Patent ID: 8376113

Claim:
An actuation device for a clutch, the actuation device comprising: a master cylinder having an interior space; a master piston dividing said interior space of said master cylinder into a slave oil chamber and a master oil chamber; an oil reservoir; a tank line leading to said oil reservoir; a pressure line leading from said oil reservoir; a valve connected to said slave oil chamber, said valve having a first valve position and a second valve position, said valve connecting said slave oil chamber to said pressure line in said second valve position; a slave cylinder having an oil chamber; a working line connected to said oil chamber of said slave cylinder; a compensating tank including a compensating volume having a highest point with an overflow connected to said tank line; a compensating line connected to said compensating tank; said master oil chamber being connected to said working line and, depending on a position of said master piston, to said compensating line; a return line connected to said compensating tank; and said valve connecting said slave oil chamber to said return line in said first valve position.