Hydraulic servo for friction coupling element of automatic trans

Details Hydraulic servo for friction coupling element of automatic trans Hydraulic servo for friction coupling element of automatic trans

1988-01-12

1990-01-02

Braun, Leslie A.

Machine element or mechanism

Gearing

In series plural interchangeably locked nonplanetary units

74753, F16H 3700, F16H 344, F16H 5710

Patent

active

048905127

ABSTRACT:
Described herein is a hydraulic servo for a friction coupling element of an automatic transmission, which is mounted in association with a one-way clutch and which has reduced dimensions in radial and axial directions. The hydraulic servo essentially comprises: an annular drum splined with a sleeve portion of the inner race of the one-way clutch and arranged to receive the reaction of the one-way clutch by a fixed member in the automatic transmission case; a piston fitted in the annular drum; and a return spring mounted in the drum for returning the piston.

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