Elevator system hoistway access control
US11040853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2015 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Apr 26, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/288
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hoistway access system for an elevator includes an access switch positioned at a selected landing floor 34 of an elevator and operably connected to a controller 46. A remote controlled lock 48 is located at landing doors of a landing floor providing access to a hoistway pit 36, and is operably connected to the controller. A safety actuation system is operably connected to an elevator car and operably connected to the controller. The controller is configured to command a drive system to drive the elevator car to an upper location when the access switch is activated, to define a selected safety volume in the hoistway defined by the hoistway pit and the elevator car, command engagement of the safety actuation system to stop and hold the elevator car, and command the lock to unlock when the safety actuation system is engaged, thereby allowing access to the hoistway via the landing doors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.