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. 02, 1995
Filed:
Apr. 05, 1993
Edward N Sickafus, Grosse Ile, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A planar micro-motor and method of fabricating it are disclosed. The planar micro-motor comprises a stator supported by the substrate and preferably comprising a plurality of circumferentially spaced micro-coils lying in a first plane. The micro-motor also has rotor comprising a plurality of magnetic regions circumferentially spaced about a shaft for rotation in a second plane parallel to, and spaced from, the first plane. Actuating elements selectively energize subsets of the micro-coils to generate electromagnetic fields acting on the magnetic regions of the rotor across the planar gap sandwiched between the micro-coils and the rotor. The amount and direction of rotation of the rotor can be controlled. The planar micro-motor can be employed as a stepper motor. It can be fabricated using microfabrication techniques.