Film riding shaft seal

Details Film riding shaft seal Film riding shaft seal

2007-10-30

2007-10-30

Miller, William L. (Department: 3677)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S348000, C277S943000

Reexamination Certificate

active

11074409

ABSTRACT:
The invention is a film-riding seal for a pump shaft that is resistant to the deposition of iron oxides such as hematite and goethite on the confronting, spaced apart, seal surfaces. The seal generally comprises a ceramic runner mounted on the pump shaft and an adjacent ceramic stationary sealing ring. The runner has a sealing surface and the stationary sealing ring has sealing surface confronting the runner sealing surface. The ceramic sealing surfaces include a catalyst selected from the group consisting of rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold and mixtures thereof.

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