Wedge brake elevator safety system
US11639284B1 · kind B1 · utility
0Cited by
10References
8Claims
0Family size
Inventor
Key dates
| Filing date | Dec 8, 2021 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Dec 8, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vertical lift system having a safety brake assembly (10) employing a pair of brakes attached to cables running vertically on each side of a guiderail (1). Each brake has a series of wedges (13, 14, and 15), including a braking wedge (14) that presses against the guiderail to brake downward motion of an elevator or lift basket upon an interruption in cable tension. A cable tension adjustment mechanism (3, 4 and 6) to equalize tension in the cables is also incorporated into the safety brake assembly. An electrical sensor (18) is also provided to disrupt power to the lift system upon slackening of a cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.