Method and apparatus for treating exhaust gases particularly for

Details Method and apparatus for treating exhaust gases particularly for Method and apparatus for treating exhaust gases particularly for

1978-10-13

1981-01-13

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181237, 181243, 181255, 181265, 181239, F01N 108

Patent

active

042444420

ABSTRACT:
A muffler construction, particularly for exhaust gases of air-operated tools, comprises, a tubular sleeve having a passage therethrough, an exhaust gas pipe connected into the sleeve and defining a restricted flow passage with the sleeve, first and second opposed cylindrical coaxial shell sections, each having a closed end wall at their respective outer ends and facing in opposite directions engaged with the exhaust gas pipe, and sidewalls spaced radially outwardly from the sleeve. The exhaust gas pipe has a gas pipe discharge and there are partition walls in the shell sections defining a first expansion chamber and at least one additional expansion chamber. A constricted flow passage is defined between the first expansion chamber and the at least one additional expansion chamber with sealing and enclosing members closing the sidewalls of the first and second shell sections so as to define the first expansion chamber and at least one additional expansion chamber within the shell sections. The exhaust gases from the discharge enter into the first expansion chamber and form a vortex therein with the gases then flowing into the restricted passage into the additional chamber wherein a second vortex is generated. A final gas discharge is defined in the wall of the second shell sections which communicates with the atmosphere.

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patent: 3918549 (1975-11-01), Murphy
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patent: 4027740 (1977-06-01), Martin
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