C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/46
C21D 9/22 (2006.01) C21D 1/70 (2006.01) C21D 1/74 (2006.01) C23C 8/66 (2006.01)
Patent
CA 1263933
ABSTRACT Shown is a method of manufacturing an earth boring bit of the type having a bearing pin which extends from a head section of the drill bit for rotatably mounting a cutter. A container is provided having opposing end openings with sidewalls therebetween which define a con- tainer interior. The container is placed over a portion of the head section so that the pin extends within the interior of the container. A spring spacer is then installed within the interior of the container about at least a portion of the circumference of the bearing pin at at least one axial location. The container is then packed with a particulate treating medium, the container is covered, and the pin and container are placed into a furnace for a time and at a temperature sufficient to activate the treating medium.
514557
Poland John R.
Scott Danny E.
Simons Robert W.
Gowling Lafleur Henderson Llp
Hughes Tool Company
Poland John R.
Scott Danny E.
Simons Robert W.
LandOfFree
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