Safety system and method for overhead roll-up doors
US11346141B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | May 7, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/6809
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An overhead roll-up door assembly having a door controller, a door panel and a drum on which the door panel is wound and unwound to open and close a doorway, opening and closing of the door being controlled by the controller. The door assembly includes a safety system comprising at least one light, the at least one light being positioned to emit light proximate a first side of the doorway, the light from the at least one light being projected onto a lower boundary of the doorway and forming a strip or stripe proximate the first side of the doorway, wherein emission of the light from the at least one light is controlled by the controller in conjunction with the controller opening and closing the doorway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.