Pipe couplings for misaligned or out-of-round pipes and expandin

Details Pipe couplings for misaligned or out-of-round pipes and expandin Pipe couplings for misaligned or out-of-round pipes and expandin

1997-04-14

1998-06-23

Arola, Dave W.

Pipe joints or couplings

Packed

Sleeve

285373, 285906, 285416, 29434, F16L 1704

Patent

active

057694672

ABSTRACT:
A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipe coupling comprising an annular coupling member having end members and spaced annular protrusions forming gasket channels between the annular protrusions and respective end members for receiving the annular gasket members and a central channel between the gasket channels for accommodating some offset, deflection, or out-of-roundness in the pipes. In one embodiment, the coupling further comprises an outer set of annular protrusions for forming expansion channels outside of the gasket channels. The expansion channels allow retaining rings fixed to the pipe ends to reciprocate within the expansion channels during expansion or contraction of the pipe ends. The protrusions also restrain the degree of expansion or contraction of the pipes and protect the gasket. In another embodiment, an interior pipe coupling with a spreader bolt assembly is provided.

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