Externally verifiable thermal compensation of cowl opening actuator
US11293463B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2019 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Nov 18, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/865
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A cowl door actuator is arranged between a head end and a rod end connected to a cowl door in an aircraft. The cowl door has a closed position and an open position, and the cowl door actuator includes a piston rod that is axially moveable between the head end and the rod end. The piston rod has an extended position in which the piston rod contacts the rod end to move the cowl door to the open position, and a retracted position in which the piston rod is axially spaced from the rod end. When the cowl door is in the closed position, the gap between the piston rod and the rod end enables an axial displacement of the piston rod toward the extended position during thermal expansion of fluid remaining in the actuator, such that the cowl door is maintained in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.