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:
Apr. 09, 2019
Filed:
Nov. 18, 2014
Schaeffler Technologies Ag & Co. KG, Herzogenaurach, DE;
Markus Fischer, Hessdorf, DE;
Friedrich Ness, Dachsbach, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A hydraulic tensioning device, which is used in traction drives of internal combustion engines and which includes a piston () that is supplied with a hydraulic fluid, is provided. The piston is movably guided in a linear manner in a cylinder and is spring-loaded against a traction device. The hydraulic fluid can flow into a pressure chamber () via a non-return valve or out of the pressure chamber () via a pressure-relief valve (), depending on an adjustment movement direction of the piston (). For this purpose, the pressure-relief valve () is inserted in a central receiving area () of the piston () on the pressure-chamber side as a premountable valve group () and includes a pot-shaped valve housing () and into which a guide element () with a corresponding valve seat (), a valve element designed as a valve plate (), and a pressure spring () are integrated.