Conveyor for raising and lowering articles
US5291987A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Mar 25, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G47/57
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A conveyor for raising or lowering articles thereon comprising a vertically disposed central column which is rotatable about a vertical axis and which has a plurality of radially spaced apart push bar assemblies mounted thereon. A spiral bed extends around the outer periphery of the rotating central column and is adapted to support the articles to be conveyed thereon. Each of the push bar assemblies has a freely movable endless chain provided thereon from which extend bars which rest upon the upper surface of the spiral bed and which move upwardly along the spiral bed as the central column is rotated in one direction and which move downwardly along the spiral bed when the central column is rotated in an opposite direction. Entry and exit conveyors are associated with the conveyor to supply articles to be conveyed thereto and for receiving the conveyed articles therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.