Method of welding and a system therefor

Details Method of welding and a system therefor Method of welding and a system therefor

1992-07-28

1993-08-10

Heinrich, Samuel M.

Metal fusion bonding

With control means responsive to sensed condition

228 42, 137 13, 137 88, 219 74, B23K 3538

Patent

active

052341488

ABSTRACT:
A method of welding in which an inert gaseous shield at a welding zone is provided by a mixture of gases of different densities. The proportions of the individual gases in the mixture are controlled to ensure that the density of the gas mixture is about the same as the density of the surrounding atmospheric air. Cryogenic means may be used to form a condensed gas plug in a pipe or the like to be welded.

REFERENCES:
patent: 3636754 (1972-01-01), Lynworth et al.
patent: 4080964 (1978-03-01), Savoie, Jr.
patent: 4150561 (1979-04-01), Zupanick
patent: 4655075 (1987-04-01), Albert et al.
patent: 4664124 (1987-05-01), Ingle et al.
British Search Report.

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