US PATENT SUBCLASS 175 / 405
.~.~ Impact or percussion type


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
403  DF  .~ Core forming type {3}
405.~.~ Impact or percussion type


DEFINITION

Classification: 175/405

(under subclass 403) 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:

4, for core tubes driven into a formation by an explosion.

414+, for impact type bits, per se.