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:
Apr. 20, 1976
Filed:
Nov. 14, 1974
Applicant:
Inventor:
Wayne J Morrill, Fort Wayne, IN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
29190 ; 4162 / ; 416234 ; 416243 ;
Abstract
A one-piece blank for a propeller fan having a plurality of substantially identical blade portions extending outwardly from a central hub portion, each of the blade portions having leading and trailing edges which are joined at outer leading and trailing corners to an outer peripheral edge. The leading and trailing edges of adjacent leg portions define a narrow radially extending slot and the leading edges are shorter than the trailing edges. Each peripheral edge has a trailing portion extending from the trailing corner which is generally arcuate and a leading portion smoothly joined to the trailing portion and extending to the leading corner which generally follows an involute curve.