Patent ID: 6832764
Filing Date: 2004-12-21
Classification: B23B,Y10S,Y10T

Abstract:
A power driver comprising:a. a housing; b. a rotatable drive shaft extending therefrom; and c. a chuck, said chuck comprising, a generally cylindrical body having a nose section and a tail section configured to rotate with said drive shaft, said nose section having an axial bore formed therein and a plurality of angularly disposed passageways formed therethrough and intersecting said axial bore; a plurality of jaws slidably positioned in each of said angularly disposed passageways, each of said jaws having a jaw face formed on one side thereof and threads formed on the opposite side thereof; a nut rotatably mounted on said body in engagement with said threads on said jaws so that rotation of said nut moves said jaws axially within said passageways; a first generally cylindrical sleeve disposed about said nose section of said cylindrical body, said first sleeve being rotationally fixed to said nut and axially fixed with respect to said body; a second generally cylindrical sleeve disposed about said body and over a portion of said first sleeve, which in a first state is rotatable with respect to said housing and rotationally fixed to said body and in a second state is rotationally fixed to said housing and said first sleeve; a nut retaining member having a cylindrical inner diameter and flared inner diameter, said nut retaining member having a nut contact portion for retaining said nut in its operative position; and a nosepiece having a first sleeve contact portion fixed on said nose section of said body for axially retaining said first sleeve in said operative position.