Metal fusion bonding – Seam backup means
Patent
1978-07-19
1980-05-06
Husar, Francis S.
Metal fusion bonding
Seam backup means
219160, 228 4913, B23K 522
Patent
active
042013267
ABSTRACT:
An improved back-up pad apparatus for use in externally welding abutting ends of pipe comprises a plurality of arcuate back-up pads positioned to face the interior of the weld. Each arcuate pad is mounted on a support shoe for radial movement into and out of biased engagement with the interior cylindrical surfaces of the pipes. The arcuate pads are pivotally supported by the support shoes and biased about axes parallel with the centerline of the pipe to permit retraction of the pads without interference. Preferably, the pads are constructed of hard anodized aluminum material.
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Crosby Gene P.
Crutcher Resources Corporation
Husar Francis S.
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