Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1999-09-22
2000-07-04
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181257, F01N 124
Patent
active
060824883
ABSTRACT:
A muffler includes a first inner tube assembly including an inner tube, an outer tube, and a first glassfiber layer sandwiched between the inner tube and the outer tube. Each of the inner tube and the outer tube includes apertures through which exhaust gas is passable. The inner tube defines a primary passage for the exhaust gas. A second inner tube assembly includes a tubular member for receiving the first inner tube assembly and a second glassfiber layer enclosing the tubular member. The tubular member includes apertures through which the exhaust gas is passable. The tubular member and the outer tube of the first inner tube assembly have a space therebetween, thereby defining a secondary passage for the exhaust gas. An outer casing receives the second inner tube assembly. A brace member is attached to each end of the outer casing for securely retaining the first inner tube assembly and the second inner tube assembly in place. Each brace member includes a plurality of third apertures communicated with the primary passage and the secondary passage. An end cover is attached to each end of the outer casing for enclosure purpose. Each end cover includes a guide tube four guiding the exhaust gas in and out of the primary passage and the secondary passage of the muffler.
REFERENCES:
patent: 3710891 (1973-01-01), Flugger
patent: 5350888 (1994-09-01), Sager, Jr. et al.
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