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:
Jun. 12, 2001
Filed:
Dec. 10, 1998
Applicant:
Inventors:
Hans-Jörg Domian, Immenstaad, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Walter Kuhn, Friedrichshafen, DE;
Assignee:
ZF Friedrichshafen AG, Friedrichshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60R 4/128 ; F16D 6/700 ;
U.S. Cl.
CPC ...
B60R 4/128 ; F16D 6/700 ;
Abstract
A power shift transmission (,) for motor vehicles in which instead of a hydrodynamic torque converter a controlled or regulated multiple disc clutch serves to assist starting. The loading of clutch is minimized by a fitted catch which prevents the motor vehicle from rolling in the opposite direction to the direction of travel intended by the gear selection. Catch can take the form of a mechanical catch, as sprag unit, or the form of an electronically adjusted catch which acts on one and/or more transmission brakes and/or clutches and/or into the service brake of the vehicle.