Control agent delivery system

• US 6,675,789 B2
• Filed: 08/15/2001
• Issued: 01/13/2004
• Est. Priority Date: 12/09/1999
• Status: Active Grant

• Current Assignee: NCH Corporation
• Original Assignee: NCH Corporation
• Inventors: Pearce, Robert Clarence III, Kiplinger, Dale Vilmer
• Primary Examiner(s): Jordan, Charles T.
• Assistant Examiner(s): Zerr, John W.
• Application Number:
  US09/930,661
• Publication Number:
  US 20010054367A1
• Time in Patent Office: 881 Days
• Field of Search: 102/502, 102/512, 102/513, 102/370, 431/321, 124/56
• US Class Current: 124/56
• CPC Class Codes: F42B 12/50 by dispersion

Abstract

A control agent delivery system useful for dispersing a pesticide, herbicide, fungicide or other biocide around a target or target area that is not directly accessible or that is hazardous to the user. The system includes a separable, two-part projectile containing a control agent disposed in a powder, liquid or gel dispersal medium, together with a gas-propelled, projectile launching device. A method of use of the subject system that causes the projectile to perform differently, depending upon the manner of launch, is also disclosed.

Claims

1. A control agent delivery system comprising a projectile and a projectile launching device, the projectile launching device comprising a pressurized gas source communicating with a tubular barrel and the projectile comprising slidably engageable body and cap members made of a destructively deformable material, the body and cap members each further comprising an elongated, substantially cylindrical sidewall section having one closed, convex end and one open end, the open end of the body member being insertable inwardly of and in frictional engagement with the open end of the cap member, the projectile containing a control agent selected from the group consisting of pesticides, herbicides and fungicides in at least one of a liquid, gel or powder form, the projectile being selectively positionable inside the projectile launching device with the closed end of the cap member facing forwardly for treating a proximal area target or with the closed end of the body member facing forwardly for treating a distal target.

2. The control agent delivery system of claim 1 wherein the destructively deformable material is gelatin having a moisture content ranging from about 5 to about 20 weight percent moisture.

3. The control agent delivery system of claim 2 wherein the destructively deformable material is gelatin having a moisture content ranging from about 5 to about 15 weight percent.

4. The control agent delivery system of claim 1 wherein the destructively deformable material is gelatin having a moisture content of about 10 percent.

5. The control agent delivery system of claim 1 wherein the body and cap members are each made of grafted starch.

6. The control agent delivery system of claim 1 wherein the body and cap members are each made of a flexible, polymeric material.

7. The control agent delivery system of claim 1 wherein at least one of the body and cap members further comprises a distinguishing indicia.

8. The control agent delivery system of claim 7 wherein the distinguishing indicia is a colorant.

9. The control agent delivery system of claim 1 wherein the pressurized gas source comprises compressed carbon dioxide.

10. The control agent delivery system of claim 1 wherein the pressurized gas source comprises compressed gas selected from the group consisting of air, nitrogen, carbon dioxide, and mixtures thereof.

11. The control agent delivery system of claim 1 wherein the projectile further comprises at least one of a filler material or diluent.

12. The control agent delivery system of claim 11 wherein the filler material is selected from the group consisting of diatomaceous earth, fumed silica, cornstarch and mixtures thereof.

13. The control agent delivery system of claim 1 wherein the control agent is a pesticide selected from the group consisting of pyrethrin, piperonyl butoxide, permethrin, chlorpyrifos, propoxur, bacillus thuringiensis, hydromethylnon and fipronil.

14. The control agent delivery system of claim 1 wherein the control agent is a herbicide selected from the group consisting of bromacil, dicamba and glyphosate.

15. The control agent delivery system of claim 1 wherein the control agent is a fungicide selected from the group consisting of benomyl, cyproconazole and imazalil.

16. The control agent delivery system of claim 1 wherein the projectile comprises at least one pesticide and at least one pest attractant.

17. The control agent delivery system of claim 16 wherein the pest attractant is a feeding attractant.

18. The control agent delivery system of claim 16 wherein the pest attractant is a pheromone.

19. The control agent delivery system of claim 1 wherein the projectile has a length-to-diameter ratio ranging between about 1.58 and about 1.94.

20. The control agent delivery system of claim 1 wherein the projectile has a filled weight greater than about 0.35 grams.

21. The control agent delivery system of claim 20 wherein the projectile has a filled weight ranging from about 0.5 to about 1.0 grams.