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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：US3947071A
公开(公告)日：1976-03-30
申请号：US477332
申请日：1974-06-07
CPC分类号： B65G53/4616 , B65G53/60
摘要： Apparatus for the collection and discharge of material in a pneumatic conveying system comprising a cylindrical chamber having an inlet at one end thereof through which entrained air and solid matter is ducted into the chamber, an outlet at the other end thereof through which the air from which the solid matter has been separated is exhausted, an opening in the base of the chamber through which the separated material can be discharged, and a shaft carrying vanes extending radially thereof along the chamber so as to divide it into a number of sealed compartments which are selectively charged and discharged of material as the vanes are rotated.
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