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:
Nov. 20, 1979
Filed:
Apr. 03, 1978
Applicant:
Inventors:
Donald L Hopkins, Joliet, IL (US);
Gordon W Johnson, Dunlap, IL (US);
Assignee:
Caterpillar Tractor Co., Peoria, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180-644 ; 60433 ;
Abstract
A vehicle includes a variable displacement fluid pump and a variable displacement hydrostatic motor for driving the tracks of the vehicle. An auxiliary reversible motor may be actuated in one and the other directions to provide steering of the vehicle through planetary drives associated with the tracks of the vehicle.