respective compensated pressure maintaining valves. The steering system and secondary consuming device are controlled by respective load report lines which are brought together at a changeover valve which is operative to permit the higher reported pressure to be delivered to a volume governor for the pump. Upon the secondary consuming device entering a neutral condition or a fluid loss condition, the changeover valve moves to block the load report line to the secondary consuming device; and a control circuit, including a branch line from the feed line to the steering system, maintains a higher pressure in the load report line of the steering hydraulic circuit than in the line of the secondary consuming device.

REFERENCES:
patent: 4335577 (1982-06-01), Lobmeyer et al.
patent: 4336687 (1982-06-01), Morgan
patent: 4400937 (1983-08-01), Lobmeyer et al.
patent: 4401009 (1983-08-01), Zenrer et al.
patent: 4470259 (1984-09-01), Miller et al.

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