Tube coupling

Details Tube coupling Tube coupling

1987-06-02

1989-07-04

Callaghan, Thomas F.

Pipe joints or couplings

Deformed

Outwardly expanded

285110, 285342, 285422, F16L 1314

Patent

active

048445177

ABSTRACT:
A coupling for swaged attachment to thin wall tubing. The coupling is a cylindrical body with a longitudinal axis and an inner peripheral wall. At least one groove is located in the inner peripheral wall. In one embodiment, the groove is substantially rectangular in cross section. The rectangular groove has a base and two side walls. The side walls meet the base to form corners. The corners have a radius of curvature of at least the depth of the groove. Alternatively, the cross section of the groove can be ramped in shape. The ramped shape groove has a base and two side walls. One of the two side walls meets the base at about 90.degree., and the second side wall meets the base at an angle substantially greater than 90.degree.. In a third embodiment of the invention, the groove is ramped with one side wall meeting the inner peripheral wall of the coupling sleeve at about 90.degree., and a second side wall meeting the inner peripheral sleeve of the inner peripheral wall of the coupling sleeve at substantially less than 90.degree.. The preferred material for the coupling sleeve for aerospace use is titanium.

REFERENCES:
patent: 2709092 (1955-05-01), Wallace
patent: 3484123 (1969-12-01), van der Velden
patent: 3711132 (1973-01-01), Nickerson
patent: 3730567 (1973-05-01), Webster
patent: 3817562 (1974-06-01), Cook et al.
patent: 3827727 (1974-08-01), Moebius
patent: 3893720 (1975-07-01), Moebius
patent: 4026006 (1977-05-01), Moebius
patent: 4061367 (1977-12-01), Moebius
patent: 4147385 (1979-04-01), van der Velden
patent: 4189817 (1980-02-01), Moebius
patent: 4289340 (1981-09-01), Press et al.
patent: 4688318 (1987-08-01), Foucault et al.
Pamphlet entitled "Resistoflex Corporation DY-12," Installation Instructions, for Dynatube Fitting (Unkown Date).

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