Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-01-17
2009-12-29
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S216006, C310S254100, C310S261100
Reexamination Certificate
active
07638907
ABSTRACT:
A step motor mounted inside a camera for moving a driven member is disclosed to include a yoke iron, which has a base, two arms respectively extended from two sides of the base, and four magnetic poles respectively formed on the free ends of the arms and each junction between the base and the arms, two windings respectively surrounding the two arms of the yoke iron, a magnet, which is rotatably floating among the magnetic poles of the yoke iron by a magnetic force has sectors of different magnetic poles abutted against one another, and a crank, which is coupled to and rotatable with the magnet and has an actuating axle connected to the driven member of the camera for moving the driven member upon rotation of the magnet.
REFERENCES:
patent: 7338221 (2008-03-01), Oishi et al.
patent: 2006/0152093 (2006-07-01), Oishi et al.
patent: 2006/0186742 (2006-08-01), Miyawaki
patent: 2007/0018513 (2007-01-01), Yamamoto et al.
Bacon & Thomas PLLC
Lam Thanh
Tricore Corporation
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