Multifunction secondary power system starting method
US5408821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jun 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19014
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A multifunction secondary power system (10) for use aboard an aircraft or other vehicle provides the functions both of an auxiliary power unit and of an emergency power unit. The power system (10) includes two turbine engines (12, 22) operable under differing conditions, a gearbox (34) receiving power from the two engines (12, 22) selectively through overrunning clutches (74,84), and a plurality of accessory devices (36, 38, 40) receiving shaft power from either of the two engines (12, 22) through the gearbox (34). The gear box (34) includes a third clutch (64) operably interposed between the clutches (74, 84) which selectively delivers shaft power from the engine (22) to the engine (12) to affect the start thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.