Metal fusion bonding – Process – With protecting of work or filler or applying flux
Reexamination Certificate
2006-04-18
2006-04-18
Edmondson, Lynne R. (Department: 1725)
Metal fusion bonding
Process
With protecting of work or filler or applying flux
C228S215000, C228S050000
Reexamination Certificate
active
07028881
ABSTRACT:
Method for welding objects having limited backside access to a cavity behind a region to be welded. The method includes inserting a fugitive backing material in an installation state into a first portion of the cavity proximate the region to be welded and then transforming the fugitive backing material to a rigid state. The method further includes forming a weld in the region and then transforming the fugitive backing material to a removable state and removing the fugitive backing material from the cavity. The method may also include placing a pre-formed weld backing in the cavity and filling the cavity with a fugitive backing material. The method further includes transforming the fugitive backing material to a rigid state, forming a weld, and transforming the fugitive backing material to a removable state. The method may further include removing the fugitive backing material and removing the pre-formed weld backing from the cavity.
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Ditzel Peter J.
Zombo Paul J.
Edmondson Lynne R.
Siemens Power Generation, Inc.
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