Double-walled structure and method of producing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Aug 23, 2001
app pub date -
Feb 21, 2001
filing date -
Feb 22, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A double-walled-structure, such as a silencer for use in a ventilation duct system, has a perforated inner tube, an outer casing which is arranged at a distance from the inner tube and encloses the same, and a tubular, sound-absorbing element which is arranged between the inner tube and the casing. The tubular element has an increasing density radially outwards from the center axis of the inner tube. The silencer is produced by the sound-absorbing element being arranged on the inner tube, and the inner tube with the sound-absorbing element arranged thereon being enclosed in the surrounding outer casing.
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