Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-10-23
2007-10-23
Trinh, Minh (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S598000, C029S605000, C310S216006
Reexamination Certificate
active
11314237
ABSTRACT:
In a method of manufacturing a rotor of a rotary electric machine, a rotor core is formed by preparing a material sheet in a form of a belt. The material sheet has teeth extending from a first side of a middle portion of the material sheet and projections projecting from a second side of the middle portion in a direction opposite to the teeth. The projections define recesses therebetween. Each projection and each recess has substantially the same dimension with respect to a centerline between a first line passing through tops of the projections and a second line passing through bottoms of the recesses. The material sheet is helically wound so that the projections are located on an inner diameter side of a rotor core.
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Niimi Masami
Ohmi Masanori
Shiga Tsutomu
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