System and method for safety management in roll-up doors
US11236540B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Apr 13, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/6836
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety curtain and system includes multiple light emitters and multiple light receivers to detect traffic approaching a doorway. The safety curtain my include pairs of multiple light emitters and receivers positioned on both sides of a passageway (doorway) so as to detect approaching traffic. The multiple light emitters and light receivers may detect a height of an approaching traffic (e.g., person or vehicle) and initiate warning lights of a possible door closing. The detected approach of traffic may cause the door to be stopped, reversed or slow down. The system may include a computer to monitor the signals from the receivers and may control the motion of the door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.