Self-correcting sensor for an entrance
US7178289B2 · kind B2 · utility
7Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2003 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Sep 12, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/6836
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A radiation transmitting or sensing element is placed in a generally elongated holder of resilient material so that, if it is distorted by an accidental impact or otherwise, it will automatically re-orient itself when the intruding force is released. The invention is especially useful in safety accessories for automatic overhead doors, garages, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.