Braking device for a door operator
US9731941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2010 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Jul 16, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A device for inhibiting the closing of a door that controls entry of an enclosure includes a first magnet disposed on a driven portion of the device and a second magnet disposed on a fixed portion of the enclosure. The first magnet and the second magnet are configured to be in register with each other as the door moves toward a closed position such that if the first magnet and the second magnet are in register with each other, a pole of the first magnet is in close proximity of a pole of the second magnet such that the first magnet and the second magnet react to each other to inhibit motion of the door towards the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.