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US 5,016,728 AGranted
Air intake noise suppressor
AssigneeArctco, Inc.
InventorDennis P. Zulawski
Life of this patent
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AssigneeArctco, Inc.
InventorDennis P. Zulawski
Estimating the term…
An air intake noise suppressor for a snowmobile engine disposed on the intake side of a carburetor has an enclosure with a front face having apertures therein connected to the carburetor and a rear face canted relative to the front face. The rear face has an integrally formed frustoconical extension for permitting air to flow into the enclosure. The frustoconical extension extends into the enclosure and the enclosure has a irregular bottom wall providing additional reflective surfaces inside the enclosure. Sound emanating from the carburetor enters the enclosure through the apertures and is reflected and entrapped therein unit it is attenuated. The small amount of sound that may escape the enclosure through the frustoconical extension is either attenuated in a juxtaposed enclosure formed by a shroud or directed through louvers down and away to either side of the driver.
An air intake noise suppressor for attenuating noise from carburetors of a snowmobile engine, the suppressor comprising an irregularly shaped enclosure having a front face and a rear face canted relative to the front face, a truncated conical inlet integral with the rear face extending into the enclosure from the rear face, and outlet apertures for connection to carburetors in the front face, whereby noise emanating from the carburetors and entering the enclosure through the outlet apertures does not directly impinge on an open end of the truncated cone and is reflected within the enclosure.
An air intake noise suppressor for attenuating noise from carburetors, the suppressor comprising an irregularly shaped enclosure having a front face and a rear face canted relative to the front face, a frustoconical air inlet with a central axis extending into the enclosure from the rear face, and an outlet aperture for connection to a carburetor in the front face, the outlet aperture having a central axis and being disposed in the front face such the axis of the air inlet does not intersect the axis of the outlet aperture within the enclosure, whereby noise from the carburetors entering the enclosure through the outlet aperture is reflected with most of the noise being attenuated within the enclosure.
An air intake noise suppressor for attenuating noise from a carburetor mounted to an engine of a snowmobile, the suppressor comprising an irregularly shaped enclosure having a front face and a rear face canted relative to the front face, a frustoconical air inlet with a central axis extending into the enclosure from the rear face, and an outlet aperture for connection to a carburetor in the front face, the outlet aperture having a central axis and being disposed in the front face such the axis of the air inlet does not intersect the axis of the outlet aperture within the enclosure, the enclosure including means for facilitating attachment of the enclosure to a snowmobile chassis, whereby noise from the carburetor entering the enclosure through the outlet aperture is reflected with most of the noise being attenuated within the enclosure therein.
Dependencies are inferred from the claim text.