Exhaust silencing device

Details Exhaust silencing device Exhaust silencing device

1995-06-07

1998-01-13

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181265, F01N 108

Patent

active

057082383

ABSTRACT:
In an exhaust silencing device having inner tubes which are connected to an exhaust pipe connected to an engine and provided with a plurality of through holes, and an outer tube which covers the inner tubes. The occurrence of a whistling sound is prevented while avoiding the use of a sound absorbing material. Recesses are provided on the inner surface of the inner tube, which, together with the outer tube, form an annular expansion chamber.

REFERENCES:
patent: 2985252 (1961-05-01), Morrish et al.
patent: 3608667 (1971-09-01), Foster
patent: 4023645 (1977-05-01), Retka et al.
patent: 4147230 (1979-04-01), Ormond et al.
patent: 4719988 (1988-01-01), Kinoushi et al.

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