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:
Sep. 02, 1986
Filed:
Sep. 09, 1983
Erkki A Koivunen, Livonia, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A power transmission combines a continuously variable belt drive in series relation with a multi-ratio gear arrangement between the transmission input and output shafts. The gear arrangement can be selectively changed between low and high ratios. In each gear ratio, the belt drive ratio is controlled from an underdrive ratio to an overdrive ratio to thereby provide two continuously variable drive ranges to effect an increase in output speed. A selectively operable transition clutch, controlling a chain drive disposed in parallel with the belt and gear drives, is provided to maintain power transmission between the input and output shafts during a ratio change in the gear arrangement while the belt drive ratio is changed from overdrive to underdrive.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile