Dragline with improved thrust bearing assembly supporting upper

Details Dragline with improved thrust bearing assembly supporting upper Dragline with improved thrust bearing assembly supporting upper

1995-09-29

1997-10-14

Stodola, Daniel P.

Bearings

Rotary bearing

Antifriction bearing

384618, 384619, 384622, B62D 5308

Patent

active

056764715

ABSTRACT:
Apparatus comprising a lower support structure having an upper surface, a circular lower rail which is mounted on the upper surface of the lower support structure and which is centered on a generally vertical axis, an upper structure having a lower surface, a circular upper rail which is mounted on the lower surface of the upper structure and which is centered on the axis, a plurality of rollers which are located between the upper and lower rails and which support the upper structure for rotation relative to the lower structure about the axis, the rollers being rotatable about respective generally horizontal axes intersecting the vertical axis at a common point, one of the rails including an inwardly facing surface defining a portion of a sphere centered on the point, and each of the rollers including an outwardly facing surface which engages the inwardly facing surface and which defines a portion of a sphere centered on the point.

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patent: 4723852 (1988-02-01), Ehret
patent: 5154012 (1992-10-01), Kallenberger
patent: 5205657 (1993-04-01), Feld

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