The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
Mar. 29, 1999
Applicant:
Inventor:
Mark S. Howie, Bristol, TN (US);
Assignee:
Electrolux LLC, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03C 3/011 ; B03C 3/30 ;
U.S. Cl.
CPC ...
B03C 3/011 ; B03C 3/30 ;
Abstract
A vacuum cleaner exhaust filter assembly includes a main HEPA exhaust filter, and an ion generation stage to add ions to the air. The ion generation stage preferably is a polypropylene mesh which generates ions through static electric interaction with the moving air as the result of friction. The exhaust filter assembly preferably also includes a pre-filter impregnated with carbon, preferably in the form of activated charcoal, to absorb odors from the exhaust air. The filter components, arranged in the preferred order, are the carbon pre-filter, the main HEPA exhaust filter, and the ion generation mesh.