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:
Mar. 17, 1987
Filed:
Sep. 24, 1985
Applicant:
Inventors:
Stanley M Gregerson, Cedar Falls, IA (US);
Robert E Haight, Waterloo, IA (US);
Timothy J Mattson, Austin, TX (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
192-357 ; 74850 ;
Abstract
A control system for preventing engagement of a transmisson when its power source is started with the transmission in gear. The system uses a control valve, an engagement override valve, a check valve and a relief valve to interrupt fluid flow to clutch or brake elements during initial startup unless the transmission is in neutral or park. Unwanted triggering of the override system upon a reduction of hydraulic pressure is avoided in this control system. The control valve of this system may be made responsive to clutch pedal or shift lever movement.