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:
Oct. 05, 1999
Filed:
Jul. 15, 1997
Applicant:
Inventor:
David C Orr, Dunlap, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
322 29 ; 290 14 ; 180 654 ;
Abstract
A method and apparatus for supplying electrical power in an earth moving machine is provided. The method and apparatus includes an engine adapted to deliver primary power at a variable speed to the earth moving machine. A hydraulic system is connected to and driven by the engine. The hydraulic system in turn is connected to and drives a work implement. A variable input speed, constant output generator system is connected to and driven by the engine at a variable speed. The generator delivers electrical power at a constant value independent of variations of the speed of the engine. There is at least one auxiliary system adapted to receive the electrical power.