Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1983-09-20
1985-03-05
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 67, 277135, F16J 1540
Patent
active
045026955
ABSTRACT:
A mechanical seal for reversing a flow of leakage between a rotational shaft and an inner wall of a stuffing box in a centrifugal pump is provided. The seal is ensured by a cylindrical flow-reversing impeller secured to the shaft to rotate as the shaft rotates, having flow-reversing means at the front end of the impeller. The flow-reversing means is positioned in a space defined between the shaft and the inner wall of the stuffing box. O-ring means are provided to prevent leakage during periods of non-rotation of the shaft, and securing means provide selective securing of the O-ring means.
REFERENCES:
patent: 3395645 (1968-08-01), Vilet
patent: 3731940 (1973-05-01), Spruiell
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