Curved escalator with fixed center constant radius path of travel
US4883160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1989 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Mar 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B21/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An escalator is provided with a curved path of travel from its entry to its exit landings. The path of travel of the escalator steps as seen in plan is a curve having a fixed center and a constant radius from landing to landing. In elevation, each landing portion will be disposed in vertically spaced horizontal planes, and there will be a medial constant slope ascending or descending portion. Interconnecting each landing portion with the constant slope portion will be entry and exit transitional curved portions of varying slope as seen in the elevational view. To enable the steps to traverse the curved path successfully, the effective length of the outer of the step chains is varied at different points along the path of travel of the escalator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.