Fluid reaction surfaces (i.e. – impellers) – With means moving working fluid deflecting working member...
Patent
1976-08-02
1977-09-13
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With means moving working fluid deflecting working member...
416236A, B63H 128
Patent
active
040478351
ABSTRACT:
Conventional propeller blades, for use on water or aircraft, provided with a series of foldable fins on the rear surface of each propeller blade, a number of rows of fins being affixed along the length of each propeller blade and with each row of fins being tapered in height so as to be taller in height at the leading edge of each propeller blade and tapering to a small height at the trailing edge of each propeller blade, with the foldable fins projecting into a fully extended position when the propeller blades turn in a counter clockwise direction as when a vehicle is propelled forwardly and folding into a retracted position when the propeller blades turn in a clockwise direction as when a vessel is urged in a rearwardly direction. When a vessel is moved forwardly with the foldable fins in an extended position, the fins prevent the propellant medium, namely water or air from slipping along the length of the propeller blades and going off the ends. The fins direct the propellant rearwardly and thrust the vessel ahead, thereby significantly increasing the efficiency of a propeller.
REFERENCES:
patent: 1446011 (1923-02-01), Jackson
patent: 1537401 (1925-05-01), Blumschein
patent: 2099229 (1937-11-01), Possenheim
patent: 2359466 (1944-10-01), Currie
patent: 2498170 (1950-02-01), Meier
patent: 3275082 (1966-09-01), Stark
patent: 3294175 (1966-12-01), Bodner
patent: 3812812 (1974-05-01), Hurwitz
Gordon Marden S.
Powell Jr. Everette A.
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