US PATENT SUBCLASS 175 / 414
.~ Impact or percussion type

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

327  DF  BIT OR BIT ELEMENT {21}
414.~ Impact or percussion type {5}
415  DF  .~.~> Combined with rotary
416  DF  .~.~> Noncircular bore cutter
417  DF  .~.~> With internal-fluid passage {2}
420  DF  .~.~> Cruciform
420.1  DF  .~.~> Insert {1}

DEFINITION

Classification: 175/414

(under subclass 327) Apparatus in which the cutting edge of the bit is of the type which is adapted to disintegrate the formation by a forceful contact or a repetitive striking action.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19+, for drive points which are driven into the earth usually by impact.

389+, for impact bits having a leading portion forming a smaller diameter initial bore.

395, for an impact type bit provided with a helical cuttings conveying portion.

398+, for a nonsymmetrical impact type bit.

405, for a core forming impact type bit. 407, for an impact type bit provided with a noncutting portion forwardly of the cutting portion.

SEE OR SEARCH CLASS

125, Stone Working,

40+, for impact type tools for working on stone after it has been removed from its position in the earth.

299, Mining or In Situ Disintegration of Hard Material,

100, for a percussive cutter head for mining or disintegrating hard material.