Patent ID: 7198277

Claim:
A chuck assembly comprising: a support structure adapted to be secured to a lathe spindle; a plurality of jaws mounted upon said support structure with at least one of said jaws being radially moveable, said jaws adapted to releasably clamp a vehicle wheel in a position relative to said support structure; a plurality of moveable counterweights mounted upon said support structure opposite, each of said moveable counterweights mounted opposite from said moveable jaws, each of said moveable counterweights mounted opposite from said associated jaw and connected thereto by one of a plurality of connecting bars positioned in non-interesting parallel planes spaced apart from said support structure such that said connecting bars pass by one another, each of said connecting bars including a slot, each counterweight being operable to counteract centrifugal forces urging each associated jaw away from the center of said support structure upon rotation of said support structure; and a guide pin mounted upon said support structure, said guide pin extending through said slot.