Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1997-06-24
1999-09-14
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
55DIG30, 123198E, F02M 3500
Patent
active
059526220
ABSTRACT:
A moldable acoustic device is internally coupled to a vehicle engine's air filter. The moldable acoustic device has the shape of a circular box or of any other shape, and includes a plate of acoustic absorbing material provided with porosities or a set of plates of acoustic materials provided with porosities, superimposed and glued to each other, having its shape predetermined pursuant to the internal and acoustic characteristics of the conventional air filter to which it will be internally coupled. The moldable acoustic device is essentially an acoustic internal lining for the purpose of absorbing acoustic waves generated by engine inlet noises, that is coupled by gluing or otherwise inside the air filter's upper compartment and/or lower compartment. The moldable acoustic device is also removable or not from the compartments.
REFERENCES:
patent: 4483413 (1984-11-01), Ohashi
patent: 4619344 (1986-10-01), Uesugi et al.
patent: 4733750 (1988-03-01), Poirier et al.
patent: 5467747 (1995-11-01), Brandt et al.
patent: 5649986 (1997-07-01), Mueller
Abramson Ronald
Dang Khanh
Sullivan Peter A.
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