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:
Nov. 02, 2021
Filed:
Mar. 05, 2019
Minebea Mitsumi Inc., Nagano, JP;
Minoru Kuroda, Sakaiminato, JP;
MINEBEA MITSUMI INC., Nagano, JP;
Abstract
A motor includes a rotary shaft, an armature part, a frame including a tubular portion surrounding the armature part, and a plurality of magnets. The tubular portion is formed of a magnetic body. The tubular portion includes a plurality of flat parts and a plurality of curved parts. Each of the plurality of flat parts and each of the plurality of curved parts being alternately arranged in a peripheral direction. On an inner surface of the tubular portion in each of the plurality of curved parts, a plurality of magnetic poles are provided. A magnetic gap is provided in a radial direction, the magnetic gap being formed by the inner surface of the tubular portion in each of the plurality of flat parts and the armature part.