Pipe joints or couplings – Flexible joint – rigid members – Bellows
Reexamination Certificate
2006-09-22
2009-02-03
Bochna, David E (Department: 3679)
Pipe joints or couplings
Flexible joint, rigid members
Bellows
C208S161000, C208S164000, C422S144000, C422S147000, C029S454000
Reexamination Certificate
active
07484773
ABSTRACT:
Self purging expansion joint can include first annular seal sleeve connecting bellows to first conduit and second annular seal sleeve connecting bellows to second conduit. Flow-restricting orifice(s) can allow a higher pressure external fluid to flow through the annular passage to purge the bellows and into the primary fluid flow passage of the expansion joint containing a lower pressure fluid. Self purging expansion joint can be utilized in a disengager vessel of a fluid catalytic cracking (FCC) unit, for example, between primary and secondary stripping cyclones.
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Bochna David E
KBR IP Legal
Kellogg Brown & Root LLC
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