04260203 is referenced by 55 patents and cites 4 patents.

A rotary rock bit is disclosed having bearing surfaces utilized therein which have extremely long wear resistant properties. The rock bit comprises a plurality of legs extending downwardly from a main bit body. A cone cutter is rotatively mounted on a journal formed on each leg. One or more of the interengaging bearing surfaces between the cone and the journal includes a layer of diamond material mounted on a substrate of carbide. In one embodiment, the bearing material forms the thrust button adjacent the spindle located at the end of the journal. In another embodiment, the bearing material is located on the interengaging axial faces of the journal and cone. In still another embodiment, the bearing material is a segmented cylindrical bearing located in a circumferential groove formed in the journal.

Title
Bearing structure for a rotary rock bit
Application Number
919263
Publication Number
4260203
Application Date
September 10, 1979
Publication Date
April 7, 1981
Inventor
Lloyd L Garner
Dana Point
CA, US
Agent
Robert G Upton
Assignee
Smith International
CA, US
IPC
F16C 33/12
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