Patent ID: 6397712
Filing Date: 2002-06-04
Classification: B23B,Y10T

Abstract:
A lathe chuck comprising:a chuck body rotatable about a body axis and formed with a plurality of angularly spaced, axially forwardly open, and radially extending jaw guides and with respective secantally extending rack guides crossing the jaw guides; respective jaws radially displaceable in the jaw guides between radial inner and outer end positions and having axially backwardly directed jaw teeth; respective racks secantally displaceable in the rack guides; respective bolts in the racks each having axially forwardly directed teeth meshable with the respective jaw teeth and each displaceable axially between a forward meshing position with the respective jaw and bolt teeth meshed and a rear out-of-mesh position with the respective jaw and bolt teeth out of mesh; a slide assembly angularly displaceable in the body and having respective cam surfaces engageable with the bolts, the slide assembly being displaceable angularly between a holding position retaining the bolts in the respective meshing position and a freeing position allowing the bolts to move into the respective out-of-mesh positions; respective pins axially displaceable on the bolts and having outer ends engageable with the respective jaws in both the meshing and out-of-mesh positions of the respective bolts; and respective springs urging the pins axially outward toward the respective jaws.