Double pipe exhaust manifold

Power plants – Internal combustion engine with treatment or handling of... – Common receiver having inlets from plural cylinder

Reexamination Certificate

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Details

C060S272000, C060S282000, C060S312000, C060S322000

Reexamination Certificate

active

06874317

ABSTRACT:
A double pipe exhaust manifold includes an inner pipe, an outer pipe formed in a cylindrical shape by joining at least one side edge thereof by welding, a space retaining member disposed in an annular space defined between the inner pipe and the outer pipe, a connection pipe connecting to a exhaust gas recirculation valve, and a mesh ring. Opening holes are formed in the inner pipe and the outer pipe so that the opening holes are opposed to each in a radial direction of the pipes. The connection pipe is connected to the opening hole of the outer pipe. The mesh ring is interposed between the inner pipe and the outer pipe in a state that the mesh ring plugs an annular opening part defined between opening edges of the opening holes.

REFERENCES:
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patent: 5799395 (1998-09-01), Nording et al.
patent: 5832723 (1998-11-01), Iwata et al.
patent: 6082103 (2000-07-01), Sugiura et al.
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patent: 6247552 (2001-06-01), Kovar et al.
patent: 6-10662 (1994-01-01), None
patent: 7-317540 (1995-12-01), None
patent: 9-4447 (1997-01-01), None
patent: 9-88578 (1997-03-01), None
patent: 9-242537 (1997-09-01), None
patent: 10-266844 (1998-10-01), None
patent: 10-266845 (1998-10-01), None
patent: 10-266847 (1998-10-01), None
patent: 10-266848 (1998-10-01), None
patent: 10-266849 (1998-10-01), None

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