Double chamber sliding backpurge device for gas shielded arc...

B - Operations – Transporting – 23 – K

Patent

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Details

IPC codes

B23K 9/16 (2006.01)

Type

Patent

Patent number

CA 2079836

Description

ABSTRACT OF THE DISCLOSURE A sliding backpurge device for supplying shielding gas to an arc welding process comprises a concave primary gas chamber surrounded by inner and outer seals which define a pressurized secondary gas chamber therebetween. Pressurized secondary gas is supplied to the secondary gas chamber and primary gas is supplied to the primary chamber. Any leaks which do form, minimize impact on the shield gas within the primary chamber despite sliding engagement of the inner and outer seals over the surface to be welded since secondary gas rather than atmospheric gas leaks into the primary chamber.

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