Flow controlling apparatus for power steering, operating fluid

Details Flow controlling apparatus for power steering, operating fluid Flow controlling apparatus for power steering, operating fluid

1981-01-15

1982-11-30

Spiegel, H. Jay

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

1374545, 138 45, G05D 1100

Patent

active

043611664

ABSTRACT:
A hydraulic fluid discharged from a pump is delivered to a power steering device from a supply passage through a restricted passage and a throttled passage so that as the flow through the supply passage increases in response to an increase in the number of revolutions of the pump, the flow path resistance presented by the restricted passage increases the pressure prevailing in the supply passage to cause a control spool to control the flow area of the throttled passage, thus decreasing the flow delivered to the power steering device. In this manner, a constant and invariable flow decrease characteristic can be maintained despite a loading pressure upon the power steering device, thus enhancing the stability under high speed running conditions. A mechanism to provide a variable control of the flow delivered to the power steering device is provided in a union which is fixedly mounted in one end of a bore in a pump housing.

REFERENCES:
patent: 2678066 (1954-05-01), Carter
patent: 2771093 (1956-11-01), Wilson
patent: 2789576 (1957-04-01), Mitchell
patent: 3024798 (1962-03-01), Banker
patent: 3217732 (1965-11-01), Haugeland
patent: 3426785 (1969-02-01), Brady et al.
patent: 3575192 (1971-04-01), MacDuff
patent: 3581760 (1971-06-01), West
patent: 3592237 (1971-07-01), Borschers
patent: 3714964 (1973-02-01), Livinston
patent: 4262844 (1981-04-01), Sekiya

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