Grain grader
US6253928A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a preferred embodiment of the invention, a grain grader has an improved cleaning system utilizing cascades of rollers swingably engaged with a grading cylinder. In a preferred embodiment, a multiple axle roller assembly for dislodging clogged grain in the apertures is suspended from above the cylinder with multiple the rollers swingable in a downward arc to engage the cylinder. Such roller assembly may include a lifting mechanism to raise and lower the assembly for selective engagement with the rotating trammel and to facilitate removal and insertion of cylinders. The roller assembly has a plurality of stages to effectively provide unclogging action without gaps across the entire width of the trammel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.