Exhaust silencer for engines and generators

Details Exhaust silencer for engines and generators Exhaust silencer for engines and generators

1996-11-27

1997-09-23

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181268, 181274, 181282, F01N 108

Patent

active

056707576

ABSTRACT:
An exhaust silencer for receiving exhaust gasses from an engine includes inner and outer cylindrical walls and top and bottom closure plates. The inner wall and the top and bottom closure plates define a central collection chamber. Baffles extend alternately from the inner cylindrical wall towards the outer cylindrical wall and from the outer cylindrical wall towards the inner cylindrical wall, so as to define an undulating path for exhaust gasses as they pass from the central collection chamber to an outlet. Sound insulating material is attached to each of the upstream surfaces of the baffles, to the outer surface of the central collection chamber, to the inner surface of the outer cylindrical wall, and to the inner surfaces of each of the top and bottom closure plates. The sound insulating material is protected by expanded metal. The baffles are attached at their vertical edges to the expanded metal and not to the actual inner and outer cylindrical walls themselves. Transmission of sound to the outer cylindrical wall is thus markedly reduced.

REFERENCES:
patent: 2513229 (1950-06-01), Bourne et al.
patent: 3126979 (1964-03-01), Marx
patent: 3756027 (1973-09-01), Gotoh et al.
patent: 3887032 (1975-06-01), Harris
patent: 3927731 (1975-12-01), Lancaster
patent: 4122913 (1978-10-01), Stemp
patent: 4786299 (1988-11-01), DeMarco

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