Methods for diverting lightning current from skin fasteners in composite, non-metallic structures
US9912137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2015 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Jun 16, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/40
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multilayer composite structure with integrated fastener-to-conductive layer surface lightning protection interconnection employs a conductive layer with an inner surface and a plurality of chamfered recesses forming countersinks in an outer surface. A carbon-fiber reinforced plastic (CFRP) composite layer is disposed on the inner surface of the conductive layer and conforms to the surface shape. A plurality of holes extend through the plurality of chamfered recesses in the conductive layer and the adjoining CFRP composite layer in a manner such that the conductive layer defines a countersink portion extending into the openings of the plurality of holes. The chamfered recesses in the conductive layer provides an electrically conductive surface area that contacts conductive countersunk fasteners installed within the plurality of holes to enable current sharing between groups of neighboring fasteners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.