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. 28, 2014
Filed:
Dec. 14, 2012
Caterpillar Paving Products, Inc., Brooklyn Park, MN (US);
Thomas M. Sopko, Jr., East Peoria, IL (US);
Ryan T. Thiesse, Otsego, MN (US);
Robert J. Lord, Waukesha, WI (US);
Toby A. Frelich, Saint Michael, MN (US);
Edward Lee Zwilling, Washington, IL (US);
Robert Wayne Lindsey, Washington, IL (US);
Rodwan T. Adra, Peoria, IL (US);
Caterpillar Paving Products Inc., Minneapolis, MN (US);
Abstract
A paving machine for laying a mat of paving material on a paving surface includes a generator, such as a switched reluctance generator, integrally installed with a pump drive and operatively connected to an output shaft of a power source of the paving machine. The generator outputs AC power to a power converter that in turn outputs DC power for a plurality of screed heating elements to produce heat to warm a screed. The paving machine may also include an insulation monitoring system for determining the occurrences of ground faults in the electrical components by comparing current levels in the components to a predetermined maximum current level. A controller of the paving machine may monitor the temperature of the generator and produce the speed of the power source to prevent overheating.