192 clutches and power-stop control – Clutches – Operators
Patent
1990-02-05
1990-12-04
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
192 85R, 192111A, 475 86, F16D 1375, F16D 2508
Patent
active
049747142
ABSTRACT:
A clutch assembly (35) is disclosed of the type which can retard rotation of an output member (27) relative to an input member (33). The clutch assembly includes discs (59, 61) fixed for rotation with the input and output members, respectively. Also included is a clutch apply piston (63) which defines a high pressure chamber (67), the apply piston being responsive to pressure in the high pressure chamber to apply a biasing force to the clutch discs. A low pressure piston (69) defines a low pressure chamber (79), the low pressure piston having a transverse area (A) and also including a secondary piston portion (71) extending axially into the high pressure chamber and having a transverse area (B) the volume of the high pressure chamber (67) is maintained substantially constant by a chamber piston (65) and a one-way clutch assembly (93). Changes in pressure in the low pressure chamber (79) result in amplified changes in pressure in the high pressure chamber (67) in a ratio approximately equal to the ratio of the transverse area (A) to the transverse area (B).
REFERENCES:
patent: 2991664 (1961-07-01), Bernotas
patent: 3894446 (1975-07-01), Snoy et al.
patent: 4412459 (1983-11-01), Goscenski
patent: 4653272 (1987-03-01), Sibeud et al.
Bonck Rodney H.
Eaton Corporation
Kasper L. J.
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