Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2008-04-15
2008-04-15
Assouad, Patrick (Department: 2809)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S190000, C310S191000, C310S06800R
Reexamination Certificate
active
07358629
ABSTRACT:
The rotational torque of an electromagnetic actuator having a stator and rotor, such as a stepping motor, is increased.The electromagnetic actuator includes a rotor (30) having multiple magnetic poles (Nr1, Nr2, Nr3, Nr4, Nr5, Sr1, Sr2, Sr3, Sr4, Sr5) on a circumferential surface (31) and a plurality of stators (10, 20) in an electromagnet form. The stator (10, 20) has a pair of magnetic poles (13, 14, 23, 24) facing the circumferential surface (31) of the rotor (30), and an auxiliary yoke (40, 50) made of a soft magnetic material member extending in a circumferential direction (A) over an angular range (γ1, γ2) larger than a spread angle (α) of the magnetic poles (Nr, Sr) of the rotor (30) in the circumferential direction (A) is provided between the pair of magnetic poles (13, 14, 23, 24).
REFERENCES:
patent: 4782353 (1988-11-01), Ogihara et al.
patent: 5831356 (1998-11-01), Aoshima
patent: 6140731 (2000-10-01), Torok et al.
patent: 6316851 (2001-11-01), Maegawa et al.
patent: 6591066 (2003-07-01), Aoshima
patent: 7122920 (2006-10-01), Mizumaki
patent: 2004/0212274 (2004-10-01), Mizumaki
patent: 2005/0218743 (2005-10-01), Mizumaki
patent: 58-108762 (1983-07-01), None
patent: 2000253602 (2000-09-01), None
patent: 2001258221 (2001-09-01), None
patent: 2002-136095 (2002-05-01), None
patent: 2003-032991 (2003-01-01), None
patent: 2005110358 (2005-04-01), None
Ito Akihiro
Iwamoto Tetsuya
Morinaga Shinji
Tanaka Masato
Yamamoto Masami
Assouad Patrick
Desai Naishadh N
Honigman Miller Schwartz & Cohn LLP
Seiko Precision Inc.
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