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:
Aug. 08, 1989
Filed:
Feb. 27, 1989
Steffen Hertrich, Herzogenaurach, DE;
Dieter Goppelt, Aurachtal, DE;
INA Walzlager Schaeffler KG, , DE;
Abstract
A tensioning device for belts, chains and similar components especially for the camshaft drive of an internal combustion engine comprising a tension roller mounted on a movable support and a control element by which the support can be moved by an actuating mechanism in the relaxing direction of the belt against the action of a pressure spring when the control element gets heated, characterized in that the control element has a cavity for receiving a pressure liquid whose volume varies as a function of the temperature, the cavity being closed by a membrane connected to the actuating mechanism which operates dependably for long periods of time.