Prepared joint for a tube fitting

Details Prepared joint for a tube fitting Prepared joint for a tube fitting

1976-11-08

1978-02-28

Arola, Dave W.

Pipe joints or couplings

Deformed

Outwardly expanded

285363, F16L 1304

Patent

active

040762874

ABSTRACT:
An improved prepared joint is provided on a fitting for mechanically joining it to the end of a metal tube. The fitting has a grooved bore and a bore extending end portion for projecting the bore a predetermined distance beyond its grooved portion so that during radial expansion of the tube into the grooved portion the entire expanded length of the tube is fully supported within the fitting. Such support is effective in extending the useful life of the tube assembly formed by the fitting and tube by alleviating metal fatigue failures due to vibrational bending stresses in the expanded portion of the tube.

REFERENCES:
patent: 1178714 (1916-04-01), Griffin
patent: 2942334 (1960-06-01), Blue
patent: 3367683 (1968-02-01), Mattson
patent: 3404903 (1968-10-01), Frantz
patent: 3428338 (1969-02-01), Corwin
patent: 3967840 (1976-07-01), McFall

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