Coupling for shoulder ended pipes

Details Coupling for shoulder ended pipes Coupling for shoulder ended pipes

1993-03-30

1995-02-21

Jones, David

Metal deforming

Process

With attenuation, thickening, elongating or shortening of...

72327, 72334, 72375, 72415, B21D 506

Patent

active

053905237

ABSTRACT:
A method of producing a coupling for pipes includes the steps of subjecting a predetermined length of desired cross-sectional profiled material to a bending process in a mould having a semi-circular portion to form an item of semi-circular shape; forming bent ends of predetermined size on the profiled material; and then coining the bent ends to lie in an identical horizontal plane as a horizontal diameter of the item of semi-circular shape. The coining step is accompanied by a substep of forcing excess material from the predetermined length of profiled material into a zone between the semi-circular portion of the mould and the bent ends of predetermined size on the profiled material.

REFERENCES:
patent: 10857 (1887-08-01), Taplin
patent: 1803542 (1931-05-01), Boyle, Jr.
patent: 2748455 (1956-06-01), Draper et al.
patent: 4741194 (1988-05-01), Kozyra et al.

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