发明授权
- 专利标题： Sound-damping mat, especially for a ballast bed
- 专利标题（中）： 隔音垫，特别适用于压载床
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申请号： US626322申请日： 1990-12-13
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公开(公告)号： US5060856A公开(公告)日： 1991-10-29
- 发明人: Hermann Ortwein
- 申请人： Hermann Ortwein
- 专利权人： Hermann Ortwein
- 当前专利权人： Hermann Ortwein
- 主分类号： E01B1/00
- IPC分类号： E01B1/00 ; E01B19/00
摘要：
The upper part of an elastomeric mat acting as a sound-damping element below a bed of ballast in a track support assembly is provided with a single layer of a knit, preferably a multiaxial warp knit fabric which, in part, protects the body of the mat against deterioration by penetration of the stones therethrough and provides high tensile strength in substantially all directions for the mat.
公开/授权文献
- US5694791A Apparatus for forming a jewelry item 公开/授权日：1997-12-09