Patent ID: 7548007

Claim:
A rotor comprising: a support member having a peripheral portion and an interior rim, the interior rim having a plurality of protruding members that define a central opening and diverge from the peripheral portion, wherein at least one of the protruding members diverges downwardly from the peripheral portion relative to a horizontal and at least one of the protruding members diverges upwardly from the peripheral portion relative to a horizontal so that ends of the protruding members are spaced from each other in a direction that is substantially parallel to the shaft, and wherein the plurality of protruding members that define the central opening and diverge from the peripheral portion terminate at the interior rim: a shaft coupled within the central opening of the support member; molded material fixedly coupling the shaft to the support member; an impeller or propeller coupled to the support member; and an annular magnet circumscribing an interior of the support member.