Clutch with piston modulating valve

Details Clutch with piston modulating valve Clutch with piston modulating valve

1975-03-31

1976-03-16

Wyche, Benjamin W.

192 clutches and power-stop control

Elements

Thrust members, retarders, and stops

192109A, 192106F, 91401, F16D 2500

Patent

active

039440362

ABSTRACT:
A multi-disc hydraulically operated friction clutch is provided with valve means in the form of longitudinally split plugs received in the drain openings of the plunger and varying the flow passage area of these openings, depending on the position of the plunger. Said plugs of the valve means are displaced, on the one hand, by the contact thereof with the pressure disc of the clutch, and, on the other hand, by their abutting against the housing of the clutch. By selecting the ratings of the valve means, i.e., the dimensions of the drain slit in the plugs, it is possible to ensure any required degree of smoothness of engagement of the clutch, the pressure disc acting upon the package of the friction discs with a gradually varying effort, proportional to the rate of draining of the working fluid through the plunger.

REFERENCES:
patent: 2386220 (1945-10-01), Lawler et al.
patent: 2670828 (1954-03-01), McFarland
patent: 2720866 (1955-10-01), Maki et al.

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