Mechanism for detecting an obstacle preventing the proper operation of a roller-type door with sectional shutters
US5706875A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/88
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mechanism for detecting an obstacle preventing the proper operation of a sectional shutter of a warehouse-type door which includes a detection member mounted in the vicinity of a horizontal shaft around which the sectional shutter is wound by the operation of a motor. The detection mechanism is connected to a switch for controlling the motor and thus the rotation of the horizontal shaft about which the sectional shutter is wound. The detection member consists of at least one member which extends adjacent to but spaced from the horizontal shaft and which is engageable by a slack portion of the sectional shutter caused by the engagement of an obstacle with the sectional shutter as it is being lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.