Safe efficient outboard motor assembly
US7445532B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2007 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Jun 29, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H20/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An outboard motor assembly for use as external propulsion for a watercraft includes a drive assembly, a shaft assembly, and an impeller-jet assembly coupled to the shaft assembly. The impeller-jet assembly includes an inlet stator, an exit stator, an 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 such that each blade is thicker at the trailing edge than at the leading edge, to create a circular array of separate nozzles with gaps between them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.