Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1987-06-11
1988-07-26
Fuller, B. R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181250, 181266, 181272, F01N 102, F01N 718
Patent
active
047594233
ABSTRACT:
A muffler is provided including a pair of internal plates formed to define an array of tubes. At least one external shell is formed to define at least one chamber which will surround and enclose a selected portion of the array of tubes. Selected portions of certain tubes will be formed to include perforations. Portions of certain tubes will further undergo cross-sectional changes to control the flow of exhaust gases through the muffler. Certain channels between adjacent chambers of the external shell will be disposed to extend substantially continuously from peripheral portions of the adjacent chambers formed in the external shell. In certain embodiments, a controlled communication is provided between a low frequency resonating chamber and an adjacent expansion chamber. In other embodiments, additional formed layers are provided to enhance either heat or noise insulation.
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Emrick James W.
Harwood Jon W.
Main Perry A.
Rosa Bruno A.
AP Industries, Inc.
Casella Anthony J.
Fuller B. R.
Hespos Gerald E.
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