Marine propulsion – Jet drive – Having means to increase fluid drive means efficiency
Patent
1988-04-28
1989-06-13
Basinger, Sherman D.
Marine propulsion
Jet drive
Having means to increase fluid drive means efficiency
440 48, B63H 11103
Patent
active
048388190
ABSTRACT:
This marine propulsion unit has a main shaft for connection to a drive shaft, and a helical screw along the main shaft. A duct surrounds the main shaft and screw thereby creating a ducted area. The ducted area has a water inlet near its proximal end and a water outlet near its distal end, the ducted area being tapered from inlet to outlet, whereby water is accelerated through the ducted area to provide propulsion. A number of secondary inlet ports are disposed along and pass through the duct into the ducted area, for drawing in water to minimize cavitation along the ducted area. In an alternative embodiment, there is also a second duct coaxial with and surrounding the first duct, thereby creating a second ducted area. The second ducted area has a water inlet near its proximal end and a water outlet near its distal end, the ducted area being tapered from inlet to outlet. A second helical screw is provided along the first duct in the second ducted area, and the first duct is connected to the main shaft so that the first duct rotates with the main shaft. Additional secondary inlet ports are provided.
REFERENCES:
patent: 3011561 (1961-12-01), Wagener
patent: 3082732 (1963-03-01), Stallman
patent: 3087302 (1963-04-01), Brown
patent: 3678689 (1972-07-01), Ishiwata
patent: 3805731 (1974-04-01), Furst et al.
patent: 4631032 (1986-12-01), Nishida
patent: 4718870 (1988-01-01), Watts
Armstrong R. Craig
Avila Stephen P.
Basinger Sherman D.
LandOfFree
Marine propulsion unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Marine propulsion unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Marine propulsion unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1273818