Brake release mechanism for motor operated roller blinds and shutters
US4850418A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/74
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for automatically releasing the braking mechanism of roller blinds or shutters or the like which are selectively operated by a motor drivingly connected to the drum of the blind wherein a drive shaft for the drum is prevented from rotating by gripping a brake disk between two rotating plates. Releasing of the brake is automatically effected as soon as the motor is activated by magnetic attraction of a yoke, which includes one of the rotating plates, against a spring element. In the event of an electrical failure, the brake may be released manually by mechanically urging the yoke from the brake disk against the action of the spring element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.