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:
Jul. 23, 2013
Filed:
Sep. 30, 2009
Applicants:
Hans Hofler, Immenstaad, DE;
Thomas Kurz, Langenargen, DE;
Inventors:
Hans Hofler, Immenstaad, DE;
Thomas Kurz, Langenargen, DE;
Assignee:
ZF Friedrichshafen AG, Friedrichshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H 59/36 (2006.01); F16H 59/00 (2006.01); F16H 45/02 (2006.01); G06F 7/70 (2006.01); B60W 10/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of operating the torque converter lock-up clutch in a power transmission of a working machine comprising at least one hydraulically actuated lifting device. The torque converter lock-up clutch is actuated for disengagement when a predefined limit value for the position of the lifting hydraulic mechanism of the at least one lifting device is exceeded. When the position of the lifting hydraulic mechanism falls below a predefined limit value and when the turbine rotational speed exceeds a predefined threshold value, the torque converter lock-up clutch is reengaged.