Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-02-14
2006-02-14
Mullins, Burton S. (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
Reexamination Certificate
active
06998745
ABSTRACT:
An apparatus for and a method of construction of a spindle motor having a bearing unit, a rotary shaft, a rotary hub member and an electro-magnetic motor is presented. The rotary shaft has a flange attached at a mid-section in an axial direction, between large and small diameter sections of the rotary shaft. Grooves between the bearing unit, rotary shaft and flange create radial dynamic pressure generating areas, each with as long as possible a span, and thrust dynamic pressure generating areas to both sides of the flange.
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Horiuchi Toshimitsu
Kull Andreas
Elkassabgi Heba
Lutzker Joel E.
Minebea Co. Ltd.
Mullins Burton S.
Schulte Roth & Zabel
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