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. 28, 2015
Filed:
Jun. 06, 2012
Hideki Tanaka, Hitachinaka, JP;
Masahiro Koyama, Tsuchiura, JP;
Masaki Mizuochi, Hitachinaka, JP;
Hiroshi Tsuji, Hitachinaka, JP;
Hideki Tanaka, Hitachinaka, JP;
Masahiro Koyama, Tsuchiura, JP;
Masaki Mizuochi, Hitachinaka, JP;
Hiroshi Tsuji, Hitachinaka, JP;
HITACHI HIGH-TECHNOLOGIES CORPORATION, Tokyo, JP;
Abstract
It is an object to balance suppression of a leakage magnetic field and driving performance. In a linear motor including a stator including a first yoke having an open face and two rows of permanent magnets linearly arrayed inside the first yoke so that S-poles and N-poles are alternate and a movable element arranged between the two rows of permanent magnets and linearly moving, a second yoke is connected to an open end of the first yoke so as to cover the open end of the first yoke and the permanent magnets when viewed from the open face of the first yoke.