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:
Aug. 29, 1995
Filed:
Oct. 21, 1993
Applicant:
Inventor:
Robert B Deady, Plymouth, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
74329 ; 74335 ; 477130 ;
Abstract
A countershaft type power transmission has a plurality of hydraulically actuated synchronizers which are selectively operable to establish the gear ratios in the transmission. Each synchronizer is effective to control one or more ratios and is positionable between neutral positions. A hydraulic control system is provided to control the movement of the synchronizers and to hydraulically force each synchronizer to neutral when it is not called upon for ratio establishment.