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:
Dec. 26, 2000
Filed:
Nov. 05, 1997
Isamu Takehara, Narashino, JP;
Seiko Seiki Kabushiki Kaisha, , JP;
Abstract
A motor armature having a simplified assembly comprises an inner cylinder and an outer cylinder arranged coaxially, and a plurality of pole pieces provided radially at equal intervals between the inner and outer cylinders. The inner cylinder is formed into a cylindrical shape by curling up in the longitudinal direction a first hoop member (band steel) formed of a magnetic material and having a predetermined thickness and length. The outer cylinder is formed of a second hoop member similar to the first hoop member. The pole pieces each comprise a wire piece cut from a wire formed of a magnetic material and having a coil would thereon. One end of each pole piece is welded to one of the hoop members and the other end of the pole pieces is welded to the other hoop member.