发明授权
- 专利标题: Portable earth boring machine
- 专利标题(中): 便携式镗孔机
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申请号: US592791申请日: 1975-07-02
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公开(公告)号: US4042043A公开(公告)日: 1977-08-16
- 发明人: William S. Appleman
- 申请人: William S. Appleman
- 申请人地址: OH Ashland
- 专利权人: The Richmond Manufacturing Company
- 当前专利权人: The Richmond Manufacturing Company
- 当前专利权人地址: OH Ashland
- 主分类号: E21B7/20
- IPC分类号: E21B7/20 ; E21B15/04 ; E21B19/086 ; E21B44/00 ; E21D9/02 ; E02D7/28
摘要:
A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by frame means adapted for movement along a track means, which frame means supports an engine which drives an earth boring auger as well as casing pusher apparatus for pushing casing sections into the earth fill as the boring operation progresses. The machine is further characterized by a fluid actuated pusher cylinder means for advancing the auger into the earth fill and associated automatic auger feed control means for automatically maintaining a constant fluid flow rate to said pushing cylinder means under variations in resistance to auger penetration of said earth fill during a boring operation.
公开/授权文献
- US5610933A Flashlamp-pumped Ho:Tm:Cr:LuAG laser 公开/授权日:1997-03-11