Braking device
US9120644B2 · kind B2 · utility
1Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2010 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jan 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A braking device for an elevator is disclosed. The device may include a motor, a braking system, a first switch, and a second switch. The motor may be capable of generating a counter-electromotive force. The braking system may move to a disengaged position upon being energized and may move to an engaged position upon being de-energized. The first and second switches may have an open state. In the open state, the switches electrically couple the motor to the braking system so that the counter-electromotive force of the motor may energize the braking system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.