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. 01, 1990
Filed:
Nov. 17, 1988
Applicant:
Inventor:
Boris A Shtipelman, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 / ; 310268 ; 310156 ;
Abstract
A stepper motor is disclosed which is comprised of planar elements. The motor comprises a disc-shaped rotor which includes a multipolar permanent magnet and generally planar stator coils mounted on opposite sides of the rotor. In order to provide a stepper motor which is efficient and is also relatively thin in the axial direction, generally planar pole plates having radially extending teeth are used to define the magnetic poles of the stator.