Self-threading joining system for flexible or semirigid pipes

Details Self-threading joining system for flexible or semirigid pipes Self-threading joining system for flexible or semirigid pipes

1996-06-26

1999-01-19

Shackelford, Heather

Pipe joints or couplings

With assembly means or feature

Thread-cutting means

285251, F16L 3500

Patent

active

058606785

ABSTRACT:
A self-threading joining system for flexible or semi-rigid pipes having two basic elements. The first element or joining end has three zones, the first zone being a hollow stem which outside diameter is slightly greater than the bore of the pipe to be joint; the second zone, which is adjacent to the first one, being a portion of outside thread, which is formed by a widening of the outside diameter of the first zone; said first element ending with the third zone or terminal end, which consists in any known element for networks of flows. The second element is a nut to which said first element or joining end is connected, said nut having three zones: a first zone of single inside thread, which is complementary to the portion of outside thread of the joining end; a second zone or intermediate zone, coaxial and adjacent to said first zone of single thread, consisting in an inside ring-shaped groove, and a third zone, which is coaxial and adjacent to said second intermediate zone, consisting in an inside thread of the die type with a bore enough to produce a thread in the pipe to be joint.

REFERENCES:
patent: 190651 (1877-05-01), Webster
patent: 786507 (1905-04-01), Mann
patent: 2768845 (1956-10-01), Samiran
patent: 2782059 (1957-02-01), Stranberg
patent: 3140106 (1964-07-01), Thomas et al.
patent: 5240291 (1993-08-01), Zarnow
patent: 5393104 (1995-02-01), Zarnow

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