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:
Dec. 04, 2001
Filed:
May. 13, 1999
Nicholas J. Colarelli, III, Creve Coeur, MO (US);
Michael W. Douglas, St. Peters, MO (US);
Paul Daniel Parker, Kirkwood, MO (US);
Hunter Engineering Company, Bridgeton, MO (US);
Abstract
A wheel balancer has an improved drive circuit and improved safety features. The drive circuit includes an H-bridge configuration, preferably utilizing MOSFET or IGBT transistors. The safety features include an electrical brake which operates upon removal of power to safely and reliably stop the rotation of the wheel/tire assembly being balanced. A hardware safety interlock is provided to limit rpm and/or travel of the wheel/tire assembly based upon preset criteria. A novel display system is included for displaying axial, radial, and/or loaded runout of the wheel/tire assembly.