Hollow plastic product having a sound attenuator
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United States of America Patent
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Mar 3, 1998
Grant Date -
N/A
app pub date -
Aug 23, 1995
filing date -
Aug 26, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A hollow plastic product having a sound/noise attenuating function is provided. The product includes a duct (1) defining a flow passage and extending over a length along a longitudinal axis, a resonator (1b) having an internal chamber (1b') and a connector (1c) which establishes a fluidic communication between the flow passage of duct (1) and the internal chamber (1b') of resonator (1b). The resonator (1b) serves to absorb or attenuate sound/noise created by the fluid flowing through the flow passage. The product is manufactured from the same parison at the same time and thus has a unitary structure. An improved method for manufacturing such a hollow plastic product is also provided.
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