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Efficient Marine Jet Propulsion
 

U.S. Patent (Click for .pdf)
#7,241,193 B2
Variable Marine Jet Propulsion
Dated:  July 10, 2007


Virtual Reality Video


 

 
 


IntelliJET incorporates the following improvements over the 1st generation technology:

 
 
 

1. No reversing bucket


More compact system allows larger nozzle

Eliminates danger of reversing bucket to  
swimmers

Sliding fits on all moving parts

No pinch points

2. Continuously variable
maneuvering thrust

Continuous range of forward, neutral and reverse without stopping to shift (for example, driver can choose to be 40% in forward or reverse)

Instant response to driver input

Eliminates gear mashing and gear related repair bills

 
 
 
 

 

3. Continuously variable power transmission in forward mode

 

Provides more efficient engine operation
and better gas mileage

Increases thrust efficiency (lower RPM
produces higher thrust for a given power input)

Reduces vibration and noise

Smooth

 

 

Here is a recreational boat design
 incorporating the revolutionary IntelliJet propulsion system


View of boat from bottom


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Slider closed


Closed

The variable opening adjusts the speed of the water as comes onto the boat. 
 

 

Slider open


Open

 

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System fits neatly
 under swim platform


The pump and nozzle fit neatly under the swim platform,
 which is the ideal height found on popular wakeboard boats and ski boats.

   

Housing removed to show
vanes in forward position


Forward


A cutaway view shows the operation of the propeller to create forward thrust.


 

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Housing removed to show
variable impeller in neutral position

Neutral
 


The blades move to zero pitch for true neutral with no thrust in any direction. 


 

 

Housing removed to show
 blades in reverse position


Reverse


In reverse pitch the blades pump water backwards through the system

The inlet is reduced to become a nozzle for reverse thrust.
  Shifting between forward, neutral, and reverse is smooth and quick,
 because there are no gears to mesh. 


   
 

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