Elevator landing door lock safety system
US10889466B2 · kind B2 · utility
0Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 24, 2018 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Aug 1, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Access prevention systems of elevator landing door locks including a landing door lintel for a landing door of an elevator system, a lock mechanism mounted to the lintel and arranged to enable unlocking of the elevator landing door, and an indicator feature on the lintel and aligned with the lock mechanism to indicate a location of a blocked locking mechanism, wherein the indicator feature is at least one of frangible or breakable to permit access to the lock mechanism when the indicator feature is broken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.