Patent ID: 7832965

Claim:
A drill comprising: a housing formed with an outlet hole; means for expelling an air stream from the outlet hole; a drive spindle projecting from the housing adjacent the outlet hole and centered on and rotatable about an axis; a chuck body carried on the housing; a tightening sleeve rotatable about the axis on the chuck body; a plurality of radially shiftable jaws inside the sleeve; interengaging screw formations operatively engaged between the body and the sleeve, whereby relative rotation about the axis of the body and the sleeve shifts the jaws radially in the guides; a shield sleeve rotationally fixed to the housing, surrounding the tightening sleeve, and having a rear end juxtaposed with the housing radially outside the outlet hole such that the air stream enters the shield sleeve; and structure forming inside the shield sleeve forward of its rear end a passage and a particle-expelling hole relatively oriented so as to collect drilling particles and blow them out the particle-expelling hole.