Patent ID: 7766586

Claim:
A router chuck device for holding a tool having a tool shaft or a connecting collet, said device comprising: A chuck body including a central longitudinally extending bore therein of a predetermined circumferential shape for receiving the shaft or collet of the tool, and a pivotable portion moveable between a rest position wherein the predetermined circumferential shape of the bore is maintained and there is no engagement between the pivotable portion and the shaft or collet of the tool received in the bore, and an operative position wherein a bore-facing surface of said pivotable portion extends inwardly into said bore so as to engage the shaft or collect of the tool received in said bore; and a fastener member, received in an aperture in said chuck body, for, in use, causing pivoting of said pivotable portion of said chuck body to said operative position thereof so that the bore-facing surface of said pivotable portion engages the shaft or collet of the tool received in said bore; Said chuck body including a tapered portion through which said bore extends and wherein said chuck device comprises a nut adapted to be affixed to said tapered portion; and Wherein said chuck body is formed integrally with a main motor shaft of a motor-driven drive device, and said motor shaft including an electrical armature affixed thereto.