US PATENT SUBCLASS 408 / 81
.~.~.~ Engaging sides of 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}
79  DF  .~ Frictionally engaging sides of opening in work {1}
80  DF  .~.~ Opening coaxial with tool {2}
81.~.~.~ Engaging sides of opening being enlarged by tool {2}
82  DF  .~.~.~.~> Engaging surface axially advanced of tool-action
83  DF  .~.~.~.~> Engaging surface subsequent to tool-action on that surface

DEFINITION

Classification: 408/81

(under subclass 80) Device wherein the cutting tool is

adapted to engage and modify characteristics of the passageway or recession contacted by the additional work-contacting means.

(1) Note. The work-contacting means of this subclass may contact the wall of the passageway or recession at a point remote from the operating tool.