Coupling for shoulder ended pipes

Details Coupling for shoulder ended pipes Coupling for shoulder ended pipes

B - Operations, Transporting

21

K

B21K 21/00 (2006.01) B21K 1/16 (2006.01) F16L 21/06 (2006.01)

Patent

CA 2092846

The invention provides a method of producing a coupling for pipes. A predetermined length of a desired cross-sectional profile is bent to form an item of semi-circular side view, forming or pre-forming bent over ends of predetermined size. These ends are coined to lie in the same horizontal plane as a horizontal diameter of the item. The coining step is accompanied by forcing excess material into the zone between the semi- circular portion and the bent over ends.

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