Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1999-03-04
2000-04-18
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181272, F01N 108
Patent
active
060503637
ABSTRACT:
A cylindrically shaped muffler for a gas engine with substantially reduced noise. It includes: (a) a cylindrical shell having a shell-bore, an inlet and an outlet; (b) a plurality of first hollow cones suspended within but is supported by the shell-bore, the first hollow cones having their largest diameters smaller than that of the shell-bore with their apexes pointing toward the inlet of the cylindrical shell; (c) a plurality of hollow truncated second cones having their greatest diameters equal to that of the shell-bore in which they are supported in reverse to the first hollow cones and alternate therewith, so as to have their smallest diameter portions pointing toward the outlet of the cylindrical shell; and (d) a circular stopper suspended inside the hollow truncated second cone near its smallest diameter portion in such a manner to create eddy currents in gas flow so as to absorb noise. The first hollow cones are affixed to the shell-bore by a plurality of connection pillars, and the second truncated hollow cones are affixed to the cylindrical shell from outside thereof.
REFERENCES:
patent: 624062 (1899-05-01), Matthews
patent: 4574914 (1986-03-01), Flungger
patent: 4890691 (1990-01-01), Chinh-ho
Dang Khanh
Liauh W. Wayne
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