Hydraulic releasing device used in a motor vehicle for a clutch comprises a seal anchored on a holding ring fixed to a piston for common axial movement in both axial directions with the exception of the axial movement play formed in between

摘要

Hydraulic releasing device for a clutch comprises an annular pressure chamber between a housing and a guide sleeve, and a tubular piston (10) moving axially within the pressure chamber and connected to a seal (16) on the pressure-loading side for common axial movement. The seal is anchored on a holding ring (14) fixed to the piston for common axial movement in both axial directions with the exception of the axial movement play (30) formed in between. Preferred Features: At least one locking nose (24) and one locking edge (26) receiving the locking nose to form the axial play are provided between the holding ring and the piston.