Patent ID: 6902172
Filing Date: 2005-06-07
Classification: B23B,Y10S,Y10T

Abstract:
1. A drill chuck comprising: a chuck body centered on and adapted to be rotated about a longitudinal axis and unitarily formed with a plurality of forwardly open angled guides angularly spaced about the axis; respective jaws displaceable along the guides in the chuck body and each formed with a row of teeth; a tightening sleeve rotatably surrounding the body and with a rim; a ring rotatable on the body about the axis, axially fixed to the sleeve, and formed with a screwthread meshing with the teeth of the jaws, whereby rotation of the ring in one direction moves the jaws radially together and opposite rotation moves them radially apart; a first axially elastically deformable spring seated in the chuck body and bearing axially forward on the ring; and a second axially elastically deformable spring seated in the chuck body and bearing axially rearward on the sleeve, the rim bearing on the chuck body on axial rearward displacement of the sleeve relative to the chuck body.