Dose control apparatus for agricultural tube sprayers for spreading pesticides on fields and plants

Patent 5014914 Issued on May 14, 1991. Estimated Expiration Date:

September 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3853272

Farm chemical delivery system
Patent #: 4714196
Issued on: 12/22/1987
Inventor: McEachern , et al.

Method and an apparatus for spraying a liquid Patent #: 4721245
Issued on: 01/26/1988
Inventor: van Zweeden

Inventor

Wallenås, Anders

Application

No. 399456 filed on 09/26/1989

US Classes:

239/62, Having traversing motion responsive means239/142, WITH AGITATION OF SUPPLY MEANS239/156, Ground wheel operated discharge means or controller239/172, Vehicle drawn or carried239/405Fluid in outer of concentrically arranged paths is whirled

Examiners

Primary: Kashnikow, Andres
Assistant: Merritt, Karen B.

Attorney, Agent or Firm

Merchant & Gould

Foreign Patent References

0191287 EP. 08/13/1986
0201981 EP. 11/13/1986

International Class

A01M 007/00

Foreign Application Priority Data

1987-03-04 SE

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.