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. 28, 2001
Filed:
Jul. 13, 1999
Applicant:
Inventors:
Nicolas B. Paschke, Milwaukee, WI (US);
Thomas J. Boffeli, Dubuque, IA (US);
Assignee:
Rite-Hite Holding Corporation, Milwaukee, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
F24F 1/3072 ;
U.S. Cl.
CPC ...
F24F 1/3072 ;
Abstract
A flexible air duct is provided for conveying and distributing a source of forced air to a room or other area of a building. The air duct includes a flexible outer casing made of an air permeable fabric that evenly disperses the air into the room. To prevent the fabric from sagging when the source of forced air is periodically turned off, a support frame holds the casing in a generally open tubular shape even when the duct's interior and exterior air pressures are the same.