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公开(公告)号：US10883211B2
公开(公告)日：2021-01-05
申请号：US16066463
申请日：2016-12-30
发明人： Jin Ho Choi , Jin Hwe Kweon
IPC分类号： D05B65/00 , D05B47/04 , D05B1/02 , D05B65/02 , D05B27/00 , D05B3/12 , D05B39/00 , D05B69/08 , D05B85/10
摘要： The present invention relates to a structure for fastening composite structures, and more particularly, to a sewing machine for stitching composite materials which is capable of automatically and continuously stitching the composite structures by using a high-rigidity fiber in order to laminate and join the composite materials. The sewing machine for stitching composite materials according to the present invention automatically and continuously performs a stitching operation for joining composite materials by using a high-rigidity composite fiber for joining the composite materials, and as a result, it is possible to reduce process time for joining the composite materials and improve productivity.
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公开(公告)号：US11813834B2
公开(公告)日：2023-11-14
申请号：US16788346
申请日：2020-02-12
发明人： Jin Ho Choi , Jin Hwe Kweon
CPC分类号： B32B5/06 , B32B5/26 , B32B7/12 , B32B37/06 , C08J5/243 , D06M17/00 , B32B2038/008 , B32B2038/0072 , B32B2250/20 , B32B2260/021 , B32B2260/046 , B32B2262/106 , B32B2305/076 , D06M2101/40
摘要： The present invention relates to a fastening structure of a composite material structure, and more particularly, to a composite material stitching structure reinforced with z-direction fiber which improves strength in a lamination direction of a relatively weak composite material structure, for a composite material structure, in which composite materials are laminated and bonded.
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3.发明授权公开(公告)号：US11888226B2
公开(公告)日：2024-01-30
申请号：US17780557
申请日：2020-08-26
发明人： Young Woo Nam , Byeong Su Kwak , Jin Ho Choi , Jin Hwe Kweon
CPC分类号： H01Q17/008 , B32B3/12 , B32B5/02 , B32B5/26 , B32B7/12 , B64D7/00 , B32B2260/023 , B32B2260/046 , B32B2262/101 , B32B2262/12 , B32B2305/024 , B32B2307/206 , B32B2605/18
摘要： Various embodiments relate to an electromagnetic wave absorber having a honeycomb sandwich structure, which is capable of absorbing broadband electromagnetic waves using electromagnetic properties of a metal-coated dielectric fiber, may comprise: at least two honeycomb core layers in each of which hexagonal units formed of a material comprising the metal-coated dielectric fiber are continuously arranged; and skin layers which are disposed on top surfaces and bottom surfaces of the at least two honeycomb core layers and each include a bottom layer, a top layer, and an intermediate layer. Various other embodiments are possible.
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公开(公告)号：US11872781B2
公开(公告)日：2024-01-16
申请号：US17926035
申请日：2020-11-02
申请人： INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY , INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
发明人： Young Woo Nam , Gi Won Jeong , Jin Hwe Kweon , Jin Ho Choi , Joon hyung Shin , Bo Seong Kwon , Jong Gwan Yook , Yeong Hoon Noh
摘要： A method for repairing a damaged area of a stealth composite structure having a stealth function using a scarf patch includes the steps of diagnosing the damaged area; deriving a repair area including the diagnosed damaged area; processing the scarf patch according to the derived repair area; machining a patch hole according to the derived repair area to remove the damaged area; and coupling the scarf patch to the patch hole so that an inner wall of the patch hole and a side surface of the scarf patch face.
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