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:
Dec. 04, 2012
Filed:
Jan. 15, 2008
Bernd Hartmann, Weisendorf, DE;
Werner Petri, Erlangen, DE;
Bernd Hartmann, Weisendorf, DE;
Werner Petri, Erlangen, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A hydraulic tensioning element for a traction mechanism drive having a cylinder, having an axially movable piston which is guided in the cylinder, a spring element which is arranged between the cylinder and the piston, a pressure space which is formed in the cylinder, and a reservoir, which is formed in the piston, for hydraulic fluid. A valve permits an exchange of the hydraulic fluid between the pressure space and the reservoir as a function of an actuating movement of the piston. The cylinder () has a flanged portion () which reduces a size of its opening, and a free end of the piston () has formed on it an annular section () with a diameter which is larger than the piston diameter.