Hydraulic safety barrier traffic-way controller

Details Hydraulic safety barrier traffic-way controller Hydraulic safety barrier traffic-way controller

1983-04-25

1984-12-25

Novosad, Stephen J.

Road structure, process, or apparatus

Traffic steering device or barrier

404 11, 49 49, E01F 1300

Patent

active

044900686

ABSTRACT:
A vehicle traffic-way controller of retractile barrier configuration wherein activation and control is by hydraulics in the form of a pressure source applied from a motor driven pump and directed by a valve to opposite ends of a double acting cylinder and piston actuator to extend and retract the barrier, there being switch control with positive positioning of the barrier and with impact absorbing protection for the hydraulics and structure.

REFERENCES:
patent: 2187513 (1940-01-01), Evans
patent: 2330739 (1943-09-01), Piron
patent: 2362912 (1944-11-01), Logan, Jr.
patent: 3587233 (1971-06-01), Fischbach
patent: 3626637 (1971-12-01), Rudicel
patent: 3875850 (1975-04-01), Reynolds et al.
patent: 3976158 (1976-08-01), Shaffer
patent: 4202373 (1980-05-01), Hargraves et al.
patent: 4278403 (1981-07-01), Shafer
patent: 4317332 (1982-03-01), Schubert
patent: 4332503 (1982-06-01), Hurst, Jr.

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