首页>
外国专利>
The borehole surface and the gripper and the well bore holes for pale green applications
The borehole surface and the gripper and the well bore holes for pale green applications
展开▼
机译:浅绿色应用的钻孔表面,夹具和井孔
展开▼
页面导航
摘要
著录项
相似文献
摘要
A drilling grab for pile foundations and well boreholes wherein the drilling grab comprises a grab body supporting circular grab spades which tilt from an open position to a closed position about pivot pins carried by the grab body. A radially projecting abutment interchangeably connected to the outer periphery of the grab body is engageable with the back of the grab spades when the same are in an open position. The abutment overlaps the periphery of the grab body and is characterized in that they consist of extension members adapted to grab spades of different sizes. The members are supported on radially projecting ribs located on the grab body.
展开▼