System for protecting a vehicle from a mine

• US 8,146,477 B2
• Filed: 05/14/2010
• Issued: 04/03/2012
• Est. Priority Date: 05/14/2010
• Status: Expired due to Fees

• Current Assignee: Force Protection Technologies, Inc. (General Dynamics Corporation)
• Original Assignee: Force Protection Technologies, Inc. (General Dynamics Corporation)
• Inventors: Joynt, Vernon P.
• Primary Examiner(s): Klein, Gabriel
• Application Number:
  US12/780,532
• Publication Number:
  US 20110277621A1
• Time in Patent Office: 690 Days
• Field of Search: 89/360.1, 89/360.7, 89/360.8, 89/360.9, 296/187.07, 296/187.08, 296/193.07, 102/402
• US Class Current: 89/36.08
• CPC Class Codes: F41H 7/042 Floors or base plates for increased land mine protection
• CPC Class Codes: Y10T 29/49716 Converting

Abstract

In one aspect, the present disclosure is directed to a system for protecting a vehicle from a mine. Upon detonation the mine may yield ejecta having an expected trajectory. The system has a first layer of material disposed outside of an underbody of a hull of the vehicle. The first layer includes a base disposed in a direction substantially parallel to the underbody and a protrusion that narrows as it extends away from the base in a direction opposing the expected ejecta trajectory. The system also has a second layer including a material having a shock wave transmission velocity that is higher than a shock wave transmission velocity of the material of the first layer. The system further has an exterior layer substantially covering the first and second layers, and the exterior layer has an exterior surface that faces away from the underbody and toward the expected ejecta trajectory.

Claims

1. A system for protecting a vehicle from a mine, the mine being located at or underneath the surface on which the vehicle is traveling, the mine upon detonation yielding ejecta having an expected vertically upward trajectory, and the vehicle having a hull with an underbody, the system comprising:

a first layer of material disposed outside of the underbody, the first layer of material including a base disposed in a direction substantially parallel to the underbody, and a protrusion that narrows in width as it extends away from the base in a direction opposing the expected trajectory of the ejecta, the protrusion narrowing to an apex;

a second layer including a material having a shock wave transmission velocity that is higher than a shock wave transmission velocity of the material of the first layer, the second layer covering at least a majority of the base of the first layer; and

an exterior layer covering at least a majority of the first and second layers, the exterior layer having an exterior surface that faces away from the underbody and toward the expected trajectory of the ejecta, wherein

at least a portion of the exterior layer forms an acute angle relative to the base of the first layer; and

a maximum of the width of the protrusion is smaller than a width of the base, the width of the base and the maximum width of the protrusion extending substantially parallel to the underbody.

2. The system of claim 1, wherein the protrusion is a “

V”

-shaped wedge extending longitudinally along the underbody.

3. The system of claim 1, wherein the first layer is solid.

4. The system of claim 1, wherein:

at least a majority of an interior surface of the exterior layer contacts at least a majority of an exterior surface of the second layer; and

at least a majority of an interior surface of the second layer contacts at least a majority of an exterior surface of the first layer.

5. The system of claim 1, wherein:

the exterior layer forms at least one apex;

the second layer forms an apex; and

at least a portion of the apex formed by the second layer is located between the apex of the protrusion of the first layer and the at least one apex formed by the exterior layer.

6. The system of claim 1, wherein the second layer material includes a liquid.

7. The system of claim 1, wherein the first layer material includes at least one of vermiculite-epoxy and diatomaceous earth.

8. The system of claim 1, wherein the second layer material includes at least one of water and glycerin.

9. The system of claim 1, wherein the second layer material includes a mixture of one of gelled liquids and thickened liquids.

10. The system of claim 1, wherein the second layer includes a plurality of solid elongated elements.

11. The system of claim 10, wherein the plurality of solid elongated elements extends from the apex of the protrusion of the first layer to portions of the base of the first layer disposed away from the protrusion.

12. The system of claim 11, wherein each solid elongated element is at an angle relative to the base of the first layer.

13. The system of claim 10, wherein the plurality of solid elongated elements include material selected from the group consisting of glass and ceramic.

14. The system of claim 1, wherein the exterior layer includes a plurality of exterior protrusions, each exterior protrusion narrowing in width as it extends away from the underbody in a direction opposing the expected trajectory of the ejecta, each exterior protrusion narrowing to an apex.

15. The system of claim 14, wherein a solid elongated element extends from an apex interior of each exterior protrusion of the exterior layer to a respective portion of the base disposed away from the protrusion.

16. The system of claim 15, wherein each solid elongated element is at an angle relative to the base of the first layer.

17. The system of claim 1, wherein the exterior layer is metal.

18. The system of claim 1, wherein the system is in form of a kit for retrofitting the vehicle.

19. A method for retrofitting an existing vehicle with a blast-resistant kit for protecting the existing vehicle from a mine, the mine being located at or underneath the surface on which the vehicle is traveling, the mine upon detonation yielding ejecta having an expected vertically upward trajectory, and the existing vehicle having a hull with an underbody, the method comprising:

providing a first layer of material outside of the underbody, the first layer of material including a base disposed in a direction substantially parallel to the underbody, and a protrusion that narrows in width as it extends away from the base in a direction opposing the expected trajectory of the ejecta, the protrusion narrowing to an apex, and the base having an exterior surface that faces away from the underbody and toward the expected trajectory of the ejecta, at least a portion of the base forming a sheet, the protrusion forming a wedge attached to a middle portion of the sheet;

providing an exterior layer away from the first layer to form a gap between an exterior surface of the base of the first layer and an interior surface of the exterior layer that faces toward the underbody,

wherein at least a portion of the exterior layer forms an acute angle relative to the base of the first layer, and the portion of the exterior layer extends from below the apex of the protrusion of the first layer to below portions of the base of the first layer that are disposed away from the protrusion; and

providing a second layer in the gap between the first layer and the exterior layer, the second layer including a material having a shock wave transmission velocity that is higher than a shock wave transmission velocity of the material of the first layer and covering at least a majority of the base of the first layer.

20. The method of claim 19, wherein providing the second layer further includes providing a plurality of solid elongated elements extending from the apex of the protrusion of the first layer to portions of the base of the first layer disposed away from the protrusion.

21. The method of claim 19, wherein providing the exterior layer further includes providing a plurality of exterior protrusions, each exterior protrusion narrowing in width as it extends away in a direction opposing the expected trajectory of the ejecta, each exterior protrusion narrowing to an apex.

22. The method of claim 21, wherein providing the exterior layer further includes providing one or more additional solid elongated elements, each additional solid elongated element extending from an apex interior of each exterior protrusion of the exterior layer to a respective portion of the base, the additional solid elongated elements angled relatively to the base of the first layer.

23. A system for protecting an armored vehicle from a mine, the mine being located at or underneath the surface on which the vehicle is traveling, the mine upon detonation yielding ejecta having an expected vertically upward trajectory, and the vehicle having a hull with an underbody, the system comprising:

a first layer of solid material disposed outside of the underbody, the first layer of solid material including a base disposed in a direction substantially parallel to the underbody, and a protrusion that narrows in width as it extends away from the base in a direction opposing the expected trajectory of the ejecta, the protrusion narrowing to an apex;

a second layer including a liquid mixture having a shock wave transmission velocity that is higher than a shock wave transmission velocity of the solid material of the first layer, the second layer covering at least a majority of the base of the first layer; and

an exterior metal layer covering at least a majority of the first and second layers, the exterior metal layer having an exterior surface that faces away from the underbody and toward the expected trajectory of the ejecta, wherein

the exterior metal layer extends at an angle, relative to the base of the first layer, from the apex of the protrusion of the first layer to portions of the base of the first layer that are disposed away from the protrusion; and

wherein the second layer further includes a plurality of solid elongated elements that extend from the apex of the protrusion of the first layer to portions of the base of the first layer disposed away from the protrusion.

24. The system of claim 23, wherein at least a portion of the base forms a sheet.