Metal deforming – With cutting – By shearing tool-couple
Reexamination Certificate
2005-10-11
2005-10-11
Crane, Daniel C. (Department: 3725)
Metal deforming
With cutting
By shearing tool-couple
C072S339000, C072S448000, C029S596000, C083S699410
Reexamination Certificate
active
06952943
ABSTRACT:
A rotor assembly for an electric motor comprising rotor elements each having a body portion and pole portions formed integrally as a pressing from strip steel, Each successively formed rotor element is formed with its pole portions offset relative to its body portion by an amount different from the offset on the previously formed rotor element. The rotor elements are produces by the use of a progressive die assembly to punch the rotor elements from strip material. At least part of the pole portion of the rotor element is produced by a first die member, and at least a part of the body portion is produced by a second die member. Relative movement is effected between the first and second die members between successive punching operations to change the pole portion offset.
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Crane Daniel C.
European Electrical Laminations Limited
MacMillan Sobanski & Todd LLC
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