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US 4,759,423 AGranted
Tube and chamber construction for an exhaust muffler
AssigneeAP Industries, Inc.
InventorsJon W. Harwood, Bruno A. Rosa, James W. Emrick, Perry A. Main
Life of this patent
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AssigneeAP Industries, Inc.
InventorsJon W. Harwood, Bruno A. Rosa, James W. Emrick, Perry A. Main
Estimating the term…
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.
An exhaust muffler comprising at least one external shell formed to define an inlet to the muffler, an outlet from the muffler and a plurality of chambers, each said chamber comprising at least one peripheral side wall, at least one channel extending between said chambers, said channel being disposed such that portions of said channel are generally aligned with portions of the peripheral side walls of the chambers between which said channel extends, said muffler further comprising a pair of plates disposed in face to face relationship and rigidly connected to said formed external shell, said plates being formed to define at least one tube therebetween, said tube being in communication with the inlet and the outlet and being disposed to be engaged by said channel, longitudinally extending portions of said tube being substantially in face to face contact with portions of said peripheral side walls of said chambers, whereby the relative positions of said tube, said channel and said peripheral side walls substantially avoid overstressing the external shell.
A muffler comprising a pair of formed external shells and a pair of formed internal plates, each said external shell being formed to define an inlet to the muffler, an outlet from the muffler and a plurality of chambers with each said chamber including a pair of generally opposed side walls, the side walls of one said chamber being generally aligned with the side walls of the other chamber, each said external shell further comprising a pair of formed channels extending between said chambers such that a portion of each said channel is generally aligned with and extends between the aligned walls of said chambers, said internal plates being formed to define at least two tubes therebetween, said tubes being in communication with the inlet and the outlet, and being disposed to be engaged respectively by said channels, and being disposed such that portions of each of said tubes are disposed generally in face to face relationship with one of said side walls of each said chamber, whereby the relative positions of said tube, said channel and said side walls substantially avoid overstressing the external shell.
An exhaust muffler comprising:
Dependencies are inferred from the claim text.