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. 26, 1993
Filed:
Nov. 21, 1991
Applicant:
Inventor:
Rudy S Chou, Liverpool, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
4162 / ; 4162 / ;
Abstract
An axial flow fan blade (11) having an enhanced tip (12, 12') to reduce or eliminate tip vortices and therefore vortex induced noise. The enhancement is a rounded body extending from the blade tip and having faired ends (15, 16) but otherwise a generally circular cross section. The body conforms to the contour of the tip and extends from the leading to the trailing edge of the blade. The body may have either a generally constant cross section (12) or a cross section that decreases from its leading to its trailing end (12' ).