Door system
US7810544B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jan 3, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/1716
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door system has an axis, a door attached at a first end to the axis for winding and unwinding upon the axis, and a tensioned member surrounding and partially engaging an outer layer of the door wound upon the axis. The tensioned member exerts a radial force to the outer layer of the door wound upon the axis, thereby ensuring that the door is consistently wound tightly upon the axis and permitting the fast unrolling of the door from the axis. Although the tensioned member exerts a radial force upon the door, it imparts no significant lateral forces to the door. Accordingly, the door can have a simple construction with material, cost and space savings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.