Safety timer for turbine powered helicopter
US4738098A · kind A · utility
Inventor
Key dates
| Filing date | Mar 26, 1987 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Mar 26, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D21/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A timing device to automatically timing the turbine engine cool-down period for a turbine engine helicopter. The electronic timer is activated when the micro-switch on the engine throttle cable is closed, as the pilot twists the throttle control to the ground-idle position. The timer illuminates a yellow caution light on the helicopter instrument panel to indicate to the pilot that the cooling cycle is in progress. The timer is preset to the specified time limits required by the turbine engine manufacturer for the helicopter. At the end of the cool-down period, the timer deactivates the caution light on the helicopter instrument panel and indicates to the pilot that the cooling cycle is complete and the turbine engine can be shut down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.