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:
Feb. 07, 2011
Filed:
May. 01, 2008
Charles F. Long, Pittsboro, IN (US);
Phillip F. Mccauley, Zionsville, IN (US);
Darren J. Weber, Indianapolis, IN (US);
Scott E. Mundy, Carmel, IN (US);
Jeffrey E. Shultz, Zionsville, IN (US);
Charles F. Long, Pittsboro, IN (US);
Phillip F. McCauley, Zionsville, IN (US);
Darren J. Weber, Indianapolis, IN (US);
Scott E. Mundy, Carmel, IN (US);
Jeffrey E. Shultz, Zionsville, IN (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
An electro-hydraulic control mechanism for use with a multi-speed transmission includes a pair of logic valves, which are manipulated during the ratio interchanges and the ratio establishment by aiding in the distribution of fluid pressure from a plurality of trim valves. The logic valves are retained in specific drive ranges in the event of electrical discontinuance.