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US 4,643,051 AGranted
Pack carburizing process for earth boring drill bits
AssigneeHughes Tool Company - USA
InventorsRobert W. Simons, Danny E. Scott, John R. Poland
Life of this patent
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AssigneeHughes Tool Company - USA
InventorsRobert W. Simons, Danny E. Scott, John R. Poland
Estimating the term…
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 container 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.
A method of manufacturing an earth boring drill bit of the type having a bearing pin extending from a head section of the drill bit for rotatably mounting a cutter, comprising the steps of:
A method of manufacturing an earth boring drill bit of the type having a bearing pin extending from a head section of the drill bit for rotatably mounting a cutter, comprising the steps of:
A method of manufacturing an earth boring drill bit of the type having a bearing pin extending from a head section of the drill bit for rotatably mounting a cutter, comprising the steps of:
Dependencies are inferred from the claim text.