Muffler assembly

Details Muffler assembly Muffler assembly

1989-04-28

1990-07-17

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181272, 181276, F01N 102, F01N 108, F01N 718

Patent

active

049415450

ABSTRACT:
A muffler assembly includes a pair of outer shells mating to define a muffler chamber and a pair of internal tuning plates mating to define inlet and outlet tubes in the muffler chamber. Drop-in baffles are used to divide the muffler chamber into an expansion chamber, a pair of exhaust turnaround chambers, and a pair of resonance chambers. The two outer shells and first tuning plates are mechanically locked together at the perimeter of the muffler assembly and the second tuning plate is piggybacked onto the first tuning plate to reduce the number of material layers included in the mechanical lock. Each of the outer shells includes one or more ribs and channels for stiffening the outer shell to reduce vibration noise and to conduct condensate developing in the muffler chamber either to a hotter region where it will vaporize or to a drain.

REFERENCES:
patent: 3638756 (1972-02-01), Thiele
patent: 4396090 (1983-08-01), Wolfhugel
patent: 4456091 (1984-06-01), Blanchot
patent: 4700806 (1987-10-01), Harwood
patent: 4736817 (1988-04-01), Harwood
patent: 4759423 (1988-07-01), Harwood et al.
patent: 4760894 (1988-08-01), Harwood et al.
patent: 4765437 (1988-08-01), Harwood et al.
patent: 4821840 (1989-04-01), Harwood et al.
patent: 4865154 (1989-09-01), Hanson et al.

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