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:
Feb. 03, 2009
Filed:
Jul. 25, 2003
Corneliu Dragoi, London, CA;
Attila Simofi-ilyes, London, CA;
Andrew Lakerdas, London, CA;
Siemens Canada Limited, Chatham, CA;
Abstract
A speed control and stall protection systemfor an electric DC brush motor includes a DC brush motor M. At least one relay Kis connected between the motor and a power supply. A speed sensing circuitis constructed and arranged to generate a signal indicative of a speed of the motor. A motor control and protection circuitis constructed and arranged to receive 1) the signal from the speed sensing circuit and 2) a control signal input for operating the at least one relay to control operation of the motor. When a stall condition is determined based on the signal from the speed sensing circuit, the motor control and protection circuit is constructed and arranged to control the at least one relay to disconnect power to the motor.