Pipe joint seal

Details Pipe joint seal Pipe joint seal

1980-01-18

1981-10-27

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277152, 277207A, 277206R, F16J 1532, F16J 1546

Patent

active

042969336

ABSTRACT:
The specification discloses a pressure responsive pipe joint seal for sealing connecting pipe joint members. The sealing flanges on the seal define upwardly, outwardly and downwardly curved upper surfaces so that there is less tendency for them to get caught on a pipe joint member as adjacent members are slid into coupling relationship. The seal includes an inflatable bladder whereby the seal can be inflated after it is in its operative position. In one embodiment disclosed, the seal includes a cavity containing a lubricant, the cavity being covered with a rupturable membrane such that when pipe joint members are joined together, the membrane ruptures releasing the lubricant.

REFERENCES:
patent: 2226304 (1940-12-01), Dillon
patent: 3023995 (1962-03-01), Hopkins
patent: 3222076 (1965-12-01), Hollingsworth
patent: 3491825 (1970-01-01), Peterson
patent: 3787061 (1974-01-01), Yoakum

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