Patent US4237514A successfully refreshed from Google Patents.
US4237514A
Expired / Lapsed
US
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Lightning diverter strip
Assignee: Dayton Granger Inc
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Filing: 1978-12-01
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Granted: 1980-12-02
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Expires: 1998-12-01
Abstract
Abstract A lightning diverter strip for use on aircraft components has a polyester tape base onto which is bonded by an epoxy a coating or layer of uniformly dispersed powdered aluminum.
Inventors
- 👤 Jay D. Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
B; B64; B64D; B64D45/00; B64D45/02; H; H02; H02G; H02G13/00; H02G13/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A lightning diverter strip for conducting lightning-induced electrical currents and thereby protecting vulnerable aircraft components such as radomes and the like, comprising a substrate of flexible dielectric tape having a lower surface adapted to be applied to the aircraft component to be protected thereby, and having an upper surface, a flexible epoxy binder on said upper surface, a conductive metal powder of finely divided aluminum uniformly deposited along said tape and bound thereto by said binder, said powder having a density such as to provide a very high DC resistance which reads essentially as an open circuit to DC voltages while forming a discrete, non-destructive conductive path for electrical currents induced by lightning.
Claim 2
Dependent Claim
113 words
A lightning diverter strip for conducting lightning-induced electrical currents and thereby protecting vulnerable aircraft components such as radomes and the like, comprising a substrate of flexible dielectric tape having a lower surface adapted to be applied to the aircraft component to be protected thereby, and having an upper surface, a flexible epoxy binder on said upper surface, a conductive metal powder of finely divided aluminum uniformly deposited along said tape and bound thereto by said binder, said powder having a density such as to provide a very high DC resistance which reads essentially as an open circuit to DC voltages while forming a discrete, non-destructive conductive path for electrical currents induced by lightning.
Claim 3
Dependent Claim
47 words
The strip of claim 1 in which said aluminum powder is of a particle size of approximately 3 microns in diameter and deposited with a density of not substantially less than 100,000 particles per square centimeter and not substantially in excess of 300,000 particles per square centimeter.
Claim 4
Dependent Claim
14 words
The strip of claim 1 in which said tape is formed of polyethylene terephalate.
Claim 5
Independent Claim
87 words
The method of manufacturing a lightning diverter strip comprising the steps of (a) providing a length of thin dielectric plastic tape, (b) applying a curable epoxy to one surface of the tape, (c) uniformly applying finely divided aluminum powder to the epoxy with a density such as to provide a very high DC resistance which reads essentially as an open circuit to DC voltages while forming a discrete, non-destructive conductive path for lightning-induced currents, and (d) curing said epoxy to bind the aluminum particles to the tape.
Claim 6
Independent Claim
87 words
The method of manufacturing a lightning diverter strip comprising the steps of (a) providing a length of thin dielectric plastic tape, (b) applying a curable epoxy to one surface of the tape, (c) uniformly applying finely divided aluminum powder to the epoxy with a density such as to provide a very high DC resistance which reads essentially as an open circuit to DC voltages while forming a discrete, non-destructive conductive path for lightning-induced currents, and (d) curing said epoxy to bind the aluminum particles to the tape.
Claim 7
Dependent Claim
35 words
The method of claim 4 in which the aluminum powder has a particle size of approximately 13 microns and is deposited with a density which is not substantially less than 100,000 particles per square centimeter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |