Aeronautics and astronautics – Aircraft propulsion – Screw
Patent
1995-06-20
1998-09-22
Mojica, Vima Lissi
Aeronautics and astronautics
Aircraft propulsion
Screw
244 68, 244 69, 416176A, 440 67, B64C 1118, B64C 1146, B63H 126, B63H 508
Patent
active
058102884
ABSTRACT:
A propeller for fluid propulsion (such as air or water) comprises a pair of substantially rigid blades. The blades are mounted for rotation about respective, separate, parallel rotation axes, with the axes being also substantially parallel to the longest dimension of the blades. The blades each define a plate that is oppositely helically twisted along the longest blade dimension compared with the other blade. The blades are positioned together in synchronously opposite, rotatable condition, with the rotating blades passing by each other in closely spaced relation without physical contact. A tubular housing encloses the rotating blades in closely-spaced relation between the housing and blades. Such a blade system can provide a high velocity jet of large mass at relatively low rotational speed.
REFERENCES:
patent: 3425640 (1969-02-01), Kletschke et al.
patent: 3605672 (1971-09-01), Strumbos
patent: 5108275 (1992-04-01), Sager
patent: 5181868 (1993-01-01), Gabriel
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