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:
Dec. 27, 2011
Filed:
Apr. 25, 2007
Rainer Petzold, Friedrichshafen, DE;
Franz Bitzer, Friedrichshafen, DE;
Rainer Petzold, Friedrichshafen, DE;
Franz Bitzer, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A clutch actuator (), as well as a method for operating a clutch (), between the drive motor and the transmission () of a motor vehicle. The clutch actuator includes a cylinder with a piston () and an actuator (), such that a clutch release bearing (), arranged co-axially to the central axis of the clutch, may be operated to apply an axial pre-tensioning force on the clutch release bearing and conduct an operating medium into the clutch actuator for axially displacing the piston and/or the clutch release bearing. To simplify a clutch actuator of this type and enhance its utilization, the clutch actuator is configured and used for generating the pre-tensioning force.