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公开(公告)号：US3930324A
公开(公告)日：1976-01-06
申请号：US467481
申请日：1974-05-06
CPC分类号： E02F3/8825 , E02F3/905 , E02F3/907 , E02F3/9231 , E02F7/06 , E02F9/24
摘要： A mechanical hole digging machine comprising a rotary cutting tool and a suction tube having an inlet opening adjacent to the cutting tool, a suction device for applying suction to the tube remote from the inlet opening to cause material cut away by the cutting tool to be sucked inwards through the inlet opening, the cutting tool and part at least of the suction tube being carried on a mounting by which they are movable upwards and downwards. An electromagnetic metal detector comprising three coils is mounted near the cutter head and adapted in use to give an indication of the presence of buried metal service pipe during a hole digging operation.
摘要翻译： 一种机械孔挖掘机，包括旋转切割工具和具有与切割工具相邻的入口的抽吸管，用于向远离入口开口的管提供吸力的抽吸装置，以引起切割工具被切割的材料被吸入 向内通过入口开口，切割工具和至少吸入管的部分被承载在它们可上下移动的安装件上。 包括三个线圈的电磁金属检测器安装在切割头附近，并适于在钻孔操作期间给出埋藏金属管道的存在的指示。
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公开(公告)号：US4089351A
公开(公告)日：1978-05-16
申请号：US663581
申请日：1976-03-05
摘要： A flexible metal hose unit comprising in combination: a spigot formed with an annular flange and an annular gripping area, both coaxial with the spigot axis, a corrugated or helical flexible inner metal tube fitting over the spigot and welded to said flange, one or more flexible sheaths fitted over said gripping area, a ferrule comprising an annular member fitted over said sheath or sheaths and crimped or swaged onto the sheath or sheaths in an area radially corresponding to said gripping area.
摘要翻译： 一种柔性金属软管单元，其组合包括：形成有环形凸缘的插口和与插口轴线同轴的环形夹持区域，配合在插口上并焊接到所述凸缘上的波纹状或螺旋形的柔性内金属管，一个或多个 柔性护套安装在所述抓握区域上，套圈包括安装在所述护套或护套上的环形构件，并且在径向对应于所述抓握区域的区域中压接或挤压到护套或护套上。
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