Combine cleaning system
US5176574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jun 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S460/902
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A combine cleaning system including a fan and a cleaning sieve which coact with each other to separate chaff and unthreshed tailings from grain. The sieve defines a grain cleaning area comprised of an air foil section extending rearwardly from a forward edge of the sieve and a slat or louvered section downstream of the air foil section. The air foil section provides a first level of cleaning to the threshed materials deposited on the grain cleaning area while the slat section provides a second level of cleaning to the material received thereon. Preferably, the air foil section comprises about 60% to about 85% of the grain cleaning area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.