Controllable pitch propeller with a fail safe increased pitch movement
US6340290B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2000 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Jun 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H3/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A controllable pitch propeller is provided with a blade that naturally tends to rotate in a direction toward maximum pitch as a result of the hydrodynamic forces on the blade. As a result, the blade will move toward a pitch position of increased pitch magnitude in the event that a control system failure occurs. If the blades of a propeller move naturally toward their maximum pitch position in the event of a hydraulic, mechanical, or electrical failure in the pitch control system, the propeller will be operable and will allow a marine vessel operator to navigate toward port even with a propeller pitch control system that has malfunctioned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.