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:
Jan. 15, 2008
Filed:
Mar. 06, 2007
Ronald A. Johnston, Longview, TX (US);
Dwight Baker, Longview, TX (US);
Nelson L. Stoldt, Longview, TX (US);
Paul K. Schufeldt, Longview, TX (US);
Peter J. Bradley, Longview, TX (US);
Ronald A. Johnston, Longview, TX (US);
Dwight Baker, Longview, TX (US);
Nelson L. Stoldt, Longview, TX (US);
Paul K. Schufeldt, Longview, TX (US);
Peter J. Bradley, Longview, TX (US);
LeTourneau Technologies, Inc., Houston, TX (US);
Abstract
A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engine, such as a diesel engine, which may run at a substantially constant RPM. A digital control system provides operator displays and controls power conversion from the generator, as well as providing maintenance and control functions for the switched reluctance motors. A heavy-duty hoisting apparatus electrically drives a hoisting mechanism using an SR motor, providing power for lifting a load. The heavy-duty hoisting apparatus may include an engine and generator or provide power to the SR motor from an external source.