Depressible roadway marker

Details Depressible roadway marker Depressible roadway marker

1987-06-04

1989-08-08

Massie, IV, Jerome W.

Road structure, process, or apparatus

Traffic director

Yielding

404 15, E01F 906

Patent

active

048547689

ABSTRACT:
A depressible roadway marker has an outer metal housing within which an elastomeric core is held. The core holds a retroreflective lens element above the level of the roadway which depresses into the metal housing when run over by a vehicle tire. The core includes a wiping element to scrub the lens element each time the core is depressed. The core includes structure to absorb the forces encountered during depression to reduce fatigue damage to the core.

REFERENCES:
patent: 2703038 (1955-03-01), Shaw
patent: 3693511 (1972-09-01), Medynski
patent: 4111581 (1978-09-01), Auriemma
patent: 4232979 (1980-11-01), Johnson, Jr. et al.
patent: 4504169 (1985-03-01), Jones
patent: 4659248 (1987-04-01), Flanagan

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