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:
Sep. 08, 1992
Filed:
Jun. 08, 1990
Applicant:
Inventor:
James K Lee, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318138 ; 318254 ; 318439 ; 388815 ; 310156 ; 310268 ;
Abstract
An electric motor is disclosed which is of the brushless D.C. type and comprises a generally planar rotor and a generally planar stator. The rotor is a multipolar permanent magnet, and the stator includes a planar coil having a plurality of windings. In order to provide a motor which can supply a high torque at a relatively low speed and a low torque at a high speed, the stator includes a low speed coil which includes a large number of windings of fine wire and a high speed coil which includes a smaller number of windings of coarse wire.