Method for changing the pitch of a controllable pitch propeller during gear shifting operations
US6406259B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H2023/0258
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control method for controlling a controllable pitch propeller during gear shifting operations monitors the gear selector switch to determine a future or impending gear shifting operation, determines the current pitch setting of a controllable pitch propeller, saves the current pitch setting, moves the blades of the controllable pitch propeller to a minimal or zero pitch setting, implements the gear change operation, and then returns the blades of the controllable pitch propeller to the original setting or the current setting by minimizing the pitch of the blades of the controllable pitch propeller prior to the shifting operation, the impact shock load on the marine propulsion system can be decreased by minimizing the resistance to propeller hub rotation caused by the blades moving through the water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.