Hydraulic servo for friction coupling element of automatic transmission
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United States of America Patent
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-
Jan 2, 1990
Issued Date -
N/A
app pub date -
Jan 12, 1988
filing date -
Aug 7, 1984
priority date (Note) -
Expired
status (Latency Note)
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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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