Patent ID: 6149357
Filing Date: 2000-11-21
Classification: B23B,Y10T

Abstract:
An assembly positionable on a spindle of a machine tool for securing a workholding apparatus in position on said machine tool, said assembly having an axis of rotation which is coincident with an axis of rotation of said spindle when said assembly is positioned on said machine tool, said assembly comprising:a first end portion having a periphery, an opening extending therethrough and arranged about said axis, and first and second end surfaces with said first end surface being positionable adjacent said spindle, said second end surface including an axial projecting portion located radially inward of said periphery with said axial projecting portion having an inner surface,a second end portion arranged adjacent said second end surface of said first end portion, said second end portion comprising an opening arranged about said axis and extending through said second end portion between a first end surface and a second end surface, said second end portion further comprising an inner recess having an inner face and an inner wall,a chamber defined by said inner recess and said second end surface of said first end portion when said first and second end portions are positioned together,a piston arranged in said chamber, said piston being axially movable in said chamber and comprising an opening arranged about said axis, said piston having a first end surface and a second end surface with said first end surface being located adjacent said second end surface of said first end portion, said piston further comprising means for releasably attaching said workholding apparatus,resilient means located between said second end portion and said piston for resiliently holding said first surface of said piston in abutment with said second surface of said first end portion.