Hydraulic tensioner

A tensioner for a traction drive includes a cylinder arranged in a housing at a distance to a housing wall to thereby define an interior space which contains hydraulic fluid. A piston is received in the cylinder for back-and-forth movement and bounds a pressure chamber containing hydraulic fluid. Th...

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Bibliographic Details
Main Authors Grunau, Arbogast, Bertelshofer, Thomas, Kratz, Eduard, Schäfer, Christian, Schäfer, Harald, Jäger, Dietmar, Orsi, Marco
Format Patent
LanguageEnglish
Published 30.03.2010
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Summary:A tensioner for a traction drive includes a cylinder arranged in a housing at a distance to a housing wall to thereby define an interior space which contains hydraulic fluid. A piston is received in the cylinder for back-and-forth movement and bounds a pressure chamber containing hydraulic fluid. The piston has a cylinder-distal end which is operatively connected to a spring-biased tension roller supported on a traction member. Formed between the piston and the cylinder is a leakage gap, and a reservoir for hydraulic fluid is provided in an area of the leakage gap to prevent ingress of air into the pressure chamber, when the traction drive is at a rest.