Pipe joints or couplings – Packed – Flanged pipe
Patent
1995-04-07
1996-05-21
Arola, Dave W.
Pipe joints or couplings
Packed
Flanged pipe
285379, 285910, F16L 1700
Patent
active
055182801
ABSTRACT:
A gasket for use with exhaust systems having at least one header flange and an exhaust pipe flange joined thereto. The gasket includes an inner annular sealing ring like member deformable under pressure mounted on an outer annular metal retainer ring sized to be mounted at a flange junction between said header flange and said exhaust pipe flange. The inner ring has an outside diameter slightly greater than the inside diameter of the inner ring to deformably support the inner ring on the outer ring. The outer ring inside diameter is greater than the inner diameter of the flange junction to permit the inner ring to be compressed upon forming the junction. The inner ring is formed from a non-asbestos fiber fused with spiral wound metal wire. It is preferred that the non-asbestos fiber is an aramid fiber and the spiral wound metal wire is stainless steel. The thickness of the inner ring is at least twice as thick as the thickness of the outer ring. It is also preferred that the inner ring has an inner diameter sufficiently large to avoid restricting flow of exhaust gas through the junction. For ease and permanence of mounting, the outer ring is provided with annularly spaced holes patterned to align with bolt holes on the flanges.
REFERENCES:
patent: 3189371 (1995-06-01), Swan
patent: 3302953 (1967-02-01), Glasgow
patent: 4756561 (1988-07-01), Kawata et al.
patent: 4928998 (1990-05-01), Brondener
patent: 5174615 (1992-12-01), Foster et al.
patent: 5228726 (1993-07-01), Brown et al.
patent: 5257834 (1993-11-01), Zeidler et al.
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