Clutch of automatic transmission

Details Clutch of automatic transmission Clutch of automatic transmission

1994-03-01

1995-06-06

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Operators

192 85A, 192106F, F16D 25061

Patent

active

054214394

ABSTRACT:
A clutch of an automatic transmission having a clutch drum having a fluid chamber defined therein clutch hub coaxially disposed within the clutch drum; a clutch plate pack operatively interposed between the clutch drum and the clutch hub; and a piston slidably disposed in the fluid chamber in such a manner that a movement of the piston in a given direction due to feeding of operating fluid into the fluid chamber presses the clutch plate pack. In the invention, there is provided in the clutch a fine passage which connects the fluid chamber to an open air. The fine passage is exposed to a radially inner portion of the fluid chamber, so that under rotation of the clutch drum, any remaining air is forced to move toward the fine passage by the operating fluid in the fluid chamber. The fine passage is sized to permit passing of air therethrough while blocking passing of the operating fluid.

REFERENCES:
patent: 2795309 (1957-06-01), Hasbany
patent: 4325471 (1982-04-01), Schuster
patent: 4421218 (1983-12-01), Haight
patent: 5281190 (1994-01-01), Koivunen
patent: 5305863 (1994-04-01), Gooch et al.

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