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US 5,690,519 AGranted
Underwater propulsive device
OwnerJohnson Cheninventor
Life of this patent
Estimating the term…
Abstract
A propulsive device includes an enclosed type housing for receiving a motor and a spindle. The housing has no openings for preventing water from entering into the housing. One or more magnets are secured to the spindle and rotated in concert with the spindle. A casing is secured to the housing for rotatably receiving a shaft. The shaft has a blade secured to one end and has one or more magnets secured to the other end for acting with the magnets secured to the spindle and for allowing the blade to be rotated by the motor via the magnets.
Claims1
A propulsive device comprising;
- an enclosed housing, said housing including at least two chambers having at least one gap formed therebetween,
- a motor disposed in said housing and including a spindle extending therefrom, said spindle and said motor being received in said housing, said spindle including at least two first magnets secured thereto and rotated in concert with said spindle and arranged in said chambers of said housing,
- a casing secured to said housing,
- a shaft rotatably supported in said casing, said shaft including a first end extending outwardly from said casing and having a blade member secured thereto and rotated in concert with said shaft, said shaft including a second end located adjacent to said spindle, and
- a barrel secured to said second end of said shaft and rotated in concert with said shaft, said barrel including at least one second magnet secured to said barrel and rotated in concert with said barrel and engaged in said gap of said housing,
- said first magnets acting on said second magnet for driving said barrel and said shaft to rotate said blade member when said first magnet is rotated by said motor.
3 more elements
Dependencies are inferred from the claim text.