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. 13, 2011
Filed:
Aug. 20, 2007
Rainer Petzold, Friedrichshafen, DE;
Mario Steinborn, Friedrichshafen, DE;
Markus Deeg, Eberdingen, DE;
Friedbert Roether, Cleebronn, DE;
Rainer Petzold, Friedrichshafen, DE;
Mario Steinborn, Friedrichshafen, DE;
Markus Deeg, Eberdingen, DE;
Friedbert Roether, Cleebronn, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A hydraulic or pneumatic control device for an automated shift transmission including actuating devices with actuating cylinders () having pressure spaces (). The pressure spaces () of the actuating cylinders () can be connected by a respective control valve () to a pressure line (), which can be selectively connected to or cut off from a main pressure line () by a main shut-off valve (). At least one additional main shut-off valve () is arranged in parallel with the first main shut-off valve () between the main pressure line () and the pressure line () to improve the control characteristics and increase the operational reliability.