Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and fluid sustained
Reexamination Certificate
2006-04-25
2006-04-25
Nguyen, Tran (Department: 2834)
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and fluid sustained
C244S012300, C244S02300R, C244S02300R, C417S356000, C417S423700, C310S114000, C310S156530, C310S156560
Reexamination Certificate
active
07032859
ABSTRACT:
A counter rotating ducted fan having a permanent magnet drive. comprising a ducted housing having an iron core stator and a pair of counter rotating propeller blades rotationally mounted on a propeller shaft positioned axially within the housing Each of the propeller blades includes a plurality of individual propeller blades of an even number. Permanent magnets are mounted in permanent magnet insertion holes located at the tip of each of the individual propeller blades. When excited by an electrical current a pair of excitation windings mounted within the iron core stator control the rotational speed and direction of the pair of counter rotating propeller blades.
REFERENCES:
patent: 2952422 (1960-09-01), Fletcher et al.
patent: 4553075 (1985-11-01), Brown et al.
patent: 5178344 (1993-01-01), Dlouhy
patent: 5419513 (1995-05-01), Flemming
patent: 5616974 (1997-04-01), Yamada
patent: 5653404 (1997-08-01), Ploshkin
patent: 5765776 (1998-06-01), Rogers et al.
patent: 6208054 (2001-03-01), Tajima et al.
patent: 6575402 (2003-06-01), Scott
patent: 6727620 (2004-04-01), White et al.
patent: 6809456 (2004-10-01), Yun
patent: 2004/0042916 (2004-03-01), Masterton
patent: 2004/0061022 (2004-04-01), Paul
patent: 2005/0067908 (2005-03-01), Nai et al.
patent: 2005/0147501 (2005-07-01), Cheng et al.
Rick Noling, “The Case For Electric Motors”, Journal, Jul./Aug. 2004, pp. 20-23, vol. 22 #4, Publisher: AUVSI for the Unmanned Systems Industry, Arlington, Virginia.
Kalmbaugh David S.
Nguyen Tran
The United States of America as represented by the Secretary of
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