US PATENT SUBCLASS 451 / 217
.~.~.~.~.~.~ Hob, tap, or fluted thread

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}
216  DF  .~.~.~.~.~ Rocking {1}
217.~.~.~.~.~.~ Hob, tap, or fluted thread

DEFINITION

Classification: 451/217

Hob, tap, or fluted thread:

(under subclass 216) Abrading machine which grinds teeth, grooves, or threads.

SEE OR SEARCH CLASS

409, Gear Cutting, Milling, or Planing,

11, and 12 for apparatus for or method of hobbing.