Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-07-26
2005-07-26
Le, Dang (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S254100, C310S216055
Reexamination Certificate
active
06921993
ABSTRACT:
Stator and base plate interface alignment is provided for a spindle motor, meeting design specifications such that motor performance is maintained. A portion of a surface of the stator is separated from the base plate. Accurate stator z-height, parallelism and concentricity are provided for use with a low profile disc drive memory system. In an aspect, laminations are formed about a stator and the bottom layer laminations are formed with a smaller diameter than the top layer lamination. The stator bottom layer laminations seat on a flat base plate machined surface, avoiding a base plate corner radius. Precise machining of a small corner interface of the base plate where a stator is typically seated and aligned with the base plate is made unnecessary. Component machining costs, wear and tear to machining systems, and machining process cycle times are reduced.
REFERENCES:
patent: 5173628 (1992-12-01), Yoshida et al.
patent: 5461271 (1995-10-01), Asama et al.
patent: 5578883 (1996-11-01), Sakashita et al.
patent: 6104570 (2000-08-01), Pelstring
patent: 6455961 (2002-09-01), Higuchi
Choo Victor C.
Hong YiRen
Lim PohLye
Xu Mo
Le Dang
Wax Law Group
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