Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1978-05-22
1980-06-17
Husar, Francis S.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
308 82, B21D 5310
Patent
active
042076587
ABSTRACT:
The journal and/or pilot bearings of a rotary cone earth boring bit are constructed to include alternating areas of wear resistant materials and anti-galling materials. The bearing matrix is formed by compressing a powdered alloy in the shape of the desired bearing element. The bearing matrix is sintered, thereby forming a porous bearing element. An anti-galling material is infiltrated into the porous matrix of the bearing element and the bearing element is hardened. The resulting bearing element includes areas of water resistant materials and areas of anti-galling materials.
REFERENCES:
patent: 2096252 (1937-10-01), Koehring
patent: 2365562 (1944-12-01), Koehring
patent: 2706693 (1955-04-01), Haller
patent: 2728134 (1955-12-01), Haller
patent: 3235316 (1966-02-01), Whanger
patent: 3492120 (1970-01-01), Haller
patent: 3984158 (1976-10-01), Sorenson et al.
patent: 3992763 (1976-11-01), Haynie et al.
patent: 4012238 (1977-03-01), Scales
patent: 4026657 (1977-05-01), Chmura
patent: 4105263 (1978-08-01), Sorenson et al.
patent: 4121927 (1978-10-01), Lohman et al.
The Effect of the Furnace Atmosphere on the Infiltration of Iron-Powder Compacts, Zagorski et al., International Journal of Powder Metallurgy 7(2) 1971.
Dresser Industries Inc.
Husar Francis S.
Rising V. K.
Rubin Daniel
Scott Eddie E.
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