US PATENT SUBCLASS 175 / 412
.~ Plural separable cutter elements

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

327  DF  BIT OR BIT ELEMENT {21}
412.~ Plural separable cutter elements {1}
413  DF  .~.~> Independently attachable

DEFINITION

Classification: 175/412

(under subclass 327) Apparatus in which the bit is provided with two or more cutter elements, said elements being detachably secured to the bit head.

SEE OR SEARCH THIS CLASS, SUBCLASS:

331+, for plural separable rolling cutter elements.

382+, for detachably mounted cutter elements which are adjustable.

SEE OR SEARCH CLASS

408, Cutting by Use of Rotating Axially Moving Tool,

199+,.