Oar apparatus having a pivoting oar blade
US11472526B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 27, 2022 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H16/073
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An oar apparatus configured to remain submerged under water during the power stroke and the return stroke. The oar apparatus has a sheath and a shaft rotationally disposed within the sheath. An oar blade is affixed to the shaft, such that the oar blade is rotational relative to the sheath. The oar blade has a deployed orientation, in which the oar blade is substantially perpendicular to the movement direction of the vessel, and a feathered configuration, in which the oar blade is substantially parallel to the movement direction of the vessel. The oar blade is asymmetrical relative to the center axis of the shaft, such that resistance of the water exerted onto the oar blade creates a first moment urging the oar blade into the deployed orientation during the power stroke and a second moment urging the oar blade into the feathered orientation on the return stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.