发明授权
- 专利标题: Yieldable prop
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申请号: US10371377申请日: 2003-02-21
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公开(公告)号: US07334968B2公开(公告)日: 2008-02-26
- 发明人: John C. Stankus , John G. Oldsen , Demrey G. Brandon
- 申请人: John C. Stankus , John G. Oldsen , Demrey G. Brandon
- 申请人地址: US PA Pittsburgh
- 专利权人: Jennmar Corporation
- 当前专利权人: Jennmar Corporation
- 当前专利权人地址: US PA Pittsburgh
- 代理机构: The Webb Law Firm
- 主分类号: E21D15/14
- IPC分类号: E21D15/14
摘要:
A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, and at least one handle connected to the first hollow conduit and the clamp assembly. The prop further includes a bearing plate positioned at the first end of the yieldable prop, wherein the bearing plate is selected from a shape comprising planar and volcano.
公开/授权文献
- US20030161693A1 Yieldable prop 公开/授权日:2003-08-28
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