| US 7,475,843 B2 | ||
| Winding jig, polygonal coil, and method of manufacturing polygonal coil | ||
| Takashi Ueki, Nishiokitama-gun (Japan); Teruo Tamada, Yonezawa (Japan); Teiji Wagatsuma, Yonezawa (Japan); Takashi Fujimi, Yonezawa (Japan); and Koichi Igarashi, Yonezawa (Japan) | ||
| Assigned to Yonezawa Electric Wire Co., Ltd., Yamagata-ken (Japan) | ||
| Filed on Mar. 07, 2008, as Appl. No. 12/75,132. | ||
| Claims priority of application No. P2007-063619 (JP), filed on Mar. 13, 2007; and application No. P2008-043473 (JP), filed on Feb. 25, 2008. | ||
| Prior Publication US 2008/0223974 A1, Sep. 18, 2008 | ||
| Int. Cl. B21F 3/04 (2006.01) | ||
| U.S. Cl. 242—437.4 [242/432.6; 242/433.4; 242/437] | 10 Claims |
| 1. A winding jig comprising a core on which a conductive wire or a single metal wire is wound and collar portions disposed
at both ends of the core so as to be opposed to each other,
wherein a plurality of rod-shaped protrusions is disposed on at least one of the opposed surfaces of the collar portions so
as to protrude in a radial shape centered on an end of the core.
|