Multiple auxiliary power unit system inlet ducts controlled by a single actuator
US7540142B2 · kind B2 · utility
18Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Aug 1, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0645
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An auxiliary power unit (APU) compartment air inlet system seals, via one or more inlet doors driven by a single actuator, an APU compartment, and isolates the APU inlet and cooling system inlets from each other. The system includes either one or two inlet doors, depending on the number of ram air inlets formed in the APU compartment. In either instance, however, a single actuator is used to move the inlet door(s) between open and closed positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.