Patent ID: 6402160
Filing Date: 2002-06-11
Classification: B23B,Y10S,Y10T

Abstract:
A chuck for use with a power driver having a rotatable spindle, said chuck comprising:a generally cylindrical body defining a tail section configured to rotate with said spindle of said power driver and a nose section having an axial bore formed therein; a plurality of jaws in communication with said axial bore; a generally cylindrical sleeve rotatably mounted about said body; a driving disk rotatably mounted about said body in communication with said sleeve so that said sleeve rotationally drives said driving disk and in driving engagement with said jaws so that rotation of said driving disk by said sleeve and with respect to said body moves said jaws toward or away from the axis of said axial bore, depending on the direction of said rotation, and so that said jaws are tightened to a final closed position through said rotation; and a bearing that is non-compressible axially with respect to said bore and that is disposed between said driving disk and said body so that rearward axial force is transferred from said driving disk to said body through said bearing when said jaws close onto a tool received in said axial bore, said bearing including a first race, a second race, and a plurality of bearing elements disposed between said first race and said second race, wherein said first race defines a plurality of recesses therein and wherein one of said second race and said bearing elements is disposed in communication with said first race so that, when said jaws close onto said tool and said first race and said second race rotate relative to each other, said one of said second race and said bearing elements engages successive said recesses.