Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1983-07-15
1985-05-07
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 59, 277 65, 277 88, F16J 1536, F16J 1548
Patent
active
045153779
ABSTRACT:
A rotary seal assembly for sealing a rotating shaft, such as the shaft of a centrifugal pump. The assembly has a first sealing element fast on the shaft and a second sealing element arranged non-rotatably but axially movably next to the first element. On that side of the elements towards the pressure fluid which is to be sealed, there is a barrier, and there is an inlet for pressurized service liquid into the annular space between the elements and the barrier. The pressure of the service liquid forces the second element into sealing contact with the first and also provides a liquid barrier separating the elements from the pressure fluid which is being sealed. This feature is useful when abrasive slurries are being pumped, since the slurry is refused access to the elements.
REFERENCES:
patent: 1876520 (1932-09-01), Newkirk et al.
patent: 2010930 (1935-08-01), Rowe
patent: 2276622 (1942-03-01), Leake
patent: 2326824 (1943-08-01), Browne et al.
patent: 2912265 (1959-11-01), Brummer
patent: 3074728 (1963-01-01), Freed
patent: 3333856 (1967-08-01), Voitik
patent: 3567231 (1971-03-01), Albert
patent: 3811688 (1974-05-01), Smith
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