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. 13, 1990
Filed:
Oct. 19, 1989
Steffen Hertrich, Herzogenaurach, DE;
Dieter Goppelt, Aurachtal, DE;
INA Walzlager Schaeffler KG, Herzogenaurach, DE;
Abstract
A tensioning device for belts, chains and the like, particularly for the camshaft drive of an internal combustion engine, the device comprising a tension pulley mounted on a movable carrier and a control element by which, when heating occurs, the carrier can be moved by an actuating member in the slackening direction of the belt against the action of a pressure spring, the control element comprising a hollow cylindrical sleeve and a pressure piston arranged therein for longitudinal displacement on whose part lying outside the sleeve a pressure member with a slanting contact surface forming an acute angle with the piston axis is fitted, the contact surface being in contact with a corresponding contact surface of the carrier of the tension pulley for increasing the working reliability of the control element so that automatic adjustment of a defined belt pretension is effected during operation.