Multi-ratio rotorcraft drive system and a method of changing gear ratios thereof
US8449432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2012 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Mar 14, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64U10/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.