Linear explosive breaching apparatus and method

• US 8,006,621 B1
• Filed: 09/15/2008
• Issued: 08/30/2011
• Est. Priority Date: 02/07/2008
• Status: Active Grant

• Current Assignee: Christopher R. Cherry
• Original Assignee: Christopher R. Cherry
• Inventors: Cherry, Christopher R.
• Primary Examiner(s): Hayes; Bret
• Application Number:
  US12/210,976
• Time in Patent Office: 1,079 Days
• Field of Search: 102/305, 102/307, 102/308, 102/309, 102/310, 102/476, 89/11.4
• US Class Current: 102/476
• CPC Class Codes: B26F 3/04 Severing by squeezing B26F3/08 takes precedence
• CPC Class Codes: F42B 1/028 characterised by the form of the liner
• CPC Class Codes: F42D 1/02 Arranging blasting cartridges to form an assembly adaptation of blasting cartridges therefor F42B3/02
• CPC Class Codes: F42D 1/043 Connectors for detonating cords and ignition tubes, e.g. Nonel tubes mounting of detonators in blasting cartridges F42B3/26
• CPC Class Codes: F42D 1/06 Relative timing of multiple charges F42D1/043 and F42D1/055 take precedence
• CPC Class Codes: F42D 3/00 Particular applications of blasting techniques explosive welding B23K20/08; explosive bolts or actuators F42B3/006; explosive valves F16K13/06; cutting devices actuated by explosion B23D15/145; pyrotechnical actuators F15B15/19; switching devices actuated by explosion H01H39/00

Abstract

The present invention relates to methods and apparatuses for explosive breaching.

Claims

1. A system for explosive breaching of a target comprising:

a bar comprising;

a tamper mass comprising a flowable powder comprising spherical particles sufficiently small so that said tamper mass is dispersable into a fine spray;

a shaped plastic container for enclosing said tamper mass;

a shock spreader disposable on a target to be breached; and

an explosive mass comprising an explosive material;

said explosive mass disposed between and adjacent to said shaped plastic container and said shock spreader;

wherein said shaped plastic container is separate from said shock spreader.

2. The system of claim 1 wherein said bar comprises a width fittable on a door adjacent a door frame.

3. The system of claim 2 wherein said bar is configured to be attachable to the door between a door handle of the door and the adjacent door frame.

4. The system of claim 1 wherein a width of said bar is between approximately ⅜

inch and approximately two inches.

5. The system of claim 4 wherein said explosive mass of said bar comprises between approximately 2 grams and approximately 6 grams of explosive.

6. The system of claim 1 further comprising at least one detonator well disposed on said bar.

7. The system of claim 1 further comprising a connector for attaching said bar to the door.

8. The system of claim 7 wherein said connector comprises an adhesive.

9. The system of claim 7 wherein said connector comprises a magnet.

10. The system of claim 1 wherein said bar further comprises a connector between said shock spreader and said explosive mass.

11. The system of claim 1 wherein said bar further comprises a connector disposed between said explosive mass and said shaped plastic container.

12. The system of claim 1 wherein said bar comprises a length of between approximately 6″

and approximately 9″

.

13. The system of claim 12 wherein said bar is attachable to a door target between a door handle and an adjacent door frame.

14. The system of claim 12 wherein said explosive mass of said bar comprises between approximately 6 grams and approximately 18 grams of explosive.

15. The system of claim 1 comprising a second bar.

16. The system of claim 15 wherein said second bar is attachable to a door between a deadbolt of the door and an adjacent door frame.

17. The system of claim 15 further comprising a detonating cord connecting said bars.

18. The system of claim 1 wherein said bar comprises a length of between approximately 12 inches and approximately 15 inches.

19. The system of claim 18 wherein said explosive mass of said bar comprises between approximately 9 grams and approximately 26 grams of explosive.

20. The system of claim 1 wherein a detonator well is disposed perpendicular to said bar.

21. The system of claim 1 wherein a detonator well is disposed at an end of said bar.

22. The system of claim 1 wherein a detonator well is disposed in an interior of said bar.

23. The system of claim 1 further comprising a portion on an end of said bar liftable with respect to said bar, said portion for receiving one or more detonator cords.

24. The system of claim 1 wherein said explosive mass comprises a sheet explosive.

25. The system of claim 1 wherein said explosive mass comprises a detonating cord.

26. The system of claim 1 wherein said bar comprises at least two segments.

27. The system of claim 26 wherein said segments are foldable with respect to each other.

28. The system of claim 1 further comprising at least one detonator cord channel disposed through an interior of said bar.

29. The system of claim 28 comprising detonating cord disposed in said detonating cord channel.

30. The system of claim 1 wherein said bar comprises a length of between approximately 1.5′

and 15′

.

31. The system of claim 30 wherein said explosive mass of said bar comprises between approximately 8 grams and approximately 43 grams of explosive.

32. The system of claim 30 attachable to a door target at a hinge side of the door.

33. The system of claim 30 attachable on a length and a width of a door target.

34. The system of claim 1 attachable to a door target at an interior portion of the door.

35. The system of claim 1 not including a metal liner.

36. The system of claim 1 not including a hollow metal-lined cavity.

37. The system of claim 1 wherein said shock spreader and said shaped plastic container comprise different materials and/or thicknesses.

38. The system of claim 1 wherein said flowable powder is metallic.

39. A method for explosive breaching of a door, the method comprising:

disposing a bar comprising an explosive mass disposed between a shock spreader and a shaped plastic container containing a tamper mass comprising a flowable powder on a door between a door handle of the door and a door frame adjacent to the door, the bar oriented so that the shock spreader is facing the door; and

detonating the explosive mass to breach the door;

wherein the flowable powder comprises spherical particles sufficiently small so that the tamper mass is dispersable into a fine spray; and

wherein the shaped plastic container is separate from the shock spreader.

40. The method of claim 39 further comprising connecting the bar to the door.

41. The method of claim 40 wherein connecting comprises connecting with a magnet.

42. The method of claim 40 wherein connecting comprises connecting with an adhesive.

43. The method of claim 39 further comprising:

disposing the bar on the door between the door handle and the adjacent door frame;

disposing a second bar comprising a second explosive mass disposed between a second shock spreader and a second tamper mass on the door between a deadbolt key receptacle on the door and the door frame, the second bar oriented so that the second shock spreader is facing the door; and

detonating the explosive masses to breach the door.

44. The method of claim 43 wherein the detonating of the explosive masses in the bars occurs simultaneously.

45. The method of claim 43 wherein the detonating of the explosive masses in the bars occurs sequentially.

46. The method of claim 39 wherein the explosive mass comprises a sheet explosive.

47. The method of claim 39 wherein the explosive mass comprises a detonating cord.

48. The method of claim 39 not including a metal liner.

49. The method of claim 39 not including a hollow metal-lined cavity.

50. The method of claim 39 wherein the shock spreader and the shaped plastic container comprise different materials and/or thicknesses.

51. The method of claim 39 wherein the flowable powder is metallic.