Fluid handling – With leakage or drip collecting
Patent
1987-06-26
1989-04-04
Michalsky, Gerald A.
Fluid handling
With leakage or drip collecting
251309, F16K 504
Patent
active
048176621
ABSTRACT:
Shut-off valve comprising a casing which has at least two connections, one shut-off element rotatably supported in the casing having a thru bore which selectively can be aligned with the connections and an outer cylindrical surface, and a cylindrical annular sealing sleeve of elastic material which is blocked against rotation in the casing which has thru bores adapted to be aligned with the connections, the sleeve sealing by cooperating with the cylindrical surface of the shut-off element and being axially held in place at its outer edge surfaces by the casing, whereby in the outside of the sealing sleeve being made of PTFE or like material around the thru bore a groove is formed into which an elastic sealing ring is placed, the diameter of which is larger than the depth of the groove.
REFERENCES:
patent: 3133722 (1964-05-01), McGuire et al.
patent: 3314644 (1967-04-01), Dwyer et al.
patent: 3423067 (1969-01-01), Foster
patent: 3667504 (1972-06-01), Wittren et al.
patent: 4261385 (1981-04-01), Worley
Dover Corporation
Michalsky Gerald A.
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