发明授权
- 专利标题： Railroad spring frog assembly
- 专利标题（中）： 铁路青蛙组装
-
申请号： US848803申请日： 1997-05-01
-
公开(公告)号： US5810298A公开(公告)日： 1998-09-22
- 发明人: Keith Young , Stephen R. Kuhn
- 申请人： Keith Young , Stephen R. Kuhn
- 申请人地址： IL Chicago
- 专利权人： ABC Rail Products Corporation
- 当前专利权人： ABC Rail Products Corporation
- 当前专利权人地址： IL Chicago
- 主分类号： E01B7/14
- IPC分类号： E01B7/14
摘要：
An improved railroad trackwork spring wing frog assembly is provided with multiple rail-closer subassemblies, preferably of the nested and counter-wound compression spring-type, that co-operate with the assembly spring wing rail, and that are laterally spaced-apart with respect to each other along the angled rail portion of the frog assembly spring wing rail.
公开/授权文献
- US5245989A Apparatus for pain relief by controlled cranial pressure 公开/授权日：1993-09-21