Aircraft hangar door arrangement
US4971129A · kind A · utility
6Cited by
11References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B3/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hanger door arrangement which comprises a door having two upper door panels adapted to be pivotally connected to the top of the hanger door opening in side-by-side relationship and two lower door panels pivotally connected to the lower edges of the upper panels, and an operating mechanism which raises the door to an open position in which the lower panels allow passage of the wings of an aircraft beneath them and the tailgate between them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.