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:
Jan. 04, 2011
Filed:
May. 19, 2006
Leigh Fraser, Bilton Rugby, GB;
James Antony Lethbridge, Leamington Spa, GB;
Peter Riemer, Leamington Spa, GB;
Andrew Murray Watkins, Leamington Spa, GB;
Leigh Fraser, Bilton Rugby, GB;
James Antony Lethbridge, Leamington Spa, GB;
Peter Riemer, Leamington Spa, GB;
Andrew Murray Watkins, Leamington Spa, GB;
Schaeffler Technologies GmbH & Co. KG, Herzogenaurach, DE;
Abstract
A hydraulic clutch actuation system is provided having a hydraulic clutch control device which includes one first clutch master cylinder that communicates via a first pressure-medium line with a first clutch slave cylinder, which is used for actuating a first clutch device, and a second clutch master cylinder that communicates via a second pressure-medium line with a second clutch slave cylinder used for actuating a second clutch device, the pressure prevailing in the first and/or in the second pressure-medium line being relievable via at least one emergency release valve device to permit disengagement of at least one of the clutch devices in an emergency situation. The emergency release valve device includes a 4/2-way directional control valve which has a connection for the first pressure-medium line, a connection for the second pressure-medium line, a connection for a first pressure-relief line, which is connectable via the 4/2-way directional control valve to the first pressure-medium line, and a connection for a second pressure-relief line, which is connectable via the 4/2-way directional control valve to the second pressure-medium line.