Wound wire bearing

Details Wound wire bearing Wound wire bearing

1984-10-19

1986-02-11

Levy, Stuart S.

Bearings

Rotary bearing

Roller drill bit

384 93, 384291, 384371, E21B 1022, E21B 1024, F16C 3310

Patent

active

045696012

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a thrust bearing member is positioned between the rolling cutter or cone and the bearing pin of a rock bit and comprises wound wire such as a closed spiral coil spring that provides spaced-apart bearing surfaces with open areas therebetween. The flexibility of the spiral spring tends to spread the load between several bearing areas to thereby reduce concentrations of stress and the occurrence of localized high temperatures and wear, and the spacing of the bearing surfaces provides wear and contamination particle traps as well as lubricant reservoirs, to significantly increase the useful life of the bearing.

REFERENCES:
patent: 3167366 (1965-01-01), Freund
patent: 3346302 (1967-10-01), Robinson et al.
patent: 4109974 (1978-08-01), Svanstrom et al.
patent: 4181185 (1980-01-01), Keller et al.
patent: 4333691 (1982-06-01), Cooper
patent: 4427308 (1984-01-01), Sandberg
patent: 4446933 (1984-05-01), Bodine

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