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. 16, 1994
Filed:
Jun. 16, 1993
Kyohei Yamamoto, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An armature comprising a number of core sheets each having a number of slots and wherein a plurality of punched-in recesses for fitting are formed on the tail side of each core sheet and a plurality of punched-out protrusions for fitting provided by punching in said plurality of recesses are formed on the top side thereof, both by press-working; the core sheets being laminated by pressing the number of core sheets whereby said plurality of protrusions for fitting on the top side of each core sheet press-fit to said plurality of recesses for fitting on the tail side of a contiguous core sheet thereby positioning and integrally laminating the number of core sheets; wherein a plurality of protrusions for clearance each having a very small height are formed on the top side of each core sheet thereby providing a very small clearance between two of the contiguous core sheets.