IP Library Granted Patent US 7,093,787
Granted Patent B2
US 7,093,787 · App. 10/424,435 · Granted Aug 22, 2006

Lightning strike mitigation system

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Quick Facts
Patent No.
US 7,093,787
App. No.
10/424,435
Granted
Aug 22, 2006
Kind
B2
Abstract

A lightning strike mitigation system for protecting a surface includes an inner insulating layer adjacent a surface to be protected, an outer insulating layer, and an intermediate layer formed from an electrically conductive material between the inner and outer insulating layers. The inner and outer insulating layers may be formed from an ablative insulating material containing no metal fill, an ablative insulating material containing a 15% Ni fill, or an ablative insulating material containing a 30% Ni fill. The electrically conductive material may be a mesh material or a foil material formed from an electrically conductive material or materials.

Claims (13)

1. A lightning strike mitigation system for protecting a surface comprising an inner insulating layer adjacent a surface to be protected, an outer insulating layer, and an intermediate layer formed from an electrically conductive material between said inner and outer insulating layers and at least one of said inner and outer layers being formed from an ablative insulating material with a 15% Ni fill.

2. A lightning strike mitigation system according to claim 1 , wherein said electrically conductive layer comprises a mesh material formed from a copper material or an aluminum material.

3. A lightning strike mitigation system according to claim 1 , wherein said electrically conductive layer comprises a foil material formed from a copper material or an aluminum material.

4. A lightning strike mitigation system according to claim 1 , wherein said system has a thickness and said electrically conductive layer is located near a mid-point of said thickness.

5. A lightning strike mitigation system according to claim 1 , wherein said system has a thickness and said electrically conductive layer is located at a mid-point of said thickness.

6. A lightning strike mitigation system according to any one of claims 1 , 5 and further comprising at least one of said inner and outer layers being a multi-layer, non-homogeneous material of composite make-up.

7. A lightning strike mitigation system for protecting a surface comprising an inner insulating layer adjacent a surface to be protected, an outer insulating layer, and an intermediate layer formed from an electrically conductive material between said inner and outer insulating layers and at least one of said inner and outer layers being formed from an ablative insulating material with a 30% Ni fill.

8. A lightning strike mitigation system according to claim 7 , wherein said inner and outer layers are each formed from an ablative insulating material.

9. A lightning strike mitigation system according to claim 7 , wherein at least one of said inner and outer layers is formed from an ablative insulating material with no metal fill.

10. A lightning strike mitigation system according to claim 7 , wherein said electrically conductive layer comprises a mesh material formed from a copper material or an aluminum material.

11. A lightning strike mitigation system according to claim 7 , wherein said electrically conductive layer comprises a foil material formed from a copper material or an aluminum material.

12. A lightning strike mitigation system according to claim 7 , wherein said system has a thickness and said electrically conductive layer is located near a mid-point of said thickness.

13. A lightning strike mitigation system according to claim 7 , wherein said system has a thickness and said electrically conductive layer is located at a mid-point of said thickness.

Assignments (7)
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jul 28, 2023
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: AEROJET ROCKETDYNE, INC.
Reel/Frame 064424/0109 →
CHANGE OF NAME Recorded Jul 27, 2023
From: RAYTHEON TECHNOLOGIES CORPORATION
To: RTX CORPORATION
Reel/Frame 064714/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE AND REMOVE PATENT APPLICATION NUMBER 11886281 AND ADD PATENT APPLICATION NUMBER 14846874. TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED AT REEL: 054062 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF ADDRESS. Recorded Mar 4, 2021
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 055659/0001 →
CHANGE OF NAME Recorded Sep 4, 2020
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 054062/0001 →
LICENSE Recorded Aug 5, 2016
From: UNITED TECHNOLOGIES CORPORATION
To: AEROJET ROCKETDYNE, INC. (F/K/A AEROJET-GENERAL CORPORATION, SUCCESSOR OF RPW ACQUISITION LLC)
Reel/Frame 039595/0315 →
RELEASE OF SECURITY INTEREST Recorded Aug 5, 2016
From: U.S. BANK NATIONAL ASSOCIATION
To: AEROJET ROCKETDYNE OF DE, INC. (F/K/A PRATT & WHITNEY ROCKETDYNE, INC.)
Reel/Frame 039597/0890 →
NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Recorded Jun 17, 2016
From: AEROJET ROCKETDYNE, INC., SUCCESSOR-IN-INTEREST TO RPW ACQUISITION LLC
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 039197/0125 →