초록 ▼

A bollard type trafficway barrier for arresting vehicles, comprised of a cast in place foundation and a mounting frame replaceable therein to carry a lift means for the bollard that is directionally oriented with respect to traffic so as to withstand great impacts, and with access for replacement of

A bollard type trafficway barrier for arresting vehicles, comprised of a cast in place foundation and a mounting frame replaceable therein to carry a lift means for the bollard that is directionally oriented with respect to traffic so as to withstand great impacts, and with access for replacement of the bollard, extension and retraction being instantaneous by impact resistant fluid power and controls, the installation being flush with the grade when retracted and the bollard being remotely controlled for above grade extension and retraction.

대표청구항 ▼

A vertically extensible and retractile bollard type trafficway barrier for arresting vehicles, and including; a below grade level foundation of substantial depth and having an open upper end at grade level and having a vertically disposed guide means extending between said open upper end and a botto

A vertically extensible and retractile bollard type trafficway barrier for arresting vehicles, and including; a below grade level foundation of substantial depth and having an open upper end at grade level and having a vertically disposed guide means extending between said open upper end and a bottom thereof, a mounting frame removeably inserted into the foundation through and suspended from the open upper end of the foundation and having a support over the bottom of the foundation, the support having a centered attachment carrying a power operable lift means disposed on a vertical operational axis, a bollard of tube form centered over the power operable lift means and within the foundation and slideably engageable with said guide means for vertical disposition, the upper end of the bollard being accesible and coupled to a reciprocating rod of the power operable lift means to extend the top of the bollard from a retracted position flush with the grade level, and controlled power means to actuate the power operable lift means for reciprocation of the rod and bollard between extended and retracted positions.