Pavement marker

Road structure – process – or apparatus – Traffic director – Vibration inducing member

Patent

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Details

428913, 350103, E01F 904

Patent

active

042329795

ABSTRACT:
Disclosed herein is a pavement marker for engagement with an underlying roadway for providing a marking visible from an oncoming vehicle on the roadway surface. The pavement marker comprises a lens member of light-transmitting synthetic resin including a front face having a light receiving and refracting portion adapted to be inclined at an angle of at least 15.degree. and a rear face having reflex reflective means for reflecting light transmitted through the light receiving and refracting portion back to the source. In one embodiment, the pavement marker has an abrasion-limiting glass sheet having a thickness no greater than about 15 mils fixedly disposed on the light receiving and refracting portion and preferably under compression throughout the expected temperature range to which the pavement marker is exposed in use. In another embodiment, abrasion-limiting members are raised above the light receiving and refracting portion.

REFERENCES:
patent: 1910791 (1933-05-01), Coppel
patent: 2046321 (1936-07-01), Burkhardt
patent: 2065314 (1936-12-01), Johnson
patent: 2126224 (1938-08-01), Shaffer
patent: 2256636 (1941-09-01), Abbott
patent: 2260498 (1941-10-01), Wise
patent: 2768858 (1955-05-01), DeShazor
patent: 2991698 (1961-07-01), Leubaz
patent: 3332327 (1967-07-01), Heenan
patent: 3516337 (1970-06-01), Gubeza
patent: 3532871 (1970-10-01), Shipman
patent: 3540282 (1970-11-01), Kohler
patent: 3587416 (1971-06-01), Flanagan
patent: 3822158 (1974-07-01), Hoffman
patent: 3836275 (1974-09-01), Finch
patent: 3975108 (1976-08-01), Suhr
patent: 4064308 (1977-12-01), Laurin
Publication (1975) of the Society of the Plastics Industry, Inc. by W. Hertl, Sec. 9G.

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