Elevator safety apparatus
US5096020A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator safety apparatus is disclosed which is designed to be mounted on an elevator car, which car moves along guide rails; said apparatus comprising a frame, an area for wedge housings formed in the frame, and wedges placed in the wedge housings on each side of a guide rail; the wedges gripping the guide rail when the safety apparatus is activated, the wedges being placed relative to each other such that the wider end of one wedge points upwards while the wider end of the second wedge points downwards. To allow safety apparatus action in both an upward and downward direction, the apparatus is provided with an activating mechanism connected to and moving both wedges, and an overspeed governor, or the equivalent, for controlling the activating mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.