Retractable safety speed bump

Details Retractable safety speed bump Retractable safety speed bump

1976-03-04

1977-03-15

Byers, Jr., Nile C.

Road structure, process, or apparatus

Traffic director

Vibration inducing member

49 93, E01F 1100

Patent

active

040121569

ABSTRACT:
A permanently installed speed bump or warning device for motorists is particulary adaptable for usage at school crossings and the like. The structure has an active use position above the road surface for deterring and warning drivers and is easily retractable to a nested position wherein a flat surface flush with the roadway is provided so as to allow the smooth passage of vehicles over the device. A convenience tool is provided for moving the device from its active to its inactive positions, and vice-versa.

REFERENCES:
patent: 1543539 (1925-06-01), Wrightson
patent: 3023986 (1962-03-01), Nallinger
patent: 3325782 (1967-06-01), Der

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