Airplane propeller blade with slotted flap

- The Ishida Foundation
Description

FIG. 1 is a rear perspective view of an airplane propeller blade with slotted flap showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a airplane propeller of four propeller blades with a slotted flap .

Referenced Cited
U.S. Patent Documents
D172121 May 1954 Apostolescu
D200986 April 1965 Wojciechowski
D252390 July 17, 1979 Voisard
1905891 April 1933 Blanchard
3461966 August 1969 Biermann
Patent History
Patent number: D344487
Type: Grant
Filed: Jul 7, 1992
Date of Patent: Feb 22, 1994
Assignee: The Ishida Foundation (Nagoya)
Inventor: Futoshi Iwamoto (Nagoya)
Primary Examiner: Kay H. Chin
Law Firm: Sughrue, Mion, Zinn, Macpeak & Seas
Application Number: 7/909,440
Classifications