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. 24, 1991
Filed:
Oct. 20, 1988
Applicant:
Inventors:
Donald E McGovern, Dubuque, IA (US);
Stanley L Irwin, Dubuque, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180133 ; 180132 ; 180152 ; 418613 ;
Abstract
A secondary hydraulic steering system being automatically triggered and manually actuated. The steering system is provided with a dual displacement fluid meter having a fluid pressure sensing valve for selecting the operational configuration in which the fluid meter is operated. The fluid pressure sensing valve is hydraulically coupled to the source of pressurized fluid and in response to a loss of fluid pressure shifts the dual displacement fluid meter into a reduced displacement configuration so that the operator has greater mechanical advantage.