Device for detecting an obstacle and limiting the force of an apron in a goods-handling door
US7762304B2 · kind B2 · utility
16Cited by
25References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Sep 30, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/88
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a device for detecting an obstacle and limiting the force from the primary edge or sill nosing (10) of a flexible apron or curtain (5) in a goods-handling door (1) when the latter comes into contact with an obstacle (14) as it is being closed. The inventive device comprises safety cells (21, 22) which are positioned and fixed close to each guiding device (8) such as to emit a beam F that is directed along a vertical axis outside of the guide (15) so that the beam is interrupted upon deformation of the flexible curtain or apron (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.