Patent ID: 8770354

Claim:
A pneumatic brake cylinder comprising: a housing; a piston which can be moved in the housing to transmit pneumatic pressure to a brake; and a device for automatic adjustment for wear of brake linings, the device including a spindle, an adjusting nut and a piston tube which can be brought into engagement with the adjusting nut, wherein a torque applied by the adjusting nut to the piston tube is introduced by the piston tube directly into elements which are connected fixedly to the housing, wherein the elements connected fixedly to the housing are configured as sliding blocks which slide in slots of the piston tube, wherein orientation of the housing and the device for automatic adjustment are configured such that the device for automatic adjustment is mounted to the housing prior to insertion of the elements fixedly connected to the housing into the brake cylinder housing, and wherein a control sleeve is arranged in the piston tube, the control sleeve being a composite part with a sliding sleeve made from plastic and an injection molded coupling ring made from metal, and wherein, at a free end, the injection molded coupling ring has an oblique internal toothing system which is configured to engage an external toothing system of the adjusting nut.