Device for a pipe flange seal

Details Device for a pipe flange seal Device for a pipe flange seal

2006-02-28

2006-02-28

Pickard, Alison K. (Department: 3673)

Seal for a joint or juncture

Seal combined with indicator, sampler, or inspection feature

C277S320000, C277S614000, C285S093000

Reexamination Certificate

active

07004470

ABSTRACT:
An arrangement for access to the external cylindrical/barrel shaped surface (16b) of a gasket (16) in flange connections in a piping installation in which the piping installation comprises flange halves (1, 1′) of the type in which a gasket (16) is positioned between the flange halves (1, 1′) and the gasket (16) is designed to seal against seating surfaces (2a,2c) formed by annular grooves (2, 2′) in the opposite end faces of the flange halves (1, 1′), and where annuli (22, 22′) are defined by the end faces (16c) of the gasket (16) and the grooves (2, 2′), which thereby seal along the inner and outer periphery, and where at least one groove (14) runs from the annular groove (2, 2′), essentially in the radial, outward direction.

REFERENCES:
patent: 3141685 (1964-07-01), Watts
patent: 3628812 (1971-12-01), Larralde et al.
patent: 3747963 (1973-07-01), Shivak
patent: 4168853 (1979-09-01), Ahlstone
patent: 4272109 (1981-06-01), Ahlstone
patent: 4410186 (1983-10-01), Pierce, Jr.
patent: 4950000 (1990-08-01), Richardson
patent: 5231867 (1993-08-01), Serwatzky
patent: 6299216 (2001-10-01), Thompson
patent: 6318766 (2001-11-01), Babuder et al.
patent: 1558857 (1980-01-01), None
patent: 175832 (1994-09-01), None

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