Exhaust device of boat

Details Exhaust device of boat Exhaust device of boat

2007-02-27

2007-02-27

Avila, Stephen (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

C440S08900C

Reexamination Certificate

active

11392705

ABSTRACT:
An open/close valve can decrease the exhaust resistance as much as possible in a usual operation. An open/close valve includes a valve casing and a valve element that is housed in the valve casing in a vertically movable manner. The valve casing includes a cylindrical portion that extends vertically. A through hole is formed in the cylindrical portion. A bottom portion is formed on a bottom of the cylindrical portion. A discharge inlet is formed in an upper portion of the cylindrical portion. The valve element includes a cylindrical body that is arranged along an inner surface of the cylindrical portion and has a height that maintains an opening of the through hole and a seal plate that covers an upper portion of the cylindrical body and has a size capable of closing the exhaust inlet.

REFERENCES:
patent: 4498876 (1985-02-01), Zemlicka
patent: 6220907 (2001-04-01), Shimizu
patent: 6773317 (2004-08-01), Dagenais et al.
patent: 2004-98966 (2004-04-01), None

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