Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-06-21
2005-06-21
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S091000
Reexamination Certificate
active
06909209
ABSTRACT:
A stepping motor comprises a rotor assembly and a stator assembly. The stator assembly includes first and second stator units arranged horizontally on a same plane. Each stator unit is composed of: upper and lower stator yokes, which are shaped substantially semi-annular, arranged squarely opposite to each other in parallel, each have a plurality of pole teeth formed along its inner circumference so as to surround the rotor assembly, and which are coupled to each other with their respective pole teeth opposing each other so as to intermesh; a coil for exciting, wound rectangularly, and having its axis located outside the rotor assembly so as to be sandwiched between the upper and lower stator yokes; and a spacer shaped substantially in rectangular parallelepiped, oriented parallel to the axial direction of the rotor assembly, and inserted through the coil.
REFERENCES:
patent: 5703419 (1997-12-01), Mizutani
patent: 5708406 (1998-01-01), Tsunoda et al.
patent: 6023118 (2000-02-01), Gutris
patent: 08-182298 (1996-07-01), None
patent: 10-094237 (1998-04-01), None
patent: WO 00/72429 (2000-11-01), None
Matsushite Kunitake
Nagata Toshihiko
Sano Hiroshi
Lam Thanh
Minebea Co. Ltd.
Wallenstein Wagner & Rockey Ltd.
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