Metal fusion bonding – Process – Metal to nonmetal with separate metallic filler
Patent
1997-04-14
2000-04-04
DePumpo, Daniel G.
Metal fusion bonding
Process
Metal to nonmetal with separate metallic filler
277404, 156 60, 228177, 427528, 427596, B23K 3102, F16J 1534
Patent
active
060450290
ABSTRACT:
An earth-boring bit has a bit body, at least one cantilevered bearing shaft, including a base and a cylindrical journal bearing surface extending inwardly and downwardly from the bit body, and at least one cutter mounted for rotation on the cylindrical journal bearing surface of the bearing shaft. A seal assembly is disposed between the cylindrical journal bearing surface and the cutter proximally to the base of the cantilevered bearing shaft. The seal assembly includes at least one rigid seal ring having a seal face in contact with a second seal face. At least one of the seal faces is at least partially formed of a super-hard material having wear-resistance greater than, and a coefficient of sliding friction less than, that of the rigid seal ring material.
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Baker Hughes Incorporated
Bradley James E.
DePumpo Daniel G.
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