Plasma powder welding device and its welding method

Electric heating – Metal heating – By arc

Reexamination Certificate

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Details

C219S121470, C219S121590, C219S076160

Reexamination Certificate

active

06987236

ABSTRACT:
A plasma powder welding device in this invention comprises a powder having an identical kind of main component as that of a work piece, a feeder feeding the powder to the work piece, a welding torch generating a plasma between itself and the work piece for focusing the powder fed by the feeder on the work piece and transferring the powder to the work piece, and a power source supplying an electric power to the welding torch, wherein a distance from the welding torch to a focal point to which the powder is focused is set nearly equal to or more than the height of the torch.

REFERENCES:
patent: 3914573 (1975-10-01), Muehlberger
patent: 4866240 (1989-09-01), Webber
patent: 5584433 (1996-12-01), Nakagawa
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patent: 8-300157 (1996-11-01), None
patent: 11-277246 (1999-10-01), None
patent: 01/72462 (2001-10-01), None
Patent Abstracts of Japan, vol. 1997, No. 03, Mar. 31, 1997 & JP 08 300157 A(Daido Steel Co., Ltd.), Nov. 19, 1996 * abstract; Figures 3,4 *.
Patent Abstracts of Japan, vol. 1995, No. 07, Aug. 31, 1995 & JP 07 099097 A(Nippon Uerudeingurotsuto KK), Apr. 11, 1995 * abstract * * paragraphs 0021, 0024, 0027, 0002 *.

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