Mechanically attached end fitting with insert for metal tubing

Details Mechanically attached end fitting with insert for metal tubing Mechanically attached end fitting with insert for metal tubing

1978-12-28

1981-09-15

Arola, Dave W.

Pipe joints or couplings

Deformed

Outwardly expanded

285422, F16L 1314

Patent

active

042893402

ABSTRACT:
An end fitting for metal tubing having a bore provided with spaced annular grooves is also provided with a thin hard metal tubular insert which is disposed within the end of the tubing when the tubing is introduced into the bore and extends from the inner extremity of the metal tube to a point beyond the last annular groove. At least a portion of the insert is expanded radially along with the overlying section of the tubing forcing the latter into said grooves. The insert may have an unexpanded end portion which makes at least a snug fit within the unexpanded tube. The result is substantially increased flex life of the metal tube.

REFERENCES:
patent: 1738915 (1929-12-01), Mueller
patent: 2429076 (1947-10-01), Sery
patent: 2766804 (1956-10-01), Kaiser
patent: 3534988 (1970-10-01), Lindsey
patent: 3575447 (1971-04-01), Merkle
patent: 3711132 (1973-01-01), Nickerson
patent: 3730567 (1973-05-01), Webster
patent: 4076287 (1978-02-01), Bill et al.
patent: 4147385 (1979-04-01), van der Velden

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