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    EXCAVATOR AND METHOD FOR EXCAVATING SOIL
    73.
    发明公开
    EXCAVATOR AND METHOD FOR EXCAVATING SOIL 审中-公开

    公开(公告)号：EP4130404A1

    公开(公告)日：2023-02-08

    申请号：EP22186863.1

    申请日：2022-07-26

    申请人： Dredging International N.V.

    发明人： DONZE, Fabien Albrecht ,  LODEWYCKX, Thibo Marc

    IPC分类号： E02F9/26 ,  E02F9/24 ,  F41H11/22 ,  E02F3/407 ,  E02F3/92 ,  E02F3/43 ,  E02F7/06

    摘要： Described is an excavator for excavating soil in which a problematic object, such as unexploded ordnance, may be present. The excavator comprises an assembly of mutually pivotable arms which is connected to a chassis, and a pivotably arranged excavator bucket. At least parts of the excavator bucket and the outermost arm are embodied in a substantially non-magnetizable material. The excavator bucket further comprises a measuring device of magnetometers which are positioned at a mutual distance and which are configured to measure the local magnetic field vectors. The magnetometers are connected to a computer via a data and power cable with interposing of a data collection unit for collecting the magnetic field vector data measured by the magnetometers. The measuring device is further configured to determine the vector difference between said local magnetic field vectors, wherein a vector difference differing from zero indicates a disruption of the earth's magnetic field by the object, allowing the presence thereof to be detected.

    IMPROVEMENTS IN AND RELATING TO UNDERWATER EXCAVATION APPARATUS
    74.
    发明公开
    IMPROVEMENTS IN AND RELATING TO UNDERWATER EXCAVATION APPARATUS 审中-公开

    公开(公告)号：EP4036321A1

    公开(公告)日：2022-08-03

    申请号：EP22163599.8

    申请日：2017-08-23

    申请人： Rotech Group Limited

    发明人： STEWART, Kenneth Roderick ,  STEWART, Donald

    IPC分类号： E02F3/92

    摘要： There is disclosed an excavation apparatus (5), such as an underwater excavation apparatus, having means for producing, in use, at least one vortex, spiral or turbulent flow in a laminar flow of fluid, e.g. water. The excavation apparatus (5) comprises a rotor (10) having a rotor rotation axis (A), wherein, in use, flow of fluid passed or across the rotor (10) is at a first angle (α) from the axis of rotation (A). The excavation apparatus (5) comprises the rotor (5) and means or an arrangement for dampening reactive torque on the apparatus (5) caused by rotation of the rotor (10), in use. The turbulent flow is provided within, such as within a (transverse) cross-section, of the laminar flow.