Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2008-09-02
2008-09-02
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R, C310S254100, C360S099080
Reexamination Certificate
active
11987342
ABSTRACT:
In a spindle motor in which teeth portions of a stator core formed by laminating magnetic plates are bent in order to increase the number of turns of the stator windings, a gap in the teeth portions between the magnetic plates is avoided and a precise attractive force adjustment becomes possible. The stator core is bent such that its teeth portions faces a surface of a rotor magnet at right angles, and the teeth portions and salient pole arm portions around which windings are wound are substantially parallel to each other. The salient pole arm portions locate approximately halfway between a lower surface of a hub and an upper surface of a base. Further, a thickness of a magnetic plate is set to be 0.5 to 0.9 times that of other portions.
REFERENCES:
patent: 3845340 (1974-10-01), Brooks et al.
patent: 4949000 (1990-08-01), Petersen
patent: 5694268 (1997-12-01), Dunfield
patent: 5859486 (1999-01-01), Nakahara et al.
patent: 6759784 (2004-07-01), Gustafson et al.
patent: 7190549 (2007-03-01), Byun et al.
patent: 7321178 (2008-01-01), Wakitani et al.
patent: 2004/0090701 (2004-05-01), Byun et al.
patent: 2006/0103248 (2006-05-01), Tamaoka
patent: 2000041349 (2000-02-01), None
patent: 2000083354 (2000-03-01), None
patent: 3052540 (2000-04-01), None
patent: 2000270504 (2000-09-01), None
patent: 2004-166497 (2004-06-01), None
patent: 2006-158188 (2006-06-01), None
Ashizaki Yoshihiro
Jyono Masahiro
Wakitani Akihiko
Yoshitsugu Takao
Matsushita Electric - Industrial Co., Ltd.
Nguyen Tran
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Spindle motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spindle motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spindle motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3950181