Unitary brazed tubing fitting assembly with deformed sealing web

Details Unitary brazed tubing fitting assembly with deformed sealing web Unitary brazed tubing fitting assembly with deformed sealing web

1993-03-23

1994-08-02

Nicholson, Eric K.

Pipe joints or couplings

Molded joint

Interlocked

285287, 285331, 285382, 2281734, 228136, 29509, F16L 1308

Patent

active

053339185

ABSTRACT:
A threaded fitting, having an external thread and sealing surfaces to match standard tubing fitting designs. The fitting has an internal bore which is defined by two coaxially aligned cavities; an upper cavity is the diameter to receive a standard diameter tubing end, and has a bottom end defined by a metal web which extends into the bore of the fitting a distance. This web forms a stop upon which a tubing end can be bottomed. A counter groove is cut into the fitting adjacent to the upper cavity for receiving the tubing end. In use, a brazing metal ring is inserted into the upper counter groove, and a tubing end is inserted into the first cavity, and bottomed against the web. The fitting and tubing end are then clamped or held and a tapered mandrel, of a diameter equal to the inner diameter of the tubing, is inserted upward into the second cavity; this mandrel deforms the web upward into the interior of the tubing end, forming a positive mechanical seal and lock between the tubing and fitting.

REFERENCES:
patent: 1703037 (1929-02-01), Heck
patent: 1908020 (1933-05-01), Hulsart
patent: 2033122 (1936-03-01), Cornell, Jr.
patent: 2166078 (1939-07-01), Stephenson
patent: 2460667 (1949-02-01), Wurzburger
patent: 2488229 (1949-11-01), Noojin
patent: 3198560 (1965-08-01), Collins
patent: 3534986 (1970-10-01), Hartmann et al.
patent: 4161273 (1979-07-01), Jeffers
patent: 4233726 (1980-11-01), Williams
patent: 4887853 (1989-12-01), Flowers et al.

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