Wound wire bearing

Details Wound wire bearing Wound wire bearing

1982-09-01

1985-04-30

Levy, Stuart S.

Bearings

Rotary bearing

Roller drill bit

384 93, 384292, E21B 1022, E21B 1024, E16C 3310

Patent

active

045140987

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a bearing positioned between the rolling cutter or cone and the bearing pin of a rock bit comprises wound wire such as a closed helical coil spring that provides spaced-apart bearing surfaces with open areas therebetween. The flexibility of the helical 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: 1200060 (1916-10-01), Wemp
patent: 1398220 (1921-11-01), Acheson, Jr.
patent: 1454682 (1923-05-01), Layne
patent: 1600961 (1926-09-01), Payne
patent: 2664321 (1953-12-01), Noble
patent: 2667389 (1954-01-01), Smith
patent: 3178239 (1965-04-01), Zeller
patent: 3235316 (1966-02-01), Whanger
patent: 4189985 (1980-02-01), Harris
patent: 4257654 (1981-03-01), Keepers

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