US PATENT SUBCLASS 408 / 233
.~.~.~ Screw driven means

Current as of: June, 1999
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408 /   HD   CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL

199  DF  TOOL OR TOOL WITH SUPPORT {12}
227  DF  .~ Having peripherally spaced cutting edges {3}
231  DF  .~.~ With means to retain tool to support {2}
233.~.~.~ Screw driven means

DEFINITION

Classification: 408/233

(under subclass 231) Device wherein said securing means is separate from the tool and is a helically-ribbed member rotated about the axis of the helix to hold the tool in position by interengagement between the tool and the tool support.