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:
Nov. 05, 2013
Filed:
Mar. 14, 2011
Lucian Botez, Novi, MI (US);
Lucian Botez, Novi, MI (US);
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A hydraulic tensioner for a traction element drive of an internal combustion engine, is provided having a tensioner housing with a hollow piston located in the housing bore. A check valve is located in the bore along a pressurized fluid path to the hollow piston, and a spring guide located in the housing in proximity to a base of the bore. A tensioning spring extends from the spring guide inside the hollow piston toward the piston head. A pressure relief valve is located within the hollow piston adjacent to the piston head, with the pressure relief valve including a valve body having a flange with a support surface that rests against an inside of the piston head and a hollow spring guide that extends from the flange toward the base of the bore. A valve seat is formed in the hollow spring guide, and a spring is located in the hollow spring guide and biases a valve ball against the valve seat. At least one of the support surface of the flange, the valve seat or the valve ball include surface indentations or irregularities that allow gas venting through the pressure relief valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile