Secondary oil system
US4888947A · kind A · utility
28Cited by
11References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Oct 31, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N29/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A secondary oil system for a flight propulsion gas turbine engine becomes operative only when engine fuel pressure is normal and engine primary oil pressure is abnormally low. The secondary oil system includes an air circuit having a mist circuit portion, a pilot operated air valve which normally blocks the air circuit, and a pilot valve responsive to fuel pressure and primary oil pressure to actuate the air valve. When the air circuit is unblocked, air flow in the mist circuit portion aspirates oil from a reservoir tank which oil is dispersed as a mist directed at a bearing in the sump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.