07905319 is referenced by 15 patents and cites 19 patents.

A venturi muffler is made of a plurality of metallic tubular stepped members which are stacked together and define at least one sound-reflective chamber which opens through an annular venturi passage into an axial flow passage of the venturi muffler thereby creating a partial vacuum in the annular chamber. The annular chambers include aligned openings through which exhaust gasses flow but are also reflected by walls of the sound-reflective chambers. Therefore, the exhaust sound or noise is dampened by the cancellation of sound waves 180 degrees out of phase with each other, the creation of a partial vacuum through which sound cannot propagate or propagates minimally, and by the heat removed by all of the metallic heat-conductive venturi-forming segments of the venturi muffler.

Venturi muffler
Application Number
Publication Number
7905319 (B2)
Application Date
June 11, 2008
Publication Date
March 15, 2011
John T Sullivan
David R Schaffer Esq
Miles & Stockbridge P C
F01N 1/02
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