Friction reducing ship and method for reducing frictional resistance
US6789491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Mar 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T70/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A friction reducing ship reduces frictional resistance between the external hull plate 1 and water W by ejecting air A from the external hull plate 1 into water W to generate micro-bubbles B on the surface of the external hull plate 1. A structural feature of the ship is that micro-bubbles B are generated by creating a negative pressure region in the water W admitted in the water intake opening 2a, disposed below the waterline WL in the bow section 1a, so as to eject atmospheric air above the water into the water to generate micro-bubbles B, and discharging the micro-bubbles B together with water to the water discharge opening 2b provided in the bottom section 1b.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.