Emergency stop device for elevators
US8869946B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2009 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An emergency stop device for elevators which actuates when an abnormal speed in both ascending and descending directions of a car is detected by one governor. The emergency stop device includes an endless governor rope to perform circulation movement in synchronization with ascent and descent of the car, a governor in an upper part of the shaft that restrains circulation movement of the governor rope when the abnormal speed is detected via the governor rope, an emergency stop device body in the car that brakes the car when the abnormal speed is detected, a swinging body swingably provided in the emergency stop device body, connected to the governor rope, that rotates when the circulation movement of the governor rope is restrained, thereby causing the emergency stop device body to actuate, and a swinging body rotation mechanism which rotates the swinging body in a prescribed direction when the governor rope between the car and the governor has become slack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.