The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2010
Filed:
Nov. 23, 2004
Arbogast Grunau, Weisendorf, DE;
Thomas Bertelshofer, Ebermannstadt, DE;
Eduard Kratz, Höchstadt, DE;
Christian Schäfer, Nürnberg, DE;
Harald Schäfer, Nürnberg, DE;
Dietmar Jäger, Langenzenn, DE;
Marco Orsi, Middlesex, GB;
Arbogast Grunau, Weisendorf, DE;
Thomas Bertelshofer, Ebermannstadt, DE;
Eduard Kratz, Höchstadt, DE;
Christian Schäfer, Nürnberg, DE;
Harald Schäfer, Nürnberg, DE;
Dietmar Jäger, Langenzenn, DE;
Marco Orsi, Middlesex, GB;
INA-Schaeffler KG, Herzogenaurach, DE;
Abstract
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.