US PATENT SUBCLASS 175 / 426
.~.~ Insert

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
425  DF  .~ Specific or diverse material {3}
426.~.~ Insert {2}
427  DF  .~.~.~> For a mine roof drill bit type
428  DF  .~.~.~> Preformed cutting element (e.g., compact) mounted on a distinct support (e.g., blank, stud, shank) {5}

DEFINITION

Classification: 175/426

Insert:

(under subclass 425) Apparatus in which the cutting edge of the bit is a relatively small element of abrasion resistant material which is at least partially enclosed within a slot or aperture in the bit and secured therein.