US PATENT SUBCLASS 173 / 32
.~ Anchored to work

Current as of: June, 1999
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173 /   HD   TOOL DRIVING OR IMPACTING

31  DF  WITH WORK ENGAGING MEANS SUPPORTING DRIVE {4}
32.~ Anchored to work {1}
33  DF  .~.~> Balanced with respect to axis of tool advance

DEFINITION

Classification: 173/32

(under subclass 31) Apparatus in which the work engaging means comprises a structure adapted to positively engage the material being worked at a point in the face being worked (e.g., the face perpendicular to the axis of tool advance), in such a manner as to resist reactionary movement of the means causing forward movement of the tool into the work.