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    Expansible mandrels for use in driving or withdrawing tubular piles
    2.
    发明授权
    Expansible mandrels for use in driving or withdrawing tubular piles 失效
    可用于驱动或取出管状桩的扩展人造船

    公开(公告)号：US3625013A

    公开(公告)日：1971-12-07

    申请号：US3625013D

    申请日：1970-06-16

    申请人： GUILD CHARLES L ,  WILLARD B GOODMAN

    发明人： GUILD CHARLES L ,  GOODMAN WILLARD B

    IPC分类号： E02D7/30

    CPC分类号： E02D7/30

    摘要： EXPANSIBLE MANDRELS ARE DISCLOSED FOR USE IN DRIVING OR WITHDRAWING TUBULAR PILES. THE MANDRELS COMPRISE SECTIONS INTERCONNECTED BY CABLES IN A MANNER SUCH THAT A PULL ON ONE CABLE EXPANDS THE MANDREL SO THAT IT WILL TIGHTLY GRIP THE PILE INTO WHICH IT HAS BEEN INSERTED AND A PULL ON THE OTHER CABLE DRAWS THE SECTIONS TOGETHER SO THAT THE MANDREL MAY BE INSERTED IN OR WITHDRAWN

    FROM THE PILE. IN ONE EMBODIMENT, A SINGLE ACTING RAM HOUSED WITHIN THE MANDREL CONTROLS THE EXPANSION CABLE WHILE IN ANOTHER EMBODIMENT OF THE INVENTION, A DOUBLE ACTING RAM IS USED SO THAT BOTH CABLES CAN BE ACTUATED THEREBY.