Acoustic foam sound reducer for vacuum power unit

Details Acoustic foam sound reducer for vacuum power unit Acoustic foam sound reducer for vacuum power unit

2005-10-27

2008-10-14

San Martin, Edgardo (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S224000, C181S225000, C015S326000, C096S382000

Reexamination Certificate

active

07434657

ABSTRACT:
A power unit for an in-wall vacuum cleaning system has a first compartment which contains a motor for producing a vacuum at remote wand receptacles and a second compartment for separating and collecting the debris. An improved sound reducer is mounted in the motor compartment for reducing the sound level emitted by the motor and providing good cooling airflow for the motor. The sound reducer includes a disc-shaped base having a central opening for receiving a portion of the motor and a pair of partitions mounted on the base and forming a plurality of irregularly-shaped sound passages for breaking up the sound waves traveling therethrough. The base and partitions are formed of an acoustic foam which assist in absorbing the sound waves.

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