B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 9/14 (2006.01) B21D 19/00 (2006.01) F28F 1/00 (2006.01)
Patent
CA 2192275
The present invention comprises a tubing end fitting and a method of forming thereof wherein the fitting is formed out of the tubing itself. In a first step, the tubing end is compressed in a linear direction and shortened forming a first annular ridge extending around the tubing spaced from the end of the tube by a small tube portion. At the same time, the small tube portion diameter is reduced slightly. The small tube end portion is again compressed slightly in a linear direction initiating the formation of a second annular ridge spaced from the first annular ridge, while at the same time again slightly reducing the diameter of the remaining tubing end portion. In a third step the tubing end is again compressed in a linear direction completing the formation of the second annular ridge. In a fourth step the remaining tube end portion is flared outwardly forming an o-ring receiving groove between the second annular ridge and the tube end.
Goulet Douglas P.
Schurman Adelbert L.
Imi Cornelius Inc.
Ridout & Maybee Llp
LandOfFree
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