Safety braking device for elevator
US6668985B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Sep 6, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D69/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A friction element for use in a safety braking device for braking elevators co-operating with at least one elevator guide rail. The friction element has at least one friction surface that can be pressed against the guide rail to decelerate the elevator. The friction element is formed of a fiber-reinforced, ceramic composite material, containing silicon carbide and carbon with carbon fibers as reinforcing components. Preferably, the composite material is formed by a matrix of silicon carbide and carbon and the reinforcing component are exclusively carbon fibers with a minimum length of 10 mm and the volume content of carbon fibers in the friction element being between 30% and 70%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.