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. 17, 1998
Filed:
Jan. 15, 1998
Martin Scheidt, Adelsdorf, DE;
Ina Walzlager Schaeffler OHG, Herzogenaurach, DE;
Abstract
The invention relates in particular to a camshaft setting mechanism according to the vane cell principle, which has a drive gear (1) joined with the crankshaft through a toothed belt or a control chain. The drive gear includes a hollow space (8), and an impeller (11) is installed in the hollow space (8). The impeller is fixedly connected to and rotates with the camshaft (14). The drive gear (1) has at least one working chamber (4) on the interior of its circumferential wall (2), and each vane (12) of the impeller (11) subdivides the working chambers (4) into two pressure areas (9, 10) in each case. To avoid leakage through the slits (13) between impeller (11) and the drive gear (1) at high oil temperatures, the impeller (11) is made of a material which has a higher thermal expansion coefficient than the material of the drive gear (1), and that the pressure areas (9, 10) in the hollow space (7) of the drive gear (1) are sealed off by thermal expansion of the impeller (11) when the motor is in operation.