Metal working – Method of mechanical manufacture – Gas and water specific plumbing component making
Patent
1990-01-30
1992-07-21
Cuda, Irene
Metal working
Method of mechanical manufacture
Gas and water specific plumbing component making
29465, 29512, 29523, 2853345, B23P 1904
Patent
active
051311453
ABSTRACT:
In a tube fitting a nut which extends about the end of a tube allows the tube to be threadedly joined to a nipple. The end of the tube is formed in the shape of a collar which retains the nut. The face of the collar is flattened to sealingly meet with an o-ring which resides in an annular recess in the frontal surface of the nipple. The process of forming the collar in the end of the tube includes placing a nut on the tube, gripping the end of the tube with a die, and deforming the end of the tube with a tool of truncated cone-shape move in an advancing, precessing motion. The die is shaped with interior shoulders having the profile of the collar. A socket which forms the back side of the collar can be placed over the tube after the die grips the tube. After the collar formed the dies is removed.
REFERENCES:
patent: 168970 (1975-10-01), Caswell
patent: 3042965 (1962-07-01), Gray, Jr. et al.
patent: 3590455 (1971-07-01), Harris
patent: 3606659 (1971-09-01), Robbins
patent: 3668754 (1972-06-01), Boast
patent: 4761873 (1988-08-01), Wetzel et al.
patent: 4809418 (1989-03-01), Burli
Cuda Irene
Morgan Christopher H.
Parker Hannifin RAK
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