Safety braking device for a unit moving along a surface, in particular for a lift car
US4095681A · kind A · utility
Inventor
Key dates
| Filing date | Feb 18, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Feb 18, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2129/043
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The safety braking device comprises a case for mounting on the unit and in which there is journalled a shaft carrying a drive wheel engaged with a surface along which surface the unit moves. Fixed brake discs prevented from rotating with respect to the case are interposed between movable discs mounted on the shaft to rotate with the shaft. Screws extend through the movable discs and each have a head at one end and a gear pinion screwthreadedly engaged on the opposite end of the screws for axially tightening the discs together. The gear pinions are meshed with a gear wheel fixed to a support member which is mounted on the shaft to be rotatable by the shaft through the effect of friction between the shaft and support member. A centrifugal element is movably mounted on the support member and is capable of encountering an abutment, fixed relative to the case, when the support member is rotated beyond a reference speed and thus causes the gear wheel to rotate the gear pinions and tighten the discs together and apply the brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.