Patent ID: 7516535

Claim:
A rotor assembly for mounting a rotor to a motor shaft, comprising: a rotor having a thickness, a first face, a second face, a main aperture having a first half and a second half, a first side aperture having a first top portion and a first bottom portion with said first top portion being wider than said first bottom portion and said first bottom portion being open to said second half of said main aperture, and a second side aperture having a second top portion and a second bottom portion with said second top portion being wider than said second bottom portion and said second bottom portion being open to said second half of said main aperture, wherein said first half of said main aperture is generally a half circle having a first diameter and said second half of said main aperture is generally a half circle having a second diameter, said first diameter being smaller than said second diameter; a first fastener adapted to be disposed within said first side aperture; a second fastener adapted to be disposed within said second side aperture; and a collar having an exterior curve, an interior curve, a first end, and a second end and being adapted to be disposed within said second half of said main aperture, said first end having a means for receiving a first fastener, and said second end having a means for receiving a second fastener.