Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-07-27
1996-12-03
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 34, 277 343, F16J 1510
Patent
active
055800688
ABSTRACT:
A liquid-filled seal for sewer pipes. The seal comprises a hollow trapezoidal cavity formed by spaced circumferentially extending walls and radially extending walls of elastomer or other material formed of substantially uniform thickness. Additional materials extending radially from the circumferentially extending walls form inner and outer annular sealing ribs that contact portions of adjacent pipes thereby to effect a seal between those sections. A non-compressible liquid fills the cavity thereby to promote uniform sealing pressure around the periphery of the pipes notwithstanding the relative position of the adjacent pipe sections.
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DePumpo Daniel G.
NPC, Inc.
Shoap Allan N.
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