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. 10, 2015
Filed:
Dec. 30, 2011
Christian Bauer, Munich, DE;
Tobias Schmid, Bronnen, DE;
Christian Bauer, Munich, DE;
Tobias Schmid, Bronnen, DE;
IWIS Motorsysteme GmbH & Co., KG, Munich, DE;
Abstract
A tensioning device for a continuous drive element includes a housing, a tensioning piston movably guided in the housing, and a pressure chamber for hydraulic fluid formed between the housing and the tensioning piston, wherein the tensioning piston comprises a vent opening, and a vent channel between the pressure chamber and the vent opening, formed by assembling at least two vent elements, wherein in the one vent element, in the contact surface to the second vent element, separate partial areas of the vent channel are formed by molded groove sections which are connected to each other by transfer grooves molded in the second vent element in the contact surface to the first vent element, such that sections of a main portion of the cross-section of flow of the vent channel are arranged on one side, and sections are arranged on another side of a plane spanned by the contact surfaces.