Pipe joints or couplings – Sleeve
Reexamination Certificate
2011-07-26
2011-07-26
Bochna, David E (Department: 3679)
Pipe joints or couplings
Sleeve
C285S013000, C285S924000, C285S901000
Reexamination Certificate
active
07984934
ABSTRACT:
Copper purge fittings for brazing components of a special gas delivery line together are provided. An orifice is located on the top or end portion of each fitting to create a continuous flow of inert purging gas through the delivery line under construction while brazing. Each fitting will reach temperatures exceeding 1500 degrees. By having a continuous flow of inert gas while brazing, the protection of the interior portion of the system remains intact. Without a purge in place, the intense heat would create a rapid immediate buildup of carbon and other contaminates. Brazing is only commenced after the elimination of harmful oxygen and proper flow of purging gas is measured. The purging gas pressure is lowered if it becomes high enough to potentially cause separation of tubular sections from the purge fittings and is raised if a low flow rate is detected indicating potential insufficient flow of purging gas.
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Bochna David E
Burns & Levinson LLP
Erlich, Esq. Jacob N.
Nathans, Esq. Robert
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