Coupling device useful for joining or capping plastic pipe

Details Coupling device useful for joining or capping plastic pipe Coupling device useful for joining or capping plastic pipe

1993-06-18

1995-02-14

Arola, Dave W.

Pipe joints or couplings

Nonmetal to metal

Internal member

285331, 285350, 285906, 285 94, 285371, F16L 33207

Patent

active

053888731

ABSTRACT:
A coupling device for joining ends of pipes together or capping an end of a single pipe. The device includes a metal insert having serrations for engaging an inner surface of a plastic pipe, a deformable coupling member which overlies the pipe and a metal ring of smaller inner diameter than the outer diameter of the coupling member for compressing the coupling member and plastic pipe against the metal insert. A space forming feature reduces the insertion force required to slide the metal ring over the coupling member. For instance, the metal insert can include a circumferentially extending groove on an outer surface to accommodate flow of the plastic pipe as it is deformed by the metal ring. Alternatively, the coupling member can include a recess, groove or projection, the inner surface of the coupling member can be tapered, the end of the plastic pipe can be tapered or a compressible member or a ball bearing can be inserted between the end of the pipe and the coupling member to accomplish the same result.

REFERENCES:
patent: 646590 (1900-04-01), Williams
patent: 1184484 (1916-05-01), Muller
patent: 2424863 (1947-07-01), Swain
patent: 3004780 (1961-10-01), Main
patent: 3877735 (1975-04-01), Demier, Sr.
patent: 3908261 (1975-09-01), Demler, Sr.
patent: 4923221 (1990-05-01), Taylor
patent: 5131687 (1992-07-01), Marchow

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