Collapsible traffic cone marker

作者: Bruce E. Campbell

DOI:

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摘要: Disclosed herein is a collapsible traffic cone marker characterized by cylindrical base portion having one open face, an upwardly extending spiral reflective capable of collapsing and nesting within the portion, bolt mechanism which can retain reflector casing when actuated or released allow spring to extend thereby approximating conventional conical marker.

参考文章(6)
Robert M Isenberg, Airport taxiway reflector ,(1950)
Howard Brynes, Inflatable and collapsible pylon ,(1970)
Ray L. Gorder, Anton R. Uchytil, Reusable safety warning device ,(1976)
Cioffi Louis A, Gallimore Thomas A, Traffic cone marker assembly ,(1958)
Thomas Fama, Jack Palazzolo, Collapsible road marker ,(1969)