Fume extraction control for welding gun

Details Fume extraction control for welding gun Fume extraction control for welding gun

1975-05-01

1977-04-05

Truhe, J. V.

Electric heating

Metal heating

By arc

219 74, 219136, B23K 900

Patent

active

040163989

ABSTRACT:
A welding gun is provided having vacuum fume extraction means wherein the level of vacuum exerted at the arc welding zone is regulated to avoid extracting shielding gas supplied to the welding zone. The vacuum level is regulated by admitting sufficient air to a fume extracting passage provided within the gun to reduce the vacuum to the desired level.

REFERENCES:
patent: 2176139 (1939-10-01), Lofgren
patent: 2978733 (1961-04-01), Wahlborg
patent: 3048876 (1962-08-01), Kemnitz
patent: 3440681 (1969-04-01), Hixson et al.
patent: 3775587 (1973-11-01), Lindkvist
patent: 3798409 (1974-03-01), Troyer et al.
patent: 3886344 (1975-05-01), Frantzreb, Sr. et al.
patent: 3909586 (1975-09-01), Landis et al.
K. G. Kollman, "Solving the Problem of GMAW Fume Extraction," Welding Journal, pp. 503-508, Aug. 1973.

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