Step axle for escalator
US5219060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B23/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The step axle of an escalator is made with an inner, higher strength core piece and an outer, lower strength sleeve. The core is telescoped into the sleeve with opposite ends of the core projecting beyond corresponding outer ends of the sleeve. The step chains and step chain rollers are mounted on the harder outer ends of the core. The higher strength of the core prevents deformation of the composite axle from stresses imparted to the ends of the axle by the chains and rollers. The sleeve with its reinforcement of the core prevents the axle from bending in its center section when loads from the escalator steps are transmitted to the step axle from passengers on the escalator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.