Engine bearing surface treatment
AssigneeFederal-Mogul Corporation
InventorRonald J. Thompson
Life of this patent
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Abstract
A dispersion of hard, wear-resistant particles such as aluminum oxide is embedded within a shaft-engaging surface of a bearing such that the service life of a shaft and bearing assembly is extended. The relatively hard aluminum oxide particles exert a polishing action on the shaft surface to improve the wear resistance and seizure resistance of the bearing and shaft system. A tumbling barrel, vibratory bowl, air jet, brush or similar apparatus can be used to apply and embed tumbling media particles within the shaft-engaging surface. During the application period, aluminum oxide particles are transferred to the bearing member surfaces by the sliding, rubbing contact between the abrasive bodies and the individual bearing members.
Claims7
A finished sleeve bearing comprising a backing layer of steel and a lining layer formed of an anti-friction material which defines a shaft engagement surface, the improvement comprising a polishing agent externally applied through said shaft engagement surface and extending only within a thin surface layer beneath said shaft engagement surface, said polishing agent comprising a dispersion of hard abrasive particles within said thin surface layer and a dispersion of clusters of said hard abrasive particles held together with a binder and dispersed within said thin surface layer.
Dependencies are inferred from the claim text.