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:
Jul. 22, 1980
Filed:
Mar. 23, 1978
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Abstract
A miniature electric motor including a shaft, at least one rotor coaxially mounted on the shaft and having a plurality of pole teeth angularly spaced from each other, at least one permanent magnet stator magnetized to provide north and south poles alternating at angular spacings corresponding to the angular spacings of the pole teeth, at least one annular exciting coil, and a yoke member made of magnetic material. The yoke member, exciting coil and stator are positioned relative to the rotor so that a magnetic flux developed by the exciting coil combines with the pole teeth of the rotor to form a magnetic loop. The motor further includes a motion translating mechanism located between the rotor and the shaft for converting the rotation of the rotor into a linear movement of the shaft.