Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-11-09
1983-07-19
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277186, 285230, 285231, 285291, 285345, F16J 1510, F16L 2102
Patent
active
043940250
ABSTRACT:
An improved seal system for the bell and spigot joint of a concrete pipe. The seal includes a bell sealing ring and a spigot sealing ring, each constructed of plastic material which when the spigot is received in the bell form a compression seal which will withstand substantial internal pressure without leaking. The ring members include, respectively, outwardly directed and inwardly directed ridges or flanges which are embedded in the respective bell and spigot ends of the concrete pipe. The spigot end ring, however, includes a central concave depression which extends into the concrete and receives an O-ring, and a lower depending flange also embedded in the concrete forming the spigot end. The joint of this invention then forms a reinforced concrete pipe capable of withstanding substantial internal pressure at least up to 50-60 pounds per square inch.
REFERENCES:
patent: 2401554 (1946-06-01), Davids
patent: 2537659 (1951-01-01), Eisner et al.
patent: 3135519 (1964-06-01), Ligon et al.
patent: 3759285 (1973-09-01), Yoakum
patent: 4084828 (1978-04-01), Jones
patent: 4186931 (1980-02-01), Anderson
Anderson Seal Company, Inc.
Ward, Jr. Robert S.
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