US PATENT SUBCLASS 175 / 435
.~.~ Welded, brazed, or soldered


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}
435.~.~ Welded, brazed, or soldered


DEFINITION

Classification: 175/435

Welded, brazed, or soldered:

(under subclass 425) Apparatus in which portions of the bit are connected together by (1) locally heating the parts to a fluid state and allowing the base metals to flow together with or without the addition of other molten metal or (2) connecting the parts by means of a dissimilar fluid metal having a lower melting point.

(1) Note. This subclass includes depositing weld material on a part of the bit as, for example, to form a wear surface or a cutting edge.

SEE OR SEARCH THIS CLASS, SUBCLASS:

375, for a rolling cutter bit having a welded portion.

434, for diamond bits including welding.