Lightweight polymer muffler apparatus and method of making same
AssigneeArrowhead Products Corporation
InventorsReg Tomerlin, David S. Larner, Kathy Jun
Life of this patent
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Abstract
An environmental control system muffler including a thin wall polyetherether ketone (PEEK) cover tube, an open cell polymer attenuator tube slip fit there into and polymer end fitting securing the two tubes together and cooperating to form a pneumatic seal with the cover tube. The method of making the muffler apparatus includes the selection of tubing constructed of such PEEK corrugated construction and the open cell polymer noise attenuation construction, telescoping the tubes together and securing the end fittings thereto.
Claims9
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.
An aerospace environmental control system muffler apparatus for flowing a stream of conditioning air and comprising:
- an elongated flexible polymeric corrugated cover tube having a wall thickness of no more than 0.020 inches;
- an elongated flexible, flame resistant self supporting open cell polymer, distended wall defining an attenuator tube slip fit into the cover tube to be constrained therein and configured with an elongated inner surface defining a through passage to receive the air in intimate flow relationship to attenuate vibrations in the air;
- and
- end fittings secured to the opposite ends of the tubes and affixing the tubes together whereby the tubes may be flexed to assume different selected circuitous longitudinal configurations and the polymer wall will tend to remain distended to receive flow of the stream in intimate contact with the interior surface throughout the length thereof.
Dependencies are inferred from the claim text.