Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – With means for selectively changing the speed or force...
Patent
1991-12-09
1993-08-17
Look, Edward K.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
With means for selectively changing the speed or force...
91508, 91534, 91535, 192111A, F15B 1100, F15B 1300
Patent
active
052358984
ABSTRACT:
An actuator for a friction clutch having a diaphragm includes coupling means comprising a first part associated with the clutch actuating linkage, and a second part associated with the actuator proper. The actuator, of the fluid operated type, comprises a main piston working in a main cylinder and defining with it a control chamber. A secondary piston works within the hollow bore of the main piston to define within the latter a wear compensating chamber. The main piston carries a shut-off valve for bringing the control chamber and the wear compensation chamber into communication with each other when the clutch is in its engaged position. The actuator also includes a booster spring for applying additional force to the diaphragm, such that the characteristic of the diaphragm has a positive gradient over the whole travel between the engaged and disengaged positions of the clutch. The booster spring is brought into operation by a loose coupled driving means between the booster spring and the sub-assembly of the two pistons.
REFERENCES:
patent: 2282556 (1942-05-01), Bowen
patent: 4671400 (1987-06-01), Grunberg et al.
Delin Claude
Ledamoisel Claude
Michel Robert
Randriazanamparany Veve R.
Look Edward K.
Ryznic John
Valeo
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