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:
Sep. 18, 2001
Filed:
Aug. 28, 2000
Jens Schäfer, Herzogenaurach, DE;
Martin Steigerwald, Herzogenaurach, DE;
Matthias Kapp, Hemhofen, DE;
INA Walzlager Schaeffler oHG, , DE;
Abstract
A locking mechanism for a device (,) to modify the control timing of cylinder valves of an internal combustion engine, in particular for a vane-cell positioning device. The device (,) consists of a drive wheel (,) driven by a crankshaft of the internal combustion engine, said drive wheel having a cavity (,), and an impeller (,) permanently connected to the camshaft (,) that has at least one vane (,). In the cavity (,) of the drive wheel (,), at least one working chamber (,) is formed by intermediate walls (,) and each of these chambers is divided by an associated vane (,) into two hydraulic pressure spaces (,). When pressure is applied by means of a hydraulic pressure medium, the pressure spaces (,) effect a pivoting motion of the impeller (,) with respect to the drive wheel (,), whereas when the pressure is not applied to one of the pressure spaces (,) the impeller (,) and the drive wheel (,) are mechanically coupled together. The mechanical coupling between the impeller (,) and the drive wheel (,) of the device (,) is accomplished by at least one axially moving vane (,) of the impeller (,) which is designed both as a vane pivoting element and as a locking element.