Granted Patent B2

US 7,284,470 · App. 11/187,134 · Granted Oct 23, 2007

Abstract

Claims (28)

1. A projectile resistant device, comprising: a ceramic component;

at least a first component adhered to the ceramic component on at least one side thereof, the first component having a flexural modulus of at least 25 Msi, wherein the first component is adhered to a back surface of the ceramic component;

at least a second component adhered to a front surface of the ceramic component, the second component having a flexural modulus of at least 25 Msi; and

a backing component comprising a first backing layer which is adhered to a back surface of the first component, a second backing layer adhered to a back surface of the first backing layer, and a third backing layer adhered to a back surface of the second backing layer, each of the first backing layer and the third backing layer having a stiffness greater than the second backing layer, the second backing layer having greater energy absorption properties than each of the first backing layer and the third backing layer.

2. The projectile resistant device of claim 1 wherein the first component comprises woven carbon fabric adhered to a back surface of the ceramic component.

3. The projectile resistant device of claim 2 wherein the first component comprises at least a first, layer, a second layer and a third layer of a woven carbon fabric.

4. The projectile resistant device of claim 3 wherein the first layer is adhered to the back surface of the ceramic component, the second layer is adhered to a back surface of the first layer and a direction of a weave of the second layer is rotated to be of a different orientation than a direction of the weave of the first layer, and the third layer is adhered to a back surface of the second layer and a direction of a weave of the third layer is rotated to be of a different orientation than a direction of the weave of the second layer.

5. The projectile resistant device of claim 4 wherein the direction of the weave of the second layer is rotated approximately 30° about its axis in a first direction relative to the direction of the weave of the first layer and the direction of the weave of the third layer is rotated approximately 60° about its axis in the first direction relative to the direction of the weave of the first layer.

6. The projectile resistant device of claim 1 wherein the second component comprises woven carbon fabric.

7. The projectile resistant device of claim 6 wherein the first component comprises woven carbon fabric.

8. The projectile resistant device of claim 1 wherein the first backing layer comprises multiple laminated layers of a first grade of woven high molecular weight polyethylene fibers, the second backing layer comprises multiple laminated layers of a second grade of woven high molecular weight polyethylene fibers, and the third backing layer comprises multiple laminated layers of the first grade of woven high molecular weight polyethylene fibers.

9. The projectile resistant device of claim 1 further comprising a retention layer covering a front surface of the second component such that at least a portion of the retention layer extends around an edge of each of the second component, the ceramic component, the first component and the backing layer and is adhered to a back surface of the third backing component, the retention layer comprising a material having a tensile strength of at least 100 kpsi.

10. The projectile resistant device of claim 9 wherein the retention layer comprises a woven fiberglass material.

11. The projectile resistant device of claim 10 wherein the retention layer comprises a plurality of portions that extend around the edges of the second component, the ceramic component and the first component and are adhered to a back surface of the projectile resistant device.

12. The projectile resistant device of claim 9 wherein the retention layer comprises a woven fiberglass fabric.

13. The projectile resistant device of claim 9 wherein the retention layer comprises a plurality of portions that extends around the edges of the second component, the ceramic component, the first component and the backing component and are adhered to a back surface of the third backing layer.

14. The projectile resistant device of claim 9 further comprising a protective shell comprising a polymeric material, the protective shell having a front wall, the front surface of the retention layer being adhered to a back surface of the front wall, the protective shell further comprising side surfaces extending back from the front surface to encompass the edges of the retention layer, the first component, the ceramic component, the second component and the backing component.

15. The projectile resistant device of claim 1 further comprising a retention layer covering a front surface of the second component such that at least a portion of the retention layer extends around an edge of each of the second component, the ceramic component, the first component and the backing layer and is adhered to a back surface of the third backing component, the retention layer comprising a material having a tensile strength of at least 100 kpsi.

16. A ballistic resistant armor, comprising: a ceramic component;

a first component adhered to a back surface of the ceramic component, the first component comprising at least a first layer, a second layer and a third layer of a woven carbon fabric, each of the first layer, the second layer and the third layer of woven carbon fabric having a flexural modulus of at least 25 Msi, a direction of a weave of the second layer being rotated approximately 30° 0 about its axis in a first direction relative to a direction of the weave of the first layer and the direction of a weave of the third layer being rotated approximately 60° about its axis in the first direction relative to the direction of the weave of the first layer;

a second component adhered to a front surface of the ceramic component, the second component comprising a woven carbon fabric having a flexural modulus of at least 25 Msi;

a backing component comprising a first backing layer which is adhered to a rear surface of the first component, a second backing layer adhered to a back surface of the first backing layer, and a third backing layer adhered to a back surface of the second backing layer, each of the first backing layer and the third backing layer having a stiffness greater than the second backing layer, the second backing layer having greater energy adsorption properties than the first backing layer and the third backing layer;

a retention layer covering a front surface of the second component such that a plurality of portions of the retention layer extends around an edge of each of the second component, the ceramic component, the first component, and the backing component and are adhered to a back surface of the backing component, the retention layer comprising a woven fiberglass material having a tensile strength of at least 100 ksi; and

a protective shell comprising a polymeric material, the protective shell having a front wall, the front surface of the retention layer being adhered to a back surface of the front wall, the protective shell further comprising side surfaces extending back from the front surface to encompass the edges of the retention layer, the first component, the ceramic component, the second component and the backing component.

17. The ballistic resistant armor of claim 16 wherein the retention layer comprises a woven fiberglass material.

18. The ballistic resistant armor of claim 1 wherein the retention layer comprises a plurality of portions that extend around the edges of the second component, the ceramic component and the first component and are adhered to a back surface of the projectile resistant device.

19. The ballistic resistant armor of claim 16 wherein the first backing layer comprises multiple laminated layers of a first grade of woven high molecular weight polyethylene fibers, the second backing layer comprises multiple laminated layers of a second grade of woven high molecular weight polyethylene fibers, and the third backing layer comprises multiple laminated layers of the first grade of woven high molecular weight polyethylene fibers.

20. The ballistic resistant armor of claim 16 wherein the retention layer comprises a plurality of portions that extends around the edges of the second component, the ceramic component, the first component and the backing component and are adhered to a back surface of the third backing layer.

Assignments (8)