Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-03-28
2008-10-28
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156430, C310S156470, C310S257000
Reexamination Certificate
active
07443061
ABSTRACT:
A driving device which is capable of delivering higher power and can be reduced in size. A hollow-cylindrical magnet (1) is magnetized so as to have circumferentially alternately different poles. First and second coils (2and3) are arranged concentric with the magnet (1) on respective axially opposite sides thereof. Tooth-shaped first and second outer magnetic pole parts (8A,8B,8C,8D,9A,9B,9C, and9D) are arranged in opposed relation to the magnet (1) to extend from respective opposite end faces of the magnet (1), for being magnetized by the first and second coils (2and3). A rotary shaft (10) fixed to an inner periphery of the magnet (1) is formed with an inner magnetic pole part (10A) disposed in opposed relation to the first and second outer magnetic pole parts (8A,8B,8C,8D,9A,9B,9C, and9D), for being magnetized by the first and second coils (2and3). The first and second outer magnetic pole parts (8A,8B,8C,8D,9A,9B,9C, and9D) are each formed into a spiral shape.
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Canon Kabushiki Kaisha
Nguyen Tran
Rossi Kimms & McDowell LLP
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