Nonlinear and efficient eddy-current overspeed protection system for elevators
US11407614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2017 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Feb 3, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An overspeed emergency brake system includes an overspeed detector magnet generating a brake actuation force and a kinematic constraint element guiding the movement of the magnet. The magnet and a kinematic constraint element in the brake system are arranged such that a linear brake actuation force is generated at a normal operating speed condition (i.e in a first position of the magnet with respect to the kinematic constraint element), due to the movement of the kinematic constraint element when guiding the magnet along a reaction surface and the kinematic constraint element converts the linear speed-force relationship into a nonlinear speed-force relationship in an overspeed condition (i.e a second position), while the magnet translates with respect to the kinematic constraint element generating a sharply increasing force for triggering the overspeed emergency brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.