Hangar door assembly
US4793398A · kind A · utility
3Cited by
17References
5Claims
0Family size
Inventors
Key dates
| Filing date | Jan 8, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Jan 8, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An articulating door is fixed to a torque tube through a plurality of structural tube elements and gussets. The torque tube is rotatably fixed to the building. A sprocket, which is engaged to the torque tube, is driven by an electric motor and gear reduction drive, and a chain reduction drive. An arm assembly and counterbalance element counterbalance the door as it moves between its open and closed positions. In its open position, the door remains folded exteriorly of the building.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.