发明名称 Underground conveyance protection device and method
摘要 Disclosed above are a device and method for protecting underground conveyances, wherein the device comprises a carrier containing fill material and, optionally, comprising a web material reinforcing the carrier. The device is oriented over an underground conveyance above a given amount of backfill so that it is detected and encountered by an excavator before the underground conveyance is damaged. In one embodiment, the device is preferably retrieved or brought to view when the webbing is snagged on the teeth of the excavating equipment.
申请公布号 US6702518(B2) 申请公布日期 2004.03.09
申请号 US20000752702 申请日期 2000.12.29
申请人 HARRIS MARK FROG 发明人 HARRIS MARK FROG
分类号 F16L1/11;(IPC1-7):F16L57/00 主分类号 F16L1/11
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