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US 4,320,931 AGranted
Insulating bearing and method of manufacture
AssigneeSiemens-Allis, Inc.
InventorDon L. Shaffer
Life of this patent
Estimating the term…
Abstract
Bearing adaptable for use in dynamoelectric machine for preventing current from flowing through the bearing itself. A three-part layer including a base material, a ceramic layer, and an adhesion layer is applied sequentially upon the bearing shell. The last layer is then covered with a bearing material, ordinarily babbitt so that the babbitt, is electrically isolated from the bearing shell.
Claims9
A plain bearing for a dynamoelectric machine, said bearing being adapted to be received in a stationary member and to receive a rotating member and provide electrical isolation there-between, comprising:
- a bearing shell having an outer surface and a inner surface within which the rotating member is to be disposed;
- an inner layer of bearing material formed in said bearing shell for slidingly supporting the surface of the rotating member;
- and
- insulating means disposed between said bearing shell and said bearing material and physically bonding said shell and said bearing material together, including;
- (i) a base layer in intimate contact with said bearing shell,
- (ii) a ceramic layer overlying said base layer, and
- (iii) a metallic adhesion layer between said ceramic layer and said layer of bearing material;
- whereby said layers permanently bond said inner layer of bearing material to said bearing shell to form a monolithic structure whose inner, bearing surface is electrically isolated from its outer, shell surface.
5 more elements
Dependencies are inferred from the claim text.