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:
Mar. 28, 2006
Filed:
May. 26, 2004
Musibau O. Alowonle, Brooklyn Park, MN (US);
Bruce Phillip Bushey, Minneapolis, MN (US);
Robert J. Erko, Apple Valley, MN (US);
Paul Leonard Groschen, Jr., White Bear Lake, MN (US);
Richard F. Milun, Corcoran, MN (US);
Musibau O. Alowonle, Brooklyn Park, MN (US);
Bruce Phillip Bushey, Minneapolis, MN (US);
Robert J. Erko, Apple Valley, MN (US);
Paul Leonard Groschen, Jr., White Bear Lake, MN (US);
Richard F. Milun, Corcoran, MN (US);
Tennant Company, Minneapolis, MN (US);
Abstract
A control system for estimating the approximate relative position of an electric linear actuator on a surface maintenance machine. The control system includes device for selectively coupling the electric motor of the linear actuator to the electric power source, device for measuring or estimating the current and voltage of the electric motor, device for estimating the motor speed based on the measured values of current and voltage, and storage device for storing values of estimated motor speed and integrating device for determining approximate linear actuator position, wherein the integrating device integrates the motor speed over time to determine the approximate position of the linear actuator position.