Patent ID: 8512184

Claim:
A tensioning device for a flexible driving means, comprising: a housing; a tensioning piston guided in a piston bore of the housing; and a latching element arranged outside on the housing, wherein the tensioning piston is provided with a latching profile on the front section of the tensioning piston in a tensioning direction, wherein the latching element has at least one section protruding over the housing in the tensioning direction and engaging the latching profile of the tensioning piston outside of the housing, wherein the latching element has two spring arms, protruding over the housing in the tensioning direction, formed with latching hooks aligned radially inwards, and wherein the latching element for the delimitation of the free working range between a front end-stop and a rear end-stop in and against the tensioning direction is arranged movably on the housing, and wherein the latching element has a guide ridge protruding from the latching element in the tensioning direction and extending coaxial with the longitudinal direction of the tensioning piston, the guide ridge providing an anti-twist function under operating conditions.