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:
Jul. 02, 1985
Filed:
Sep. 27, 1982
Richard G Hennessey, Oak Lawn, IL (US);
Richard B Beemer, Lombard, IL (US);
Harold W Melles, Downers Grove, IL (US);
J. I. Case Company, Racine, WI (US);
Abstract
A transmission system particularly useable for transmitting power from an internal combustion engine to the driving wheels of a vehicle such as a tractor. The system includes a multiple ratio mechanical range transmission coupled to a speed transmission via a manually operable master clutch. A high slip fluid coupling is used to couple the speed transmission to the engine, and an electronically controlled lockup clutch locks the impeller of the fluid coupling to the output turbine of same when the speed of the engine exceeds a first predetermined speed, and maintains the coupling locked until the speed of the engine drops below a second substantially lower predetermined speed; the difference between the predetermined speeds is due to a speed comparator hysteresis which serves to prevent hunting during automatic gear shifts between different ratios.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile