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:
Apr. 04, 1978
Filed:
Dec. 13, 1976
Carl A Lentz, Mooresville, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A multiratio powershift transmission having automatic shift valves normally operative in response to output speed governor pressure and throttle pressure to automatically upshift the transmission to higher ratios with increasing speed with the upshift at higher speeds with increasing throttle. A back-up governor pressure system having an input governor pressure regulated by a pressure regulator valve to provide a reduced modified governor pressure in first ratio and operative in response to progressively higher ratio signals to progressively increase the reduced pressure to provide a modified input governor pressure varying with output speed similar to output governor pressure which is used instead of output speed governor pressure to provide a similar shift schedule relative to output speed.