Venturi muffler
OwnerJohn T. Sullivaninventor
Life of this patent
Estimating the term…
Abstract
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.
Claims28
A venturi muffler comprising an exhaust flow path along which exhaust gasses pass in a direction from an inlet to an outlet, a plurality of substantially annular chambers disposed in axially contiguous relationship to each other in surrounding relationship to the exhaust flow path, means for effecting the introduction of a fluid medium into an upstream substantially annular chamber portion of each substantially annular chamber, means for defining a substantially annular fluid media discharge passage in fluid communication between each substantially annular chamber and the exhaust flow path in surrounding relationship to the exhaust flow path, each annular fluid media discharge passage including an annular converging venturi flow creating a flow path portion converging in the direction of the exhaust flow path whereby the flow of exhaust gasses create a partial vacuum in said plurality of substantially annular chambers to effect sound attenuation, and a plurality of second substantially annular chambers disposed in axially contiguous relationship to each other and in surrounding relationship to the first-mentioned plurality of substantially annular chambers, and said first-mentioned and second substantially annular chambers are not in fluid communication with each other.
A venturi muffler comprising an exhaust flow path along which exhaust gasses pass in a direction from an inlet to an outlet, a plurality of substantially annular chambers disposed in axially contiguous relationship to each other in surrounding relationship to the exhaust flow path, means for effecting the introduction of a fluid medium into an upstream substantially annular chamber portion of each substantially annular chamber, means for defining a substantially annular fluid media discharge passage in fluid communication between each substantially annular chamber and the exhaust flow path in surrounding relationship to the exhaust flow path, each annular fluid media discharge passage including an annular converging venturi flow creating a flow path portion converging in the direction of the exhaust flow path whereby the flow of exhaust gasses create a partial vacuum in said plurality of substantially annular chambers to effect sound attenuation, and a plurality of second substantially annular chambers disposed in axially contiguous relationship to each other and in surrounding relationship to the first-mentioned plurality of substantially annular chambers, and said first-mentioned and second substantially annular chambers are not in fluid communication with each other. a plurality of second substantially annular chambers disposed in axially contiguous relationship to each other and in surrounding relationship to the first-mentioned plurality of substantially annular chambers, said first-mentioned and second substantially annular chambers are not in fluid communication with each other, and means for placing said second substantially annular chambers in fluid communication with each other and with said inlet and outlet.
A venturi muffler comprising an exhaust flow path along which exhaust gasses pass between an inlet and an outlet, a plurality of segments each including an outermost substantially peripheral wall, a medial substantially annular wall and an innermost peripheral wall converging in the direction of exhaust gas flow from said inlet to said outlet, means for uniting said plurality of segments into a substantially rigid muffler, said uniting means being a continuous peripheral weld between said outermost substantially peripheral walls of axially adjacent segments, said outermost substantially peripheral walls collectively defining a substantially contiguous outer wall of said muffler, and said innermost peripheral walls collectively defining said exhaust gasses flow path.
Dependencies are inferred from the claim text.