B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/58
B23K 9/20 (2006.01) B23K 9/32 (2006.01) B23K 35/02 (2006.01) H05B 7/02 (2006.01)
Patent
CA 2029664
A welding accessory which includes an arc shield having outer and inner peripheral surfaces such that a weld can be formed within the inner peripheral surface as the arc shield shields the weld from external air during forming of the weld. The arc shield includes a ceramic material having not less than 40 weight % of boron nitride. The arc shield may be formed of a composite of boron nitride and silicon nitride, a composite of boron nitride and alumina nitride, a composite of boron nitride, aluminum and silicon nitride, or a composite of boron nitride and zirconia.
Yamada Hiroaki
Yoshida Mikihiko
Bereskin & Parr
Okabe Co. Ltd.
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