Maryland's Defense Patent Database

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Waterjet propulsor with shaft fairing device

Patent image
NSWCCD

The invention is directed to a waterjet propulsor. The propulsor includes a structure covering an impeller shaft. The implementation of the elongated structure results in reduced drag, increased thrust and increased craft speed. The elongated structure may be a sleeve that is mounted in a free-floating arrangement over the impeller shaft that self-aligns, the sleeve having an airfoil cross section for optimizing the flow of water over the shaft. The elongated structure may also be a fixed housing arrangement that includes an airfoil cross section for optimizing the flow of water over the shaft.

Inventors: 
Sadowski, Thaddeus J.
Patent Number: 
Technical domain: 
Handling and Transportation
FIle Date: 
2013-06-18
Grant Date: 
2015-01-13
Grant time: 
574 days
Grant time percentile rank: 
10
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY