Universal constant speed variable pitch boat propeller system
OwnerHenry A. Castleinventor
Life of this patent
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Abstract
An adjustable pitch boat propeller system adapted for mounting on a drive shaft of a marine drive unit of a boat. The propeller includes an hub that has been adapted for mounting over the drive shaft of the boat, the hub having an external surface and internal annular surface. An annular piston is mounted against the internal annular surface and connected to a plurality of blades which are pivotally connected to the external surface of the hub by way of a linkage that allows pivoting the plurality of blades in response to movements of the annular piston.
Claims20
An adjustable pitch boat propeller system adapted for mounting over a drive shaft of a marine drive unit, the propeller comprising:
- a hub, the hub adapted for mounting over the drive shaft of the marine drive unit, the hub having an external surface, an internal annular surface adapted for accepting the drive shaft therethrough and an annular piston housed within said external surface;
- a plurality of blades pivotally connected to said external surface of said hub;
- and
- a connecting means for pivoting said plurality of blades in response to movements of said piston.
An adjustable pitch boat propeller system adapted for mounting over a drive shaft of a marine drive unit of a boat, the propeller comprising:
- a hub, the hub adapted for mounting over the drive shaft of the boat, the hub having an external surface and internal annular surface adapted for accepting the drive shaft therethrough;
- an annular piston mounted against said internal annular surface;
- a plurality of blades pivotally connected to said external surface of said hub;
- and
- a connecting means for pivoting said plurality of blades in response to movements of said annular piston.
A method adjustable pitch boat propeller adapted for mounting over a drive shaft of a marine drive unit of a boat, the method comprising:
- providing a propeller comprising:
- a hub, the hub adapted for mounting over the drive shaft of the boat, the hub having an external surface, an internal annular surface adapted for accepting the drive shaft therethrough and an annular piston housed within said external surface, the annular piston also being adapted for accepting the drive shaft therethrough;
- a plurality of blades pivotally connected to said external surface of said hub;
- and
- a connecting means for pivoting said plurality of blades in response to movements of said piston;
- providing a desired amount of hydraulic pressure between the internal annular surface of said hub and said annular piston, so that the pitch is adjusted by moving the annular piston within the annular hub by varying the hydraulic pressure between the annular hub and the annular piston.
Dependencies are inferred from the claim text.