Helicopter rotor speed changing transmission
US4783023A · kind A · utility
69Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Oct 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19126
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A helicopter has two engines adapted to drive a main sustaining rotor and a plurality of auxiliary propulsion means through a transmission system that is selectively operable to vary the relative speeds of rotation of the sustaining rotor and the auxiliary propulsion means depending upon operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.