Silencer for outboard motor

Details Silencer for outboard motor Silencer for outboard motor

1994-09-23

1996-02-20

Okonsky, David A.

Internal-combustion engines

Intake manifold

Manifold having plenum

12318457, F02M 3512

Patent

active

054920892

ABSTRACT:
A protective cowling and air silencing device for the power head of a watercraft propulsion unit. The cowling is provided with an atmospheric air inlet opening, and a duct is provided internally in the cowling for assisting in water separation by directing the inlet air downwardly toward a drain opening. The engine is provided with charge formers that have an air silencing device that is provided with at least one resonating chamber on the side of the charge former and which communicates with a delivery passage of the device through a tuning neck for silencing purposes.

REFERENCES:
patent: 2798470 (1957-02-01), Kickhaefer
patent: 3557902 (1971-01-01), Brown
patent: 4326600 (1982-04-01), Okazaki et al.
patent: 4522602 (1985-06-01), Okazaki
patent: 4570744 (1986-02-01), Hoshiba
patent: 4734070 (1988-03-01), Mondek
patent: 4887692 (1989-12-01), Ohtani et al.
patent: 4967704 (1990-11-01), Imaeda
patent: 5035211 (1991-07-01), Mate et al.
patent: 5277633 (1994-01-01), Kato et al.
patent: 5328395 (1994-07-01), Oishi

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