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:
May. 22, 1990
Filed:
Jan. 09, 1989
Michael C Coup, Wichita, KS (US);
Gary P Israel, Wichita, KS (US);
Glen W Ediger, Newton, KS (US);
Donald J Moore, Wichita, KS (US);
Vornado Air Circulation Systems, Inc., Wichita, KS (US);
Abstract
A ducted fan including a funnel-shaped duct positioned upstream of the impeller and connected to a base, an outer cowling concentrically positioned downstream and attached to said duct through a series of ribs, an inner cowling positioned inside the outer cowling and surrounding the impeller and a circular grill attached to the discharge end of the inner cowling. The grill including a center hub and a series of arcuate-shaped ribs extending outwardly from the hub and having a constant curvature of less diameter than the outside radius of the grill whereby the maximum lateral spacing between the ribs is at a radius inboard from the outside radius of the grill.