Quick change power tool chuck
OwnerJohn L. DeRosainventor
Life of this patent
Estimating the term…
Abstract
An improved quick change power tool chuck is provided which is principally used on a wood working router but could also be used in many other power tool applications. Key features of the quick change chuck include the unique way that it secures the cutting bit from unwanted slippage, the large mechanical advantage thereof and the speed in which a cutting bit can be removed and replaced. The chuck can be aligned and attached to the power tool in the same manner that a standard collet is aligned and attached to the router spindle or to a router or other drive shaft in a number of different ways.
Claims9
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.
Dependencies are inferred from the claim text.