Cable brake for an elevator
US7543690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 15, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D5/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A cable brake has an electromagnet for selectively releasing a mass to fall down guide rods under the effect of gravity and impact a trigger lever to release a crossbar from a pawl, whereupon pressure springs move a brake plate against a cable strand to halt the cable strand. The pressure springs extend between a first pressure plate at the brake plate and a spaced second pressure plate that can be displaced along a path by a cooperating screw and nut to pre-stress the pressure springs. The pressure springs are relaxed in one end position of the path whereby the crossbar connected to the first pressure plate by a release bar is engaged by the pawl in a starting position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.