发明名称 Utility cover system
摘要 A utility cover system for preventing water and silt leakage into a utility entrance within a road surface. The utility cover system includes an outer frame having an opening defined by an inner tapered edge, and a wedge cover having an outer tapered edge that fits within the opening of the outer frame. The outer frame preferably has an inner segment and an outer segment, wherein the outer segment is thinner than the inner segment.
申请公布号 US6994489(B1) 申请公布日期 2006.02.07
申请号 US20030460080 申请日期 2003.06.11
申请人 CORR ROBERT F 发明人 CORR ROBERT F.
分类号 E02D29/14 主分类号 E02D29/14
代理机构 代理人
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