Marine propulsion – Screw propeller – Propeller arrangement
Patent
1983-02-22
1985-09-10
Basinger, Sherman D.
Marine propulsion
Screw propeller
Propeller arrangement
440 89, 416 93A, 416129, B63H 510
Patent
active
045403694
ABSTRACT:
A propeller assembly is usable in combination with a watercraft drive unit having a generally horizontal drive support tube fixed on the craft and a drive shaft projecting from the rear end of the support and rotatable about a drive axis. The drive assembly has a hub fixed on the shaft adjacent the support and having a front hub portion immediately behind the rear support end and a rear end spaced therefrom. A rear propeller is fixed to the rear portion of the hub so that it rotates therewith and with the shaft. A planet carrier defining a plurality of planet axes parallel to and spaced equiangularly about the drive axis is secured to the support so the planet axes are fixed relative to the support and drive axis. A sun gear fixed on the front portion of the hub within the planet axes meshes with respective planet gears rotatable on the carrier about the planet axes. A front propeller surrounds the planet gears, lies between the rear propeller and the rear support end, and is formed internally as a sun gear meshing with the planet gears. Thus rotation of the drive shaft in one direction rotates the rear propeller and sun gear in the same direction and rotates the planet gears and front propeller in the opposite direction.
REFERENCES:
patent: 1360037 (1920-11-01), Shonnard
patent: 1381939 (1921-06-01), Small
patent: 2672115 (1954-03-01), Conover
patent: 3467051 (1969-09-01), Shimanckas
Basinger Sherman D.
Striker Michael J.
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