Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle
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United States of America Patent
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Jul 31, 2007
Grant Date -
Dec 30, 2004
app pub date -
Sep 11, 2002
filing date -
Sep 12, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fluid guideline with at least two structural elements made of substantially soundproof material has at least one opening for sound damping. An impedance change (in particular in the form of an impedance discontinuity) of the flow resistance of the fluid flowing through the fluid guideline is present between two adjacent structural elements, and the at least one opening is arranged in the region of the impedance change between two adjacent structural elements.
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