Base vented subcavitating marine propeller

Details Base vented subcavitating marine propeller Base vented subcavitating marine propeller

1990-04-10

1992-05-19

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Ambient fluid or exhaust gas directed through hub, fairing...

416243, B63H 128

Patent

active

051143135

ABSTRACT:
A propeller assembly for mounting on the drive shaft of a motorized water vehicle. The propeller consists of a central hub having a hollow body of circular cross-sectional shape through which exhaust gas from the motor can flow. Integrally formed with the hub are a number of arcuate blades. Each blade has a generally fish-shaped axial cross-sectional shape. In particular, from the leading edge of the blade, the cross-sectional shape increases in thickness until reaching a local maximum at a point near the midchord of the blade and thereafter decreases in thickness until reaching a local minimum. The blade thereafter again increases in thickness along concave surfaces until terminating in a concave trailing edge. The trailing edge of the blades are in communication with the exhaust gas flowing through the hub.

REFERENCES:
patent: 3109495 (1963-11-01), Lang
patent: 3306246 (1967-02-01), Reder
patent: 4417852 (1983-11-01), Costabile et al.
patent: 4789306 (1988-12-01), Vorus et al.
patent: 4790724 (1988-12-01), Bousquet et al.
patent: 4875829 (1989-10-01), Van der Woude

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