US PATENT SUBCLASS 451 / 186
.~.~.~.~ Nut and screw

Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
177  DF  .~ Rotary tool {3}
178  DF  .~.~ Rotary cylinder {11}
182  DF  .~.~.~ One-way work traverse {6}
186.~.~.~.~ Nut and screw {1}
187  DF  .~.~.~.~.~> Blade sharpener

DEFINITION

Classification: 451/186

Nut and screw:

(under subclass 182) Abrading machine in which the workpiece is fed past the tool by the relative rotation of elements having a helical groove cut into their surfaces.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

424.8, for miscellaneous screw and nut gearing.