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US 5,554,003 AGranted
Controllable pitch propeller for propulsor and hydroturbine
OwnerArnold M. Hallinventor
Life of this patent
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OwnerArnold M. Hallinventor
Estimating the term…
A controllable pitch propeller for application principally to sailboats employing electric auxiliary power. The design addresses a highly efficient approach to performing four basic functions desirable on sailing vessels that have electrical, or internal combustion, auxiliary power and onboard electrical systems typically employing batteries. The design employs no external nor remote actuator means; instead, blade position (nominal pitch) is inherently "controlled" by the direction of shaft rotation and whether the propeller is acting as a propulsor or a turbine. The four basic functions, or configurations, performed by the design are 1) forward propulsion, 2) reverse propulsion, 3) efficient power generation as a turbine, and 4) feathering for no-power minimum drag. The propeller includes a cambered blade configured with a cross section that would purposely act efficiently with fluid inflow impinging on either edge, depending upon the function being performed.
A fluid dynamic propeller device adapted to be mounted on a drive shaft for driving said drive shaft and for being driven by said drive shaft in a forward direction and a reverse direction, comprising:
A fluid dynamic propeller, comprising:
Dependencies are inferred from the claim text.