Gas shielding apparatus

Details Gas shielding apparatus Gas shielding apparatus

1984-06-05

1985-12-31

Albritton, C. L.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219136, B23K 916

Patent

active

045623341

ABSTRACT:
An apparatus for preventing oxidation by uniformly distributing inert shielding gas over the weld area of workpieces such as pipes being welded together. The apparatus comprises a chamber and a gas introduction element. The chamber has an annular top wall, an annular bottom wall, an inner side wall and an outer side wall connecting the top and bottom walls. One side wall is a screen and the other has a portion defining an orifice. The gas introduction element has a portion which encloses the orifice and can be one or more pipes. The gas introduction element is in fluid communication with the chamber and introduces inert shielding gas into the chamber. The inert gas leaves the chamber through the screen side wall and is dispersed evenly over the weld area.

REFERENCES:
patent: 2866074 (1958-12-01), Ronay
patent: 2918563 (1959-12-01), Ternisien et al.
patent: 2977457 (1961-03-01), Houldcroft
patent: 3125666 (1964-03-01), Gorman
patent: 3450857 (1969-06-01), Webb
patent: 3469304 (1969-09-01), Medsker
patent: 3875364 (1975-04-01), Boyett
patent: 4495401 (1985-01-01), Sidorov et al.
patent: 4500764 (1985-02-01), Girodi et al.

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