Elevator brake
US6289727A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jul 28, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2066/005
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A torque-measuring device for an elevator brake measures the elastic deformation of active parts of a brake, for example, a shoe brake. In that case, regions with a reduced bending moment resistance are formed at the brake levers and elastically deform under the action of braking torque. The elastic deformation is detected by strain gauge strips arranged in these regions and connected as a measuring bridge and the generated voltage signals are provided to an elevator control as reference signals by an analog-to-digital converter and a microprocessor. The elevator control uses these reference signals to generate in a drive motor a motor torque compensating for the measured torque before the release of the brake. Thus, the resulting torque at the brake shaft is zero and a jerk-free start of the elevator car, without a torque jump, results therefrom after release of the brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.