Invention Grant
- Patent Title: Fibre reinforced polymer tube
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Application No.: US17055259Application Date: 2019-07-03
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Publication No.: US11976763B2Publication Date: 2024-05-07
- Inventor: Anders C Johansson , Magnus U. Henriksson , Anders Holmberg
- Applicant: HITACHI ENERGY SWITZERLAND AG
- Applicant Address: CH Baden
- Assignee: HITACHI ENERGY LTD
- Current Assignee: HITACHI ENERGY LTD
- Current Assignee Address: CH Zürich
- Agency: Sage Patent Group
- Priority: EP 181594 2018.07.04
- International Application: PCT/EP2019/067861 2019.07.03
- International Announcement: WO2020/007919A 2020.01.09
- Date entered country: 2020-11-13
- Main IPC: F16L47/16
- IPC: F16L47/16 ; B29C70/30 ; F16L9/12 ; B29L23/00 ; B29C53/56 ; B29C70/54

Abstract:
The present disclosure relates to a fibre reinforced polymer (FRP) tube, the tube comprising a plurality of concentric layers of an FRP material forming a shell of the tube. At least one blind threaded longitudinal bolt hole is provided from a transverse end surface of the shell. The bolt hole extends in at least three of the plurality of layers, a middle layer encompassing a plane passing through a center of the bolt hole, an inner layer encompassing a plane of an innermost extent of the bolt hole, and an outer layer encompassing a plane of an outermost extent of the bolt hole. The fibre filament of each of the inner and outer layers has been wound at a first angle to the longitudinal axis and the fibre filament of the middle layer has been wound at a second angle to the longitudinal axis.
Public/Granted literature
- US20210199224A1 FIBRE REINFORCED POLYMER TUBE Public/Granted day:2021-07-01
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