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:
Apr. 01, 2003
Filed:
Apr. 12, 2001
Hans-Jürgen Drexl, Schonungen, DE;
Mannesmann Sachs AG, Schweinfurt, DE;
Abstract
An actuation device for a friction clutch which is arranged in the drivetrain of a motor vehicle between a drive unit and a transmission arrangement includes a pressure medium force cylinder arrangement for actuating the friction clutch via a release member having a release bearing arrangement. A measuring arrangement detects an actual release state, i.e., an instantaneous position of the release member. A control/regulating valve arrangement is connected with a pressure medium source, a pressure compensation opening, and with the pressure medium force cylinder arrangement. The pressure medium force cylinder arrangement is actuated depending on the actual release state and on a desired release state. The actuation device is adjustable in a defined manner between a non-actuation state and an actuation state, wherein the release bearing arrangement is decoupled from an associated release force receiving arrangement of the friction clutch in the non-actuation state and is coupled with the release force receiving arrangement in the actuation state.