Elevator emergency brake with shoes
US11230456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2018 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Oct 8, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2025/2081
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In one embodiment, a braking apparatus includes a pair of brake shoes, a cam follower connected to at least one of the shoes, a compressible spring connected to the cam follower, and an actuation assembly including a motor, a ball screw and an electromagnetic clutch. The braking apparatus is operative to transition from a brake applied position where the brake shoes are closed and a brake release position where the brake shoes are separated. When the braking apparatus is in the brake release position, a brake application may be commenced to close the shoes by power no longer being supplied to the electromagnetic clutch. Additionally, when the braking apparatus is undergoing a brake release cycle to separate the brake shoes, the brake application cycle may also be commenced prior to completion of the brake release cycle when power is no longer supplied to the electromagnetic clutch and the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.