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:
Aug. 21, 2001
Filed:
Jul. 30, 1998
Yuan-Ming Tang, New Brighton, MN (US);
Ricardo Lira, Woodbury, MN (US);
Michael Harms, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
There is provided an air delivery device and method of moving and filtering air. The air delivery device comprises a housing having an air inlet and an air outlet. Between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving elements, the rotating air moving elements intersects the flow of air between the air inlet and the air outlet and establishes a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprises at lest one filter element, having at least one upstream filter face and at least one downstream filter face, defining at least one primary flow channel, and rotating along the same axis of rotation as the air moving elements and preferably forming the air moving elements at least in part. The upstream filter face moves into a portion of the airflow through the air delivery fan such that the upstream filter face impacts a portion of the moving airflow in a flow channel, permitting the air to flow through the filter element into the airflow of an further flow channel. The filter elements further define air flow passages or inlets allowing substantially unimpeded airflow to the primary flow channels and out to the air outlet. The air filter elements comprise an electret charged filter media.