Abrasive grip pipe coupling

Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means

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Details

285328, 285342, 285348, 285356, 285372, 285901, 285302, F16L 2104

Patent

active

048863041

ABSTRACT:
A rigid coupling for plain ended pipe includes radially inwardly movable wedging members of a hard but ductile material, which optionally may be in the form of a collet, and a member providing a camming surface corresponding with an external camming surface on each of the wedging members, the wedging members each having an axially straight inner surface for cooperation with the external axial surface of a pipe, the inner surface of the wedging members being coated with a grit material of a hardness greater than that of the pipe and that of the wedging members, for it to become matrixed within the respective surfaces on the application of compressive forces to the wedging members.

REFERENCES:
patent: 2452275 (1948-10-01), Woodling
patent: 2459956 (1949-01-01), Muller
patent: 2479058 (1949-08-01), Botting
patent: 2531922 (1950-11-01), Seamark
patent: 2617672 (1952-11-01), Nichols
patent: 3077638 (1963-02-01), Hickam
patent: 3149861 (1964-09-01), Larsson
patent: 3252192 (1966-05-01), Smith
patent: 3325195 (1967-06-01), Margis
patent: 3428339 (1969-02-01), Haulik et al.
patent: 4229025 (1980-10-01), Volgstadt et al.

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