Elevator fixture magnetic slide latch and control box equipped therewith
US11136785B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2018 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Apr 5, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05B65/0089
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An elevator call box with internal, concealable latching mechanism comprises an internally disposed, cylindrical magnetic pin with a relatively low pull force that is slidably displaceable by an larger, external magnetic force supplied by a service technician. When the access door is closed, magnetic pin penetrates an orifice in a locking tab to lock the call box. The pin magnet is normally attracted to an adjacent, magnetically attractive clip snap-fitted to a latching block. The latch is externally disengaged via a stronger portable magnet carried by service personnel. The larger magnetic pull force of the portable magnet slidably displaces the smaller magnetic latch pin, freeing the locking tab to permit pivotal opening of the access door. Once the stronger magnet is moved away, the smaller magnetic pin, which is attracted magnetically to the clip, will return to it's rest position penetrating the locking tab and locking the control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.