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. 08, 2016
Filed:
May. 13, 2011
Hiroshi Kaneshige, Tokyo, JP;
Akie Tanaami, Tokyo, JP;
Katsuya Fukushima, Tokyo, JP;
Aiko Tagawa, Tokyo, JP;
Hiroshi Kaneshige, Tokyo, JP;
Akie Tanaami, Tokyo, JP;
Katsuya Fukushima, Tokyo, JP;
Aiko Tagawa, Tokyo, JP;
THK CO., LTD., Shinagawa-ku, JP;
Abstract
Provided is a linear motor capable of preventing an increase in length of the armature in the moving direction and also of reducing cogging. The linear motor has a magnetic field part having a plurality of permanent magnets arranged in a straight line in such a manner that N poles and S poles are formed alternately; and an armature having a core which has a plurality of teeth arranged opposite to the magnetic field part with a gap created therebetween and a plurality of coils wound on the teeth of the core. Among the teeth with the coils wound around, a width TWin a relative moving direction of each of teeth placed at both ends in the relative moving direction of the armature is smaller, from a base part to an end part thereof, than a width TWin the relative moving direction of each of other teeth.