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:
Aug. 24, 1999
Filed:
Nov. 22, 1996
Toyonobu Yamada, Hisai, JP;
Shoji Fujimori, Yokkaichi, JP;
Kabushiki Kaisha Toshiba, Kanagawa-ken, JP;
Abstract
A laminated core for dynamoelectric machines and so on is formed of thin sheet core pieces each blanked into a predetermined configuration and stacked one upon another and are successively welded at a plurality of weld zones of an edge of each core piece by continuous or spot irradiation of laser beams so that the core pieces are combined together. The core piece constituting one of two end faces of the core has first notches formed in one half of the weld zones of the core piece. The core piece constituting the other end face of the core has second notches formed in one half of the weld zones of the core piece constituting the other end face of the core. The first notches are shifted from the second notches by 90 degrees.