Patent ID: 8033007
Filing Date: 2011-10-11
Classification: H02K,Y10T

Abstract:
1. A method of making a rotor, the method comprising: providing an elongated shaft; providing a non-elastic member around at least a portion of the elongated shaft, wherein the non-elastic member comprises a plurality of through-holes through its body; providing one or more ring magnets over the non-elastic member; arranging the non-elastic member relative to the elongated shaft such that the non-elastic member and the shaft define a space therebetween; and injecting a precursor of an elastic material into the space, which forms the elastic material to fill the space, thereby providing a vibration absorption member between the non-elastic member and the shaft, wherein the elastic material penetrates the through-holes of the non-elastic member and further extends outwardly to form a plurality of protrusions contacting the one or more ring magnets.