Patent ID: 6889986
Filing Date: 2005-05-10
Classification: B23B,Y10S,Y10T

Abstract:
1. A drill chuck comprising: a chuck body centered on an axis and formed with a plurality of forwardly open angled guide passages spaced about the axis and with a radially open groove having an axially rearwardly directed front face and an axially forwardly directed rear face; respective jaws displaceable generally axially in the passages and each having a row of radially outwardly directed teeth exposed at the groove; a tightening ring engaged in the groove between the faces thereof, having an internal screwthread meshing with the teeth of the jaws, formed with a front face axially confronting the front groove face, and rotatable on the body about the axis, whereby rotation of the ring on the body in a tightening direction moves the jaws axially forward and radially together and opposite rotation moves them axially backward and radially apart; and an angled front spring washer having a front face bearing axially forward on the front face of the groove and a rear face bearing axially rearward on the front face of the ring and axially elastically deformable on axial forward displacement of the tightening ring to permit limited relative axial movement of the ring and body.