Rotary rock bit with improved thrust flange

Details Rotary rock bit with improved thrust flange Rotary rock bit with improved thrust flange

1980-10-09

1982-05-18

Stearns, Richard R.

Cutlery

175227, 175371, F16C 3310, E21B 908

Patent

active

043301584

ABSTRACT:
A rolling cone cutter earth boring bit is provided having a pair of facing thrust bearing surfaces, one such surface on the rolling cone and the other surface on the journal pin. The latter surface defines an annular groove which has separate arcuate segments thereof filled with a hardfacing material and machined to provide a complimentary engaging surface with the cone thrust bearing surface. The spaces in the groove between the hardfacing segments define pockets providing lubricant reservoirs and debris traps for the immediately adjacent thrust bearing surfaces.

REFERENCES:
patent: 3721307 (1973-03-01), Mayo
patent: 3866987 (1975-02-01), Garner
patent: 3995917 (1976-12-01), Quinlan
patent: 4061376 (1977-12-01), Villaloboz
patent: 4252383 (1981-02-01), Simpson
patent: 4272134 (1981-06-01), Levefelt

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