Inventor
NORRIS KIRK A
US4 patents
Patents
4 patentsUS6206110B1Mar 27, 2001
Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit
SMITH INTERNATIONAL65 citations94
US6296067B1Oct 2, 2001
Protected lubricant reservoir for sealed bearing earth boring drill bit
SMITH INTERNATIONAL26 citations91
US7237627B2Jul 3, 2007
Bearing and lubrication system for earth boring bit
SMITH INTERNATIONAL10 citations82
US6619412B2Sep 16, 2003
Protected lubricant reservoir for sealed earth boring drill bit
SMITH INTERNATIONAL18 citations82