Safe efficient outboard motor assembly

Details Safe efficient outboard motor assembly Safe efficient outboard motor assembly

2007-09-04

2007-09-04

Avila, Stephen (Department: 3617)

Marine propulsion

Jet drive

Reexamination Certificate

active

11129113

ABSTRACT:
An outboard motor assembly for use as external propulsion for a watercraft includes a drive assembly, a shaft assembly, and a impeller-jet assembly coupled to the shaft assembly. The impeller-jet assembly includes an inlet stator, an exit stator, a impeller, and an external housing surrounding the stators and impeller. The inlet stator contains a plurality of blades, forcing the flow of water into an optimum direction for the impeller. The exit stator also contains a plurality of blades, which are configured to direct the flow from the impeller, removing the twist and resulting in a more efficient flow of water. The exit stator is tapered to create a more efficient flow of water. The center portion of the impeller contains a hub with an exhaust vent. In the alternative, a duct can be positioned adjacent to the outlet stator such that air is directed into the flow from the outlet.

REFERENCES:
patent: 4182118 (1980-01-01), Chronic
patent: 4789306 (1988-12-01), Vorus et al.
patent: 5769674 (1998-06-01), Stallman
patent: 6009822 (2000-01-01), Aron
patent: 6059618 (2000-05-01), Purnell et al.
patent: 2003/0036319 (2003-02-01), Burg

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