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US 5,176,455 AGranted
Gradated hydrostatic bearing
AssigneeRockwell International Corporation
InventorMaynard L. Stangeland
Life of this patent
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Abstract
A bearing assembly includes a bearing characterized by a gradated composition such that the bearing transitions from a metallic substrate such as high strength steel to an inner layer of silver, ceramics, or diamond-like material wherein the thermal coefficient of expansion as between the bearing and a rolling element or shaft is matched.
Claims4
A bearing comprising:
- (a) a metal sub-matrix layer;
- and
- (b) an intermediate metallic matrix layer having a hardness intermediate the metal sub-matrix layer and an inner ceramic matrix layer of very hard friction resistant material, the surface of which contacts a rotating element, said bearing characterized in having a thermal coefficient of expansion matched to that of the rotating element.
Dependencies are inferred from the claim text.