Patent attributes
The present invention provides a tensioning device, in particular for a timing chain of an internal combustion engine, having a housing, a tensioning piston guided in a piston bore of the housing, and a locking means for limiting the retraction motion of the tensioning piston into the piston bore of the housing. The locking means comprises a locking ring arranged on the tensioning piston. Furthermore, the locking means comprises a separate locking sleeve that can be reversibly radially expanded and is arranged at one tensioning end of the housing to introduce the locking ring into the locking means in the retraction direction of the tensioning piston and to retain the locking ring in the locking means in the tensioning direction of the tensioning piston.
