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:
Mar. 04, 2008
Filed:
May. 07, 2004
Adolf Bucher, Kressbronn, DE;
Anton Fritzer, Markdorf, DE;
Tobias Pfleger, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A device for the hydraulic control of an automatic transmission, especially a continuously variable automatic transmission. The control system comprises a forward/reverse drive unit (), which is controlled by way of at least a first and a second shifting component (). The shifting components () are in turn controlled via at least two valves (), which are pressurized by way of a pressurized medium pump (). A gear selector device () selection is made among at least a forward gear (D), a neutral gear (N) and a reverse gear (R), wherein the selector device () possesses a non-mechanical connection to the transmission control system.