Tube Fitting Assembly

摘要

A tube fitting for sealing an end of a tube uses a notch formed in the exterior surface of the tube as a sealing seat. An internally threaded body is configured to receive an externally threaded end of a nut, while the body and the nut are mounted in a surrounding relationship to the tube end. A ferrule mounted between the nut and the tube is forced to plastically deform and move into the notch to thereby seal the tube end.

主权项

1. A tube fitting assembly comprising:
a cylindrical tube having a longitudinal wall, an exterior surface, a longitudinal axis and a tube end; a circumferential notch formed in the exterior surface of the longitudinal wall at a distance from the tube end; a first tube fitting member having an inner bore and an internally threaded end, said first tube fitting member being configured to receive the tube within the inner bore; a second tube fitting member having a central aperture extending through a length thereof, said second fitting member comprising an externally threaded end; and a tube gripping member mounted for sliding movement along exterior surface of the tube and having a front end configured to fit into the notch while plastically deforming, when the second tube fitting member is pulled up, and seal the tube end.