Chemistry: physical processes
Patent
1978-08-25
1981-01-06
Krizmanich, George H.
Chemistry: physical processes
233 1A, B04B 114
Patent
active
042431727
ABSTRACT:
A centrifugal separator including a bowl rotatable about an axis having a bottom and a cover separated by an intermediate flange portion having an annular row of discharge openings, a hollow piston-like member in the bowl axially moveable between a position in which it is sealed against the cover and a position in which it is retracted from the cover and communicates with said discharge openings, a liquid control system for moving the piston-like member between said axial positions while the bowl is rotating, and an hydraulic seal system including an annular gutter-shaped member around the inside of said intermediate flange portion and containing a dense sealing liquid such as mercury and an annular sealing member extending from the periphery of the piston-like member into the gutter-shaped member and sealed therewith by the sealing liquid, the sealing liquid and the control liquid interfacing near the gutter-shaped member and effecting a balance therebetween due to gravitational and centrifugal forces acting thereon.
REFERENCES:
patent: 2927829 (1960-03-01), Porter
patent: 3765599 (1973-10-01), Hemfort
patent: 4054244 (1977-10-01), Paschedag
Krizmanich George H.
Robatel S.L.P.I.
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