Gasket for flange connections

Details Gasket for flange connections Gasket for flange connections

2005-11-08

2005-11-08

Peavey, Enoch (Department: 3676)

Seal for a joint or juncture

Seal between fixed parts or static contact against...

Contact seal for a pipe, conduit, or cable

C277S600000, C277S627000, C277S652000

Reexamination Certificate

active

06962349

ABSTRACT:
A flat gasket for flange connections has a leakage rate below the limit value of 1*10−5kPa*1/(s*m). The gasket assembly has a thick, areal, pressure-resistant core formed from at least one layer of graphite foil with a base weight of at most 1500 g/m2, or a multilayer sandwich of such graphite foils and metal interlayers. The core is embedded between two metal foils, and the surfaces that are remote from the core are covered by covering layers of graphite foil with a base weight of at most 350 g/m2. A ratio of the base weight of the graphite foil of the covering layers to the base weight of the graphite foil of the core lies between 1:3 and 1:7.

REFERENCES:
patent: 5509993 (1996-04-01), Hirschvogel
patent: 5618050 (1997-04-01), Jeanne et al.
patent: 6258457 (2001-07-01), Öttinger et al.
patent: 6565099 (2003-05-01), Öttinger et al.
patent: 0 616 884 (1994-09-01), None
patent: 0 935 085 (1999-08-01), None
“Technische Anleitung zur Reinhaltung der Luft (TA Luft)” [Technical Directive on Air Purity], as in force from Jul., 2002, front page, table of contents, pp. 63, 64, and Statement of Relevance.

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