Patent ID: 8221103

Claim:
A motor, comprising: an internal motor chamber ( 18 ), and a rotor ( 20 ) rotatable therein, wherein the rotor is drivable by having a pressure medium applied to it, wherein the pressure medium expands in a working area ( 40 ) of the motor chamber, and a braking element ( 22 ) for braking the rotor ( 20 ), which is axially arranged directly adjacent to the rotor ( 20 ), wherein the braking element ( 22 ) and the rotor ( 20 ) are axially moveable with respect to each other and form a spring-loaded friction pair ( 48 , 50 ), at least between a front end face of the rotor ( 20 ) and the braking element ( 22 ), characterized by a pressure chamber ( 60 ) having an extension in cross-section larger than the cross-sectional extension of the motor chamber ( 18 ) at its working area ( 40 ), wherein the pressure chamber ( 60 ) is at least unilaterally, axially delimited by the braking element ( 22 ) or the rotor ( 20 ), so that a pressure in the pressure chamber ( 60 ) results in a force to separate the friction pair ( 48 , 50 ) against the spring force, and wherein the pressure chamber ( 60 ) is arranged in such a way that the pressure medium passes into the pressure chamber ( 60 ), when the motor is in operation.