Pressure control circuit for use in automatic transmission of ve

Details Pressure control circuit for use in automatic transmission of ve Pressure control circuit for use in automatic transmission of ve

1974-07-17

1977-05-17

Wyche, Benjamin W.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

192 032, 192109F, B60K 4104, F16K 3112

Patent

active

040234444

ABSTRACT:
A pressure control circuit for use in connection with an automatic transmission of a vehicle is disclosed which comprises a pressure regulating valve for regulating a hydraulic pressure discharged from a pressure source and for actuating frictional engaging means, said pressure regulating valve including an accumulator, a valve spool and a spring urging said valve spool in one direction, said accumulator including a hydraulic chamber, into which is supplied the hydraulic pressure which will mechanically impart an additional force to said spring at a given value of the hydraulic pressure.

REFERENCES:
patent: 2756851 (1956-07-01), Collins
patent: 3583422 (1971-06-01), Dach
patent: 3707891 (1973-01-01), Asano et al.
patent: 3714847 (1973-02-01), Ushijima
patent: 3722646 (1973-03-01), Oguma
patent: 3820417 (1974-06-01), Allen et al.

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