Patent ID: 9422843
Filing Date: 2016-08-23
CPC Classification: F01N

Claim Text:
1. A muffler for use with an internal combustion engine for generating resonance to cancel or enhance engine noise, comprising: a case having a body defining an internal area, said case including an inlet configured to provide access into said body and an outlet displaced from said inlet and configured to provide access out of said body; and a plurality of elongated members positioned in said body, said plurality of elongated members having respective first portions attached to said case and positioned in a manner allowing exhaust to pass by and directly excite the elongated members to produce resonant tones, and having respective free ends extending into said internal area away from said respective first portions; wherein said plurality of elongated members are separated from one another and from said case except at a final point of attachment of said respective first portions to said case; wherein said plurality of elongated members are immediately adjacent and immediately proximate to each other at the final point of attachment; wherein said plurality of elongated members have a length extending away from said final point of attachment of said respective immediately proximate first portions such that said plurality of elongated members interact to provide a predetermined resonance when contacted by flowing exhaust gasses, whereby altering sound produced by said flowing exhaust gasses.