Composite sandwich structure with integrated reinforcement area and method of producing the same
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United States of America Patent
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Aug 13, 2013
Grant Date -
Sep 22, 2005
app pub date -
Mar 17, 2005
filing date -
Mar 17, 2004
priority date (Note) -
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Abstract
Producing a local reinforcement in a core structure of a composite sandwich structure involves forming a hole in a cover layer and the core of the sandwich structure, forming a hollow space in the core with a diameter the same as or preferably larger than that of the hole, introducing a spatial bounding device through the hole into the hollow space, seating the spatial bounding device in the hollow space to contact outwardly against parts of the core preferably by outwardly expanding the device, and introducing a filler material into the spatial bounding device. A sandwich structure includes a core between cover layers, and a local reinforcement including a hole in at least one of the cover layers, a space in the core with a larger diameter than the hole, a spiral sleeve in the space, and a filler material inside the spiral sleeve.
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