US PATENT SUBCLASS 175 / 336
.~.~ Rolling cutter bit with fixed cutter

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}
331  DF  .~ Rolling cutter bit or rolling cutter bit element {26}
336.~.~ Rolling cutter bit with fixed cutter

DEFINITION

Classification: 175/336

(under subclass 331) Apparatus in which the bit includes a cutter element or cutting edge other than a rolling cutter element or portion thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

335, for a rolling cutter bit provided with a fixed pilot cutter.