Deep-V tunnel stern boat
US3937173A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Sep 11, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H5/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A deep-V tunnel stern boat has the forward portion of the tunnel shaped for uniformly distributing the resurgent flow across the width of the tunnel and for smoothly forming the entrance curve to the tunnel to optimize a suction tending to lift the water into the tunnel. This is done by recessing port and starboard halves of the tunnel into the sides of the hull bottom so the tops of the tunnel halves are approximately parallel with the sides of the hull bottom at the deep-V angle and meet at an obtuse angle above the keel line. The tops of the tunnel halves are gradually shaped into a semi-cylinder around the upper half of the propeller, the tunnel sides are flared outward aft of the propeller, and exhaust ports are located in the flared tunnel sides. Such tunnels are also adapted for twin tunnel stern boats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.