公开(公告)号：US07905679B2

公开(公告)日：2011-03-15

申请号：US11938444

申请日：2007-11-12

申请人： Kevin S. Vrondran ,  Jeremy I. Johnson ,  Andrew J. Malpass

发明人： Kevin S. Vrondran ,  Jeremy I. Johnson ,  Andrew J. Malpass

IPC分类号： E02D29/14

CPC分类号： E02D29/1445 ,  Y10T137/7021

摘要： A one-piece, unitary manhole cover has dual lifting ports that drain through the outer circumferential edge of the cover. A lifting channel runs from the interior of the upper face out to the outer circumferential edge. A lifting bar spans the lifting channel and defines an ergo lifting port and a pry bar lifting port. Both the ergo lifting port and the pry bar lifting port drain through the outer circumference of the manhole cover.

摘要翻译： 一体式整体式井盖具有通过盖的外圆周边缘排出的双提升口。 提升通道从上表面的内部延伸到外周缘。 提升杆跨越提升通道，并定义了一个ergo提升口和一个撬杆提升口。 ergo提升口和撬杆提升口都通过人孔盖的外围排出。

公开(公告)号：US20090123227A1

公开(公告)日：2009-05-14

申请号：US11938444

申请日：2007-11-12

申请人： Kevin S. Vrondran ,  Jeremy I. Johnson ,  Andrew J. Malpass

发明人： Kevin S. Vrondran ,  Jeremy I. Johnson ,  Andrew J. Malpass

IPC分类号： E02D29/14

CPC分类号： E02D29/1445 ,  Y10T137/7021

摘要： A one-piece, unitary manhole cover has dual lifting ports that drain through the outer circumferential edge of the cover. A lifting channel runs from the interior of the upper face out to the outer circumferential edge. A lifting bar spans the lifting channel and defines an ergo lifting port and a pry bar lifting port. Both the ergo lifting port and the pry bar lifting port drain through the outer circumference of the manhole cover.

摘要翻译： 一体式整体式井盖具有通过盖的外圆周边缘排出的双提升口。 提升通道从上表面的内部延伸到外周缘。 提升杆跨越提升通道，并定义了一个ergo提升口和一个撬杆提升口。 ergo提升口和撬杆提升口都通过人孔盖的外围排出。