- 专利标题: Rail seat crown and concrete rail tie having the same
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申请号: US15459279申请日: 2017-03-15
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公开(公告)号: US10011954B1公开(公告)日: 2018-07-03
- 发明人: John K Martin
- 申请人: John K Martin
- 代理机构: Lewellyn Law, PLLC
- 代理商 Stephen Lewellyn
- 主分类号: E01B3/42
- IPC分类号: E01B3/42 ; E01B3/40 ; E01B9/04
摘要:
A concrete rail tie has an elongated tie body made of a first concrete material. The elongated tie body has an elongated top surface having a shaped profile. A preformed rail seat crown made of a second concrete material is embedded in the elongated tie body and disposed at a rail seat location of the elongated tie body. The preformed rail seat crown has top side flush with and shaped to match the shaped profile of the elongated top surface of the elongated tie body. And the second concrete material has a greater compressive strength and a greater flexural strength than the first concrete material.
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