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. 28, 1990
Filed:
Jul. 03, 1989
Applicant:
Inventors:
Carl E Kittle, Cedar Falls, IA (US);
Daniel J Harken, Waterloo, IA (US);
Seaton Moon, Cedar Falls, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180244 ; 180247 ; 192 / ; 192 / ;
Abstract
A clutch control system for the front wheel drive clutch of a four-wheel drive vehicle engages the front wheel drive clutch as a function of three brake-operated switches, a pair of manually-operated 'OFF-ON-AUTO' mode switches and a pair of speed responsive switches connected between a battery and the solenoid of a front wheel drive clutch control valve. The system engages the clutch when vehicle speed is above a limit speed and both service brakes are applied even when the mode switches are in their 'OFF' position wherein the clutch is normally disengaged.