发明申请
- 专利标题: Railroad Spikes and Methods of Making the Same
- 专利标题(中): 铁路尖峰和制造方法
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申请号: US14178873申请日: 2014-02-12
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公开(公告)号: US20140191053A1公开(公告)日: 2014-07-10
- 发明人: Hayden W. Newell
- 申请人: NORFOLK SOUTHERN CORPORATION
- 申请人地址: US VA Norfolk
- 专利权人: NORFOLK SOUTHERN CORPORATION
- 当前专利权人: NORFOLK SOUTHERN CORPORATION
- 当前专利权人地址: US VA Norfolk
- 主分类号: E01B9/06
- IPC分类号: E01B9/06
摘要:
Embodiments of the present invention are directed to improved designs of railroad spikes and improved methods of manufacturing the same. According to one exemplary embodiment, a method for manufacturing a railroad spike may comprise the steps of: preparing a metal blank having a substantially circular cross-section; subjecting the metal blank to at least one cold heading process and at least one cold extrusion process to form a railroad spike having (a) a circular head with a fillet at its bottom side that is angled to engage a railroad tie plate or rail base and (b) a non-threaded shank with a substantially square cross-section and a chiseled tip; and coating the railroad spike with an anti-corrosion material.
公开/授权文献
- US08875556B2 Railroad spikes and methods of making the same 公开/授权日:2014-11-04