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. 11, 1997
Filed:
Jul. 29, 1996
Mankong H Leung, Kokomo, IN (US);
Steven G Skiver, Kokomo, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
A pair of electromagnets having ferromagnetic cores with end adjacent a toothed ferromagnetic rotor are energized to induce temporary magnetic poles in the respective rotor teeth. A drive circuit selectively applies current to each electromagnet to effect rotational force on the rotor poles. Three changes in magnet current rotate the rotor to three successive stable positions, the third position being achieved when both magnets are energized to complete one step of the motor and then poles are again induced to start another step if desired. The magnetic properties of the rotor and cores are selected to insure that the pole strength in the teeth will be retained during the changes in electromagnet current.