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:
Oct. 30, 2001
Filed:
Nov. 15, 1999
Takashi Tokizawa, Nisshin, JP;
Katsumi Nagasaka, Obu, JP;
Masahiro Asano, Anjo, JP;
Toshihiko Fujimoto, Tokai, JP;
Katsumi Matsumoto, Okazaki, JP;
Katsuyoshi Shiraishi, Chiryu, JP;
Kazutaka Maeda, Toyota, JP;
Satoru Nejigane, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
An apparatus for forming a spirally wound stator core includes a pair of forming rollers having a wedge-shaped gap therebetween, a winding drum, a drum-drive motor, and a roller presser. A strip of magnetic material is inserted into the wedge-shaped gap to be pressed at a controlled pressure so that the strip is bent into a spiral with one side of the strip being radially inside. The controlled pressure is changed automatically according to a memorized relationship between the rotation speeds of the pair of forming rollers and suitable pressures applied to the strip.