US PATENT SUBCLASS 83 / 824
.~.~ With anti-friction means

Current as of: June, 1999
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83 /   HD   CUTTING

523  DF  MEANS TO DRIVE OR TO GUIDE TOOL {35}
821  DF  .~ Guide {4}
824.~.~ With anti-friction means {2}
825  DF  .~.~.~> Roller with peripheral flange or groove
826  DF  .~.~.~> Disc

DEFINITION

Classification: 83/824

(under subclass 821) Device in which the tool-constraining means includes at least one rotatable element (e.g., ball, roller, disc, etc.) which contacts the tool or tool support to reduce the resistance to motion of the tool, or in which at least a portion of the surface of the tool-constraining means is made of a material having friction-reducing characteristic (e.g., Teflon).