Collet chuck

Claim 1

A CHUCK COMBINATION COMPRISING A COLLET HAVING AXIALLY JAWS EXTENDING FROM ONE END TO GRASP A BURR, A ROTATABLE HOLLOW SHAFT FOR SLIDINGLY RECEIVING THE COLLET, SAID SHAFT HAVING THEREIN TOWARD ONE END A RECESS OF ONE DIAMETER AND ADJACENT SAID RECESS A SECOND RECESS OF A LESSER DIAMETER FOR GUIDING AND URGING RADIALLY INWARD THE JAWS OF THE COLLET AND TERMINATING AT THE OPPOSITE END IN AN APERTURED RADIALLY INWARDLY DIRECTED SHOULDER PORTION, COLLET CAPTIVATING MEANS IN SAID ONE END OF THE HOLLOW SHAFT AND HAVING AN APERTURE THERETHROUGH TO RECEIVE THEREIN AND GUIDINGLY SUPPORT SAID BURR, SAID JAWS OF THE COLLET BEING SPACED APART AND HAVING EXTERNALLY TOGETHER A CIRCUMFERENTIAL SURFACE PORTION AT ONE END OF ONE DIAMETER RECEIVED IN SAID FIRST RECESS OF THE HOLLOW SHAFT AND THE BALANCE OF THE LENGTH THEREOF OF A UNIFORM LESSER EXTERNAL DIAMETER READILY RECEIVED AND GUIDED IN SAID SECOND RECESS OF THE HOLLOW SHAFT, SAID COLLET JAWS ON THE INSIDE THEREOF HAVING A TAPERED CIRCUMFERENTIAL PORTION AT SAID ONE END WITH THE TAPER INCREASING IN DIAMETER TOWARD SAID ONE END AND AN INTERNAL PORTION OF A UNIFORM DIAMETER TO RECEIVE, GUIDE AND GRASP A BURR WHEN INSERTED IN SAID CHUCK, SAID COLLET BEING SLID AXIALLY WITHIN SAID HOLLOW SHAFT WHEN A BURR IS INSERTED AND PUSHED THEREIN WHEREUPON SAID COLLET SLIDES WITHIN SAID HOLLOW SHAFT AND THE ENLARGED OUTER END THEREOF SLIDES FROM WITHIN THE FIRST RECESS PORTION TO THE SECOND RECESS SMALLER PORTION OF THE HOLLOW SHAFT AND THE JAWS ARE FORCED RADIALLY INWARDLY THEREBY TO GRASP SAID BURR.