Positive seal steel coupling apparatus and method therefor

Details Positive seal steel coupling apparatus and method therefor Positive seal steel coupling apparatus and method therefor

1979-06-15

1982-05-11

Arola, Dave W.

Pipe joints or couplings

Deformed

Outwardly expanded

285383, 285369, 285DIG16, 29525, F16L 1900

Patent

active

043289835

ABSTRACT:
Method and apparatus by which joints of seamless pipe are rapidly and economically fabricated into a fluid conveying pipeline. Steel tubular fluid conducting members in the form of pipe joints are joined together by a steel coupler sleeve. The sleeve has opposed cavities which receive adjacent marginal ends of the members. Each marginal end of the pipe is forced into one cavity of the sleeve with great force such that the sleeve cavity holds the pipe ends together with a strong friction fit. A sealing substance is applied to the marginal ends of the pipe. A special hydraulic machine engages and forces the marginal ends of the pipe into the sleeve cavities with a twisting motion, which enhances the connection effected between the sleeve and the marginal end of the pipe.

REFERENCES:
patent: 2147343 (1939-02-01), Hokanson
patent: 2802044 (1957-08-01), Corne
patent: 3133344 (1964-05-01), Keasler
patent: 3451119 (1969-06-01), Coberly et al.
patent: 4095825 (1978-06-01), Butler
patent: 4124232 (1978-11-01), Ahlstone
patent: 4156793 (1979-05-01), Carlson

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