Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1997-05-19
1999-01-12
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181224, 181275, F01N 124
Patent
active
058593934
ABSTRACT:
An acoustical silencer (10) includes a housing (12) extending generally axially vertically upwardly from an inlet (14) to an outlet (16). A laterally extending upper divider wall (18) is attached to the housing and has a plurality of apertures (22) therethrough. A plurality of tubes (24, 34) extend axially vertically through respective apertures and have an integral bulge (26) crimped radially outwardly to a larger radius than the aperture and engaging the topside of the upper divider wall to suspend the tube therefrom. A laterally extending lower divider wall (28) has a plurality of apertures (30) therethrough. The tubes extend axially vertically through the apertures of the lower divider wall and some have integral bulges (32) crimped radially outwardly to a larger radius than the aperture of the lower divider wall and engage the underside of the lower divider wall to suspend the latter from the tubes. The tubes are continuous spiral-wound perforated members completely weldless, including along their entire length and including at their interface with each of the divider walls. The structure reduces manufacturing cost, and enables large cross sectional flow area without sacrificing length to diameter tube grade ratios.
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Brazys Daniel M.
Cummins, Jr. Jim R.
Kendziera Ronald W.
Moritz Lee H.
Weeden Jeffery L.
Dang Khanh
Nelson Industries Inc.
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