Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuk Wai Elton Yeung0
Kam Wing Poon0
Date of Patent
September 21, 2010
0Patent Application Number
121211120
Date Filed
May 15, 2008
0Patent Primary Examiner
Patent abstract
An electric motor has a wound rotor having a shaft, a rotor core, a commutator and windings wound about the rotor core and connected to the commutator. It has a stator confronting the rotor; brush gear connecting the commutator to motor terminals; first and second bearings for rotatably supporting the rotor, and an oil stopper fitted to the shaft between the commutator and the first bearing for preventing oil migrating along the shaft from the first bearing reaching the commutator. The oil stopper is of high temperature material, preferably a metal such as brass, aluminum and steel.
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