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:
May. 08, 2012
Filed:
May. 18, 2009
Horst Leichsenring, Hohentengen, DE;
Berron Hairston, Friedrichshafen, DE;
Jochen Birkle, Tettnang, DE;
Thomas Aisenpreis, Friedrichshafen, DE;
Horst Leichsenring, Hohentengen, DE;
Berron Hairston, Friedrichshafen, DE;
Jochen Birkle, Tettnang, DE;
Thomas Aisenpreis, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A hydraulic circuit arrangement for operating a hydrodynamic torque converter () with a converter bridging clutch (). The circuit arrangement comprises a hydraulic switching unit () having at least one valve for controlling an inflow flow and a return flow of oil to the converter () and the converter bridging clutch (), an oil cooler (), a first line () for acting upon the converter bridging clutch () with an engagement pressure (P) and a second line () for acting upon the converter bridging clutch () with a disengagement pressure (P). The circuit arrangement comprises a bypass line () which is connected directly with the oil cooler () so as to bypass the hydraulic switching unit ().