Barrier with movable curtain
US6688374B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Nov 9, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/805
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A barrier includes a curtain vertically movable between a closed and open position. The curtain is interposed between right and left vertical tracks, which guide the curtain's movement. A drive unit raises and lowers a right edge of the curtain, while a clever strap system supports the curtain's left edge. The strap system includes a strap having one end fixed to an upper end of the left track and an opposite end fixed to a lower end of the right track. The strap runs across a leading edge of the curtain while passing across a left side roller and a right side roller mounted to opposite ends of the curtain's leading edge. The strap runs underneath the left roller to support the left side of the curtain. The strap runs across the top of the right roller to keep the strap from simply dropping out from underneath the left roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.