US PATENT SUBCLASS 384 / 95
.~.~ Inserts or bearing surface detail

Current as of: June, 1999
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384 /   HD   BEARINGS

91  DF  ROTARY BEARING {8}
92  DF  .~ Roller drill bit {4}
95.~.~ Inserts or bearing surface detail

DEFINITION

Classification: 384/95

Inserts or bearing surface detail:

(under subclass 92) Subject matter in which a bearing surface is modified (a) to receive a different material in a portion of the surface, (b) to receive thin strips (c) by special treatment to improve its antifriction, or wear resisting properties, or (d) by specified material therefor.