Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1991-07-25
1992-11-24
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 3, 277 59, 277 65, 277 71, 277 74, 277 79, 277134, 277135, F16J 1532, F16J 1540, F16J 1544
Patent
active
051656990
ABSTRACT:
A liquid full pressurized vessel seal is provided to effectively seal around rotating shafts in the walls of vessels that stir, for example, highly viscous materials such as polymers. The seal has a housing with a conventional mechanical seal and a bushing on the outward side thereof, after which is injected a sealing liquid under pressure such as mineral oil. The pressure of the sealing liquid is sufficient to just force open a plurality of lip seals facing the direction of the vessel. The mineral oil, or other fluid compatible with the contents of the vessel, meets the product in a wind back pump section of the seal having a thread that forces the product back into the vessel and thus prevents its leakage.
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Carnes Jerry L.
Shrontz Charles D.
Arco Chemical Technology L.P.
Cuchlinski Jr. William A.
Cummings Scott W.
Harper Stephen D.
Mossman David L.
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