Actuating device for a clutch

Details Actuating device for a clutch Actuating device for a clutch

F - Mech Eng,Light,Heat,Weapons

16

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192/9

F16D 25/00 (2006.01) F16D 48/02 (2006.01) F16D 48/04 (2006.01)

Patent

CA 1174616

ABSTRACT OF THE DISCLOSURE A hydraulic actuating device for disengaging a clutch engaged by spring force contains a valve arrangement which enables disengagement to be effected even if the drive motor is at a standstill and no pump energy is available. The valve arrangement controlling the disengaging operation and compris- ing a blocking position, a through-flow position and a control position, may be moved into an overtravel position by a rod movable via the clutch pedal. The overtravel position is felt as pressure point on the clutch pedal. In the process, the valve arrangement mechanically pushes open a return valve via a supporting piston whereby the return valve connects a pres- sure reservoir with a servomotor of the clutch.

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