Electro-hydraulic pressure control fan drive system with electrical failure mode operation
US8607745B2 · kind B2 · utility
0Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2009 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Jul 12, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2031/36
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fan drive system is provided that is hydraulically controlled having an electrical failure mode wherein midrange operation of the fan drive system is maintained. Accordingly, in the failure mode, a fan drive system hydraulic relief valve is not closed thereby ensuring a degree of operation of the fan drive system even during periods of electrical failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.