Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1982-08-30
1983-07-05
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 961, 277 962, 277 93SD, 277237R, 277DIG6, 277901, F16J 1516, F16J 1534
Patent
active
043914500
ABSTRACT:
A shaft rotatably mounted within a housing. The shaft extends through a pair of annular seal elements one of which is mounted on the shaft for rotation therewith. The other seal element is associated with the housing and is stationary relative to the shaft. The seal elements have respective mating surfaces which rub together during rotation of the shaft. One seal element is composed of relatively hard material, and the other seal element is composed of relatively soft material so that the mating surface of the latter is conformed to the mating surface of the former when the two mating surfaces are initially rubbed together. There is a minute gap between the mating surfaces, and this gap contains a film of liquid which acts as a lubricant. Both seal elements are composed of a material which will not support an electrochemical reaction, e.g., an electrically insulating material, to prevent electrokinetic corrosion of the mating surfaces when the film therebetween is an electrolytic liquid.
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Electrochemical Technology Corp.
Ward, Jr. Robert S.
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