发明名称 Light weight underground pipe or cable installing device
摘要 This invention pertains to a light weight underground pipe or cable installing device adapted for use in a narrow and deep operating trench. More particularly this underground pipe installing device employs a pair of laterally movable gates positioned adjacent the bottom of the operating trench where the earth is more solid to securely clamp the device in the operating trench to enable it to withstand the forces exerted as the actuating rod is forced through the earth from the so-called operating trench to the target trench. To accommodate the laterally movable gates positioned adjacent the bottom of the narrow pipe installing device, a pair of top operated double-acting rod clamping jaws, operated by a hydraulic cylinder positioned above the actuating rod are employed.
申请公布号 US4492274(A) 申请公布日期 1985.01.08
申请号 US19820404390 申请日期 1982.08.02
申请人 ELEPHANT INDUSTRIES, INC. 发明人 SCHOSEK, WILLIAM O.
分类号 E21B7/04;F16L1/06;(IPC1-7):E21B7/26 主分类号 E21B7/04
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