发明名称 Riser extension and cover
摘要 An access device for a tank or other similar device or area to be accessed that is underground, includes a riser extension and an access cover. The riser extension is preferably slightly larger in diameter then the underground area to be accessed. The access cover fits around or in the riser extension and is recessed slightly below the ground level, allowing loam, grass and other ground material to be placed inside and on top of the access cover in the recessed area. When it is necessary to access the tank cover or other area to be accessed, lifting devices such as hooks or loops are utilized to remove the access cover, including any grass, loam, etc. located in the cover. When access to the desired area is complete, the access cover, including the grass and loam, is placed back over the riser extension.
申请公布号 US2007157526(A1) 申请公布日期 2007.07.12
申请号 US20060327105 申请日期 2006.01.06
申请人 SELL THOMAS 发明人 SELL THOMAS
分类号 E02D29/14 主分类号 E02D29/14
代理机构 代理人
主权项
地址
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