A safety cage improves the safety of workers servicing tanker vehicles having top side hatches. A part or parts of the cage can be repositioned to permit the hatch cover to be opened and then can be returned to a safety enhancing position.
申请公布号
US8479882(B2)
申请公布日期
2013.07.09
申请号
US20100831393
申请日期
2010.07.07
申请人
DUBOSE ADAM LEWIS;BENNETT RONALD WAYNE;ALUMINUM LADDER COMPANY
