Braking apparatus and method for a rail-bound carriage of an inclined or vertical elevator
US5487450A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Aug 23, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for braking a carriage which travels on rails of an inclined or vertical elevator. The elevator includes a cable driving device having cables connected to the carriage for moving the carriage along the rails. The carriage has a main frame assembly and a movable frame assembly, mounted to slide along the main frame assembly. The braking device comprises a cam disk assembly having eccentric disks rotatably mounted to the movable frame assembly and held in a first position at a predetermined distance away from a surface of each of the rails for frictionally engaging the rails when released from the first position. The cam disk assembly then causes a plurality of brake blocks of the brake device to engage frictionally the rails when the eccentric disks frictionally engage the rails. A first releasing device causes the eccentric disks to release from the first position and engage frictionally the rails when at least one of the cables breaks. Moreover, a second releasing device causes the eccentric disks to release from the first position and engage frictionally the rails when the carriage travels above a predetermined speed. Finally, at least one shock absorber d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.