Protective gas supply device for electric arc joining

Details Protective gas supply device for electric arc joining Protective gas supply device for electric arc joining

2007-12-11

2007-12-11

Langel, Wayne (Department: 1754)

Electric heating

Metal heating

Nonatmospheric environment at hot spot

C252S372000

Reexamination Certificate

active

11116390

ABSTRACT:
A protective gas supply device for on-site supply of workplaces is provided, in which a liquid argon reservoir, a liquid oxygen reservoir or a liquid carbon dioxide reservoir, and a helium supply are connected to first and second mixers supplying gas to site workplaces. The liquid argon reservoir and the liquid oxygen or carbon dioxide reservoir are connected to the feed side of the first mixer via lines, and the discharge side of the first mixer is connected to at least one workplace and to the feed side of a second mixer. The feed side of the second mixer also receives helium from the helium supply, and the discharge side of the second mixer is connected to at least one additional workplace. The invention permits economical mixing and supply of variable protective gas mixtures to work stations in an on-site environment.

REFERENCES:
patent: 7211765 (2007-05-01), Trube et al.
patent: 2003/0234385 (2003-12-01), Miklos et al.
patent: 2646496 (1990-11-01), None
patent: WO 91/13720 (1991-09-01), None
European Search Report dated Sep. 12, 2005.

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