Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-04-12
2008-11-04
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S257000
Reexamination Certificate
active
07446442
ABSTRACT:
A stepping motor includes a rotatable cylindrical magnet circumferentially divided to be alternately magnetized with different magnetic poles, a first coil and a second coil disposed in positions where the first coil and the second coil are concentric with the magnet and hold the magnet therebetween from both axial ends, and a first cylindrical stator and a second cylindrical stator each having a tooth-shaped magnetic pole portion axially extending to face the magnet. In addition, a cylindrical bobbin is made of an insulator and on which at least one of the first coil and the second coil is wound. The bobbin includes an engaging portion engaged with the axially extending magnetic pole portion such that a predetermined positional relation is established between relative circumferential positions of the first stator and the second stator.
REFERENCES:
patent: 2919079 (1959-12-01), Winslow
patent: 5969453 (1999-10-01), Aoshima
patent: 6157107 (2000-12-01), Aoshima et al.
patent: 6201324 (2001-03-01), Suzuki et al.
patent: 6713936 (2004-03-01), Lee
patent: 6798093 (2004-09-01), Aoshima
patent: 7071593 (2006-07-01), Matsushita et al.
patent: 7173351 (2007-02-01), Ogawa
patent: 2003/0107274 (2003-06-01), Lee
patent: 2004/0124719 (2004-07-01), Aoshima et al.
patent: 6-237551 (1994-08-01), None
patent: 2003-9497 (2003-01-01), None
patent: 2003-009501 (2003-01-01), None
patent: 2003-70224 (2003-03-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Nguyen Tran
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