Suction apparatus with noise reduction means

Details Suction apparatus with noise reduction means Suction apparatus with noise reduction means

2008-03-04

2008-03-04

Martin, Edgardo San (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S231000, C181S250000, C181S266000, C181S273000, C181S276000

Reexamination Certificate

active

10333041

ABSTRACT:
A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth extending substantially perpendicularly to the general direction of the noise in the passage.

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