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:
Jun. 30, 1981
Filed:
May. 29, 1979
Applicant:
Inventors:
Noboru Masuda, Tokyo, JP;
Masakazu Sugimoto, Tokyo, JP;
Assignee:
Denki Onkyo Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318119 ; 318653 ;
Abstract
A rotary actuator comprise a stator defining a cylindrical space and formed with a pair of diametrically opposite main magnetic poles adapted to be magnetized to the same polarity, a pair of drive coils disposed on the main poles, a drive circuit for energizing the drive coils, and a rotor having a plurality of pairs of magnetized zones separated by non-magnetized zones, all disposed around the circumference of the rotor, adjacent magnetized zones being of opposite polarities.