Coupling and method for folding back a pipe and using for it and

Details Coupling and method for folding back a pipe and using for it and Coupling and method for folding back a pipe and using for it and

1993-08-10

1995-08-08

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

285386, F16L 2500, F16L 3500

Patent

active

054392594

ABSTRACT:
The invention related to this application is: a method for folding back an opening end of resin pipe comprising following processes, (a) a process for mounting an annular body to a circumference of a pipe, (b) a process for inserting a conically protruded portion of a guiding portion including the conically protruded portion and a curved surface groove formed around this circumference to an opening end of the pipe and simultaneously advancing with rotating the guiding portion, and (c) a process for continuing the advancement with rotating the guiding portion whereby folding back the opening end of the pipe, and inserting the folded back pipe opening end to the circumference of the annular body; and an apparatus for folding back an opening end of resin pipe comprising a clamping element for holding the pipe and a bending element and the clamping element including a tightening mechanism for pushing the pipe to radial direction, and the bending element including a guiding portion for advancing by rotating with abutting to the pipe opening end, a rotational driving mechanism for rotating the guiding portion, and a reciprocating mechanism for advancing/retreating the guiding portion toward the pipe axis direction, so as to make the pipe opening end to be outwardly expanded and simultaneously folded back to axial direction.

REFERENCES:
patent: 1058542 (1913-04-01), Brown
patent: 4072328 (1978-02-01), Elliot
patent: 4127021 (1978-11-01), Johnson
patent: 4133565 (1979-01-01), Shutt
patent: 4538842 (1985-09-01), Kowal et al.

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