Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1982-03-01
1984-12-11
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181255, 181263, 181283, F01N 110, F01N 114
Patent
active
044872895
ABSTRACT:
An exhaust muffler having a protective shield to reduce noise radiation and to decrease the temperature of the exhaust gases being discharged from the muffler. The muffler is composed of an outer body enclosed at its ends by flanges, and an outer insulated shell is spaced outwardly from the body and is connected to the peripheral edges of the flanges. Holes are provided in the flanges which communicate with the space between the shell and the body so that air is drawn by convection through the space between the outer body and the shell. A tubular member is spaced outwardly of the outlet pipe of the muffler and the outer end of the tubular member projects outwardly beyond the outer end of the outlet pipe. Openings are provided in the base of the tubular member and exhaust gas being discharged from the outlet pipe creates an aspirating action, so that air is drawn in through the openings into the space between the tubular member and the outlet pipe by both convection and aspirating action to aid in cooling the exhaust gases being discharged through the outlet pipe.
REFERENCES:
patent: 1938973 (1933-12-01), Oldberg
patent: 2229576 (1941-01-01), Kirby
patent: 2831548 (1958-04-01), Barkelew
patent: 3073684 (1963-01-01), Williams, Sr.
patent: 4147230 (1979-04-01), Ormond et al.
patent: 4265332 (1981-05-01), Presnall et al.
Nelson Drawing 17221-A, 10-1-79.
Nelson Drawing 17653-B, 11-21-79.
Nelson Drawing T-11880, 11-12-80.
Nelson Drawing T-11559, 3-6-70.
Nelson Drawing 11620-N, 4-13-70.
Nelson Drawing T-11436, 11-26-69.
Nelson Drawing T-10828, 8-5-69.
Jasensky Richard J.
Kicinski Kenneth J.
Printiss, Sr. Frederick H.
Fuller Benjamin R.
Nelson Industries Inc.
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