发明名称 Traffic channeling devices
摘要 Traffic channeling device includes a deformable plastic drum and a rubber collar insertable over the drum to act as ballast for the drum. The rubber collar comprises a bead portion and an integral side wall portion of a recycled truck tire. When the rubber collar is inserted over the drum, the rubber collar gives the drum a relatively low center of gravity and grips the ground over a relatively large surface area to resist tipping of the drum and eliminate walking of the drum on the ground.
申请公布号 US5234280(A) 申请公布日期 1993.08.10
申请号 US19920860179 申请日期 1992.03.30
申请人 PLASTIC SAFETY SYSTEMS, INC. 发明人 COWAN, DAVID A.
分类号 E01F9/00;E01F9/012;E01F9/015;E01F13/00;E01F13/02;E01F13/04 主分类号 E01F9/00
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