Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-07-27
1982-12-28
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 1, 277 9, 277 27, 277207A, 277226, 277152, 285 3, 285 94, F16J 1532, F16J 1540, F16J 1554
Patent
active
043658180
ABSTRACT:
A pressure responsive pipe joint seal for sealing connecting pipe joint members includes sealing flanges which 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.
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