| US 7,546,899 B2 | ||
| Lightweight polymer muffler apparatus and method of making same | ||
| Reg Tomerlin, Los Angeles, Calif. (US); David S. Larner, Fountain Valley, Calif. (US); and Kathy Jun, Cerritos, Calif. (US) | ||
| Assigned to Arrowhead Products Corporation, Los Alamitos, Calif. (US) | ||
| Filed on Oct. 05, 2005, as Appl. No. 11/243,914. | ||
| Prior Publication US 2007/0074930 A1, Apr. 05, 2007 | ||
| Int. Cl. F01N 1/10 (2006.01); F01N 1/04 (2006.01); F01N 1/24 (2006.01); F16L 11/15 (2006.01); F16L 11/26 (2006.01); F01N 1/02 (2006.01); F16L 11/12 (2006.01) | ||
| U.S. Cl. 181—252 [181/256; 285/49] | 9 Claims |
| 1. An aerospace environmental control system muffler apparatus for flowing a stream of conditioning air and comprising:
a polymeric corrugated cover tube having a cover wall thickness of no more than 0.020 inches;
an open cell polymer attenuator tube slip fit into the cover tube to be constrained therein and including a low toxicity,
smoke and high temperature resistant self supporting wall having a longitudinal inner surface defining an elongated through
passage and resistant to separation of the open cell polymer as the air flows longitudinally there along in intimate flow
relationship; and
end fittings secured to the opposite ends of the tubes and affixing the tubes together.
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