Patent ID: 6488285
Filing Date: 2002-12-03
Classification: B23B,Y10T

Abstract:
A hydraulic chuck comprising:a chuck body extending in a longitudinal direction and including radially spaced inner and outer surfaces, the inner surface defining a wall of a bore having a longitudinally extending axis, the outer surface spaced from the bore wall in a direction extending radially outwardly with respect to the axis; at least one closed cavity disposed in the chuck body in radially spaced relationship to the bore wall and the outer surface, the at least one cavity extending circumferentially by a distance less than 360 degrees and containing an incompressible medium; and a pressurizing device communicating with the medium for pressurizing the medium to radially deform and expand the bore wall from a normal diameter to a larger diameter for enabling a member to be moved into or from the bore, and wherein a depressurizing of the medium causes the bore wall to radially retract to the normal diameter for clamping the member in the bore.