US PATENT SUBCLASS 408 / 93
.~.~ Connected to tool through opening being enlarged by tool

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

72 R  DF  WITH WORK-ENGAGING STRUCTURE OTHER THAN TOOL OR TOOL-SUPPORT {13}
87  DF  .~ Having tool-opposing, work-engaging surface {8}
93.~.~ Connected to tool through opening being enlarged by tool {1}
94  DF  .~.~.~> Plural, coaxially opposing, work-engaging means

DEFINITION

Classification: 408/93

(under subclass 87) Device for modifying the bore of a previously existing passageway through the work wherein the work-contacting structure is secured to other parts of the device by means extending into and beyond the passageway.

SEE OR SEARCH THIS CLASS, SUBCLASS:

80+, for similar structures wherein the securing structure or the work-contacting structure is specifically adapted to frictionally engage the side wall of the passageway.