Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1984-06-27
1986-12-30
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181265, 181272, F01N 108
Patent
active
046322167
ABSTRACT:
The present invention is directed to muffler apparatus and a method for making same. The apparatus includes inlet and outlet tubes with a plurality of baffles extending from the inlet and outlet tubes to a housing. The outlet tube has a constricted portion near its inlet end formed with creases and lobes and a flare at the end. Such constriction increases the housing to outlet tube area ratio of the muffler which results in advantageous attenuation characteristics. The process for making the muffler is simpler than known methods since the outlet tube is formed and baffles pressed onto it in a single step.
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Bethke Timothy A.
Schmeichel Steven D.
Wagner Wayne M.
Donaldson & Company, Inc.
Fuller Benjamin R.
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