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:
May. 11, 1999
Filed:
Dec. 16, 1997
Fred N Miekka, Sierra Madre, CA (US);
Peter W Mackie, Sierra Madre, CA (US);
Other;
Abstract
A brushless direct current (DC) electric motor includes a rotor and a stator. The rotor has at least one disc mounted to a central shaft. The disc has an outer portion consisting of permanent magnets. The magnets are mounted with their direction of magnetization transversing through the disc. The stator includes C-shaped electromagnets which straddle the disc and are mounted with their magnetic poles aligned in coupling proximity to the poles of the permanent magnets in the disc. Position circuitry senses a position of the permanent magnets with respect to the electromagnets and then provides a signal based on the position to the electromagnets to cause the rotor to rotate.