Mannesmann Aktiengesellschaft

Erhard Lehnert

Axel Kemner

Jorg Niederstadt

Ralf Stoffels

A device for operating a machine element subject to wear-related play, especially for brakes of rail vehicles, includes a pressure-medium-operated piston-cylinder arrangement having a cylinder and operating piston, the piston rod of which is actively connected to a readjustment device that compensates for wear-related play. To realize a simple and compact structure and create further prerequisites for active integration into an operating system, the readjustment device comprises a readjustment piston mounted in the piston-cylinder arrangement between the operating piston and the bottom of the cylinder and acts as a limit stop for the operating piston. For axial arresting the readjustment piston, a coaxial piston rod shoulder that faces the bottom of the cylinder and a holding element resting on the bottom of the cylinder form an arresting arrangement that permits movement of the readjustment piston toward the operating piston and blocks a counter movement of the readjustment piston. A cylinder space created between the cylinder bottom and the readjustment piston is pressurized from an external source with a pressure medium via a pressure medium port to move the readjustment piston.

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Uetze, Germany

Erhard Lehnert