Dose control apparatus for agricultural tube sprayers for spreading pesticides on fields and plants
US5014914A · kind A · utility
Inventor
Key dates
| Filing date | Sep 26, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Sep 26, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01M7/0089
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The apparatus comprises at least one pesticide container (16), and a dosage pump (18) for the container or the containers, respectively, or for each container this pump or each of the existing pumps comprising a step motor controlled precision pump of the radial type which is connected via a pressure and check valve (21) to a mixing chamber (22) to be connected to one or more nozzle ramps (14) and having an inlet for water, to which the pesticide is to be added. The dose control apparatus also comprises a control unit (35) for adjusting the pump flow or the pump flows, respectively, in dependence on definite parameters, the driving speed being one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.