142 is ejected by rotation of the output shaft 110 and the second brake elements 140 arranged thereon via the recess 101 arranged in the housing 100 this heated oil ejected from the brake mechanism 1 can be subsequently cooled through components which are not illustrated in fig2 and are arranged in an oil circuit after a brake application by the service brake the actuating pressure prevailing in the first control chamber 121 is reduced consequently the first control element 120 due to the coupling with the second spring element 170 is moved towards the second control element 122 during a braking action not illustrated in fig1 and 2 by the parking brake the actuating pressure prevailing in the second control chamber 123 is reduced as shown in fig1 therefore the second control element 122 due to the spring force exerted by the first spring element 124 on the flange end of the second control element 122 is moved towards the brake elements 140 141 since the second control element 122 is in contact with the first control element 121 the first control element 121 is also moved towards the brake elements 140 141 accordingly the control elements 120 122 are moved so far until the first control element 121 is in contact with the brake elements 140 141 in this case fluidic connection of the brake chamber 150 to the inlet manifold 180 is prevented by the control elements 120 122 alternatively to the embodiments illustrated in fig1 and 2 independently of the position of the control elements 120 122 a continuous oil supply from the inlet manifold 180 to the brake chamber 150 can be regulated this could take.