Cleaner for a rotating screen on a harvester
US5466189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P11/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A self-cleaning device for filtering air in a harvester includes a venturi ejector connected to a source of pressurized air which, in a cotton harvester, includes the cotton handling system blower. The ejector includes nozzle, a vacuum chamber shaped to minimize dead air zones and eddy currents, and a diffuser section. The vacuum chamber is supported near a rotating air inlet screen to vacuum debris from the inlet side of the screen. The debris is drawn into the negative pressure air stream upstream of the nozzle and is positively directed away from the engine compartment and other components on the harvester. The engine cooling fan receives only screened air, and the use of a source of air which is independent of the cooling fan, as well as any separate screen cleaning fan, helps to retain maximum engine cooling capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.