Balanced self adjustable escalator handrail drive
US5018616A · kind A · utility
5Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1990 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Nov 5, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B23/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The handrail drive utilizes one or more pairs of drive rollers which form a nip through which the handrail moves. The drive rollers are mounted on rotating drive shafts which in turn are eccentrically mounted in rotatable bearings. The drive rollers will automatically tighten on the handrail as friction increases between the rollers and handrail due to increased resistance to movement of the handrail. The rotatable bearings are connected together to ensure that each roller tightens equally on each side of the handrail so that the handrail is not bent through an S curve as it passes through the drive roller nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.