Filter housing

Details Filter housing Filter housing

2007-08-21

2007-08-21

Hopkins, Robert A. (Department: 1724)

Gas separation

With inflow gas control or distribution

C055S471000, C055SDIG030

Reexamination Certificate

active

10504057

ABSTRACT:
A filter housing includes an inlet for receiving airflow, a cavity for receiving a filter and an airflow passage between the inlet and the filter. At least one vane is positioned in the airflow passage for partitioning the airflow passage into a plurality of ducts. Each vane has a non-linear shape in the direction of flow through the airflow passage. This helps to reduce acoustic emissions from the machine since sound waves emitted by the fan and/or motor are caused to bounce off the vanes, which allows the vanes to absorb some of the sound energy. The filter housing can form part of a vacuum cleaner.

REFERENCES:
patent: 2607437 (1952-08-01), Crawford et al.
patent: 6712869 (2004-03-01), Cheng et al.
patent: 38 15 321 (1989-11-01), None
patent: 199 03 734 (2000-08-01), None
patent: 0 636 337 (1995-02-01), None
patent: S51-034572 (1976-03-01), None
patent: H02-128733 (1990-05-01), None
patent: 05 003843 (1993-01-01), None
Japanese Office Action mailed on Feb. 13, 2007 directed to counterpart foreign application.

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