Controllable pitch propeller arrangement
US5967749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jan 8, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H2023/005
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In the particular embodiments described in the specification, a controllable pitch propellor arrangement includes a plurality of propellor blades supported from a central hub which is rotatably mounted on a shaft in which each blade is pivotally supported from the central hub. Two radial pins extending from the outer ends of each of the blades are received in corresponding rims having peripherally disposed permanent magnet arrays. The rims are rotated to drive the propellor by energization of coils in a stator assembly surrounding the rims and the pitch of the blades is changed by changing the phase relationship of the current supplied to the stator coils to change the angular relation of the rims.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.