Road structure – process – or apparatus – Traffic steering device or barrier
Patent
1975-09-19
1977-01-25
Byers, Jr., Nile C.
Road structure, process, or apparatus
Traffic steering device or barrier
404 9, 256 131, E01F 1300
Patent
active
040048578
ABSTRACT:
Moveable barrier apparatus is disclosed for use in controlling traffic along parallel lanes of a roadway. The apparatus includes elongate channels which are embedded in the roadway transversely of the lanes at spaced-apart positions. Carrier cars are mounted by roller bearings for movement lengthwise within each channel, and posts which are mounted on the cars extend upwardly above the roadway through slots formed along the channels. An elongate upstanding barrier is mounted on the posts to form a divider between adjacent lanes of the roadway. Actuators are mounted in each of the channels for moving the cars and posts lengthwise of the channels for selectively changing the transverse position of the barrier. In one embodiment the actuator comprises a single hydraulic ram, and in another embodiment the actuator comprises a pair of telescoping hydraulic rams positioned on opposite sides of the car within the channel. A lane transition zone is provided in which the actuators are operated through differential strokes so that the lane division defined by the barrier follows a curved or slanted path. In the transition zone sliding joints are provided to accommodate displacement of the ends of the barrier sections relative to the posts. The control means for conjointly operating the actuators includes a parallel fluid circuit. Releasable connectors are provided in the circuit to facilitate coupling with a mobile source of fluid pressure.
REFERENCES:
patent: 2143433 (1939-01-01), Curtis
patent: 2260051 (1941-10-01), Pardee
patent: 2287685 (1942-06-01), Jelinek
patent: 3245327 (1966-04-01), Wasley
patent: 3369634 (1968-02-01), Mazelsky
patent: 3391620 (1968-07-01), Mahoney
patent: 3690619 (1972-09-01), Kendall
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