US PATENT SUBCLASS 451 / 222
.~.~.~.~.~.~ Thread abrader

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}
212  DF  .~.~.~ Reciprocating work holder {4}
213  DF  .~.~.~.~ Rectilinear {6}
218  DF  .~.~.~.~.~ Work rotating {4}
222.~.~.~.~.~.~ Thread abrader {1}
223  DF  .~.~.~.~.~.~.~> Including work support engaging work at opposite, axial ends; e.g., opposed "centers"

DEFINITION

Classification: 451/222

Thread abrader:

(under subclass 218) Abrading machine which grinds a helical groove in a workpiece.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220, for an abrading means for forming a long helix on a workpiece.

SEE OR SEARCH CLASS

409, Gear Cutting, Milling, or Planing,

65+, for thread or helix generating.