发明名称 Movable mount concrete drill
摘要 A mechanical concrete drill system is provided which is capable of drilling holes in concrete curbs, walls, and the like, while being permanently mounted to a truck. A hydraulic lift system contained in the truck moves the drill system vertically, so that the drill can be operated in various vertical positions. The drill system is conveniently stored in the truck for movement to other drill sites.
申请公布号 US4813499(A) 申请公布日期 1989.03.21
申请号 US19880212920 申请日期 1988.06.20
申请人 MCNULTY, KENNETH 发明人 MCNULTY, KENNETH
分类号 E21B7/02;E21B19/083;(IPC1-7):E21B7/02 主分类号 E21B7/02
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