Expansion seal

Details Expansion seal Expansion seal

2007-07-03

2007-07-03

Dunwoody, Aaron (Department: 3679)

Pipe joints or couplings

Pipe to discreet nipple or sleeve to plate

C285S196000, C277S598000, C277S603000

Reexamination Certificate

active

11295580

ABSTRACT:
A hot gas seal for a conduit penetrating the wall(s) of a vessel such as a heat recovery steam generator unit. The seal includes three serially-arranged, independent insulation segments or pillows. The pillow adjacent the vessel casing and the center pillow employ metal sheets to sandwich insulation therebetween. The center pillow travels laterally with the conduit. The third or outer pillow terminates in a split seal ring having a containment structure attached thereto.

REFERENCES:
patent: 1914741 (1933-06-01), Gysling
patent: 3136557 (1964-06-01), Tauscher
patent: 3228673 (1966-01-01), Hinks
patent: 4140338 (1979-02-01), Kazmierski et al.
patent: 4270760 (1981-06-01), Greiman
patent: 4273365 (1981-06-01), Hagar
patent: 5876042 (1999-03-01), Graf et al.
patent: 6460893 (2002-10-01), McGrath
patent: 6834998 (2004-12-01), Hinks

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