Gravity operated cable brake for an elevator
US7287627B2 · kind B2 · utility
4Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Apr 5, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D5/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A cable brake has an electromagnet releasably retaining a mass that falls down guide rods under the effect of gravity and impacts a first arm of a trigger lever. Upon impact by the mass, the trigger lever rotates a second arm with a pawl to release a crossbar, whereupon pressure springs press a moveable brake plate against a cable strand to halt the cable strand. A return mechanism utilizes a screw and cooperating nut or a coupler to return the moveable brake plate and pre-stress the pressure springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.