Central system elevator
US4394900A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1981 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Jan 12, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G37/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A conveyor apparatus for moving materials unidirectionally has an elongated, upwardly facing trough with at least one longitudinally extending semicylindrical recess in the bottom thereof. A helical flight is positioned in each such recess and is rotated about its longitudinal axis so as to move said materials along said trough. At least one rigid, elongated push-bar is supported in the trough for reciprocal lengthwise movement longitudinally of the trough. Each push-bar has a plurality of longitudinally spaced barbs and/or plows mounted thereon and shaped to advance said materials unidirectionally where the push-bar is reciprocated. Material retaining elements may also be provided on the walls of the trough to oppose movement of the said material in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.