发明名称 Method and apparatus for installation of underground ducts
摘要 A cyclic cable pulling machine includes a reaction plate having a flat front face, a frame secured to the reaction plate and a cable pulling mechanism including a hydraulic cylinder and a cable gripping mechanism, the cable gripping mechanism having jaws positioned to engage the cable during a pulling stroke, the hydraulic cylinder having an end abutting the reaction plate and an opposite end secured to the cable gripping mechanism for movement of the cable gripping mechanism away from the reaction plate during a pulling stroke and a powered clamping device attached to the frame which holds the cable during return movement of the cable pulling mechanism.
申请公布号 US2007048090(A1) 申请公布日期 2007.03.01
申请号 US20050216688 申请日期 2005.08.31
申请人 WENTWORTH STEVEN W;CRANE ROBERT F 发明人 WENTWORTH STEVEN W.;CRANE ROBERT F.
分类号 F16L1/00 主分类号 F16L1/00
代理机构 代理人
主权项
地址