Roller conveyor
US5147024A · kind A · utility
Inventor
Key dates
| Filing date | Dec 24, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Dec 24, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G47/261
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
With the screw driven into the female-threaded hole which radially extends through the hollow roller and opens to the outer peripheral surface of the cylindrical portion forming a part of the sprocket, the hollow roller is coupled to the sprocket and functions as a drive roller adapted to rotate integrally therewith. When both female-threaded holes have no screw received therein, the hollow roller functions as a free roller which is rotatable with respect to the sprocket. With the screw driven into the female-threaded hole opening to the outer peripheral surface of the diameter-enlarged block which forms a part of the friction tube, the hollow roller is coupled to said friction tube and functions as a friction roller adapted, upon inhibition of its rotation, to stop rotation of the friction tube and to generate a slippage between the friction surface defined by the friction tube and the friction surface defined by the sprocket but, so long as being allowed to rotate, to rotate integrally with both the friction tube and the sprocket. In this manner, the hollow roller can be used as any one of these drive roller, free roller and friction roller merely by selectively driving or removi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.