Boundary marker

Details Boundary marker Boundary marker

1976-02-02

1977-01-25

Swisher, S. Clement

Signals and indicators

Street traffic

Portable

E01F 910

Patent

active

040045455

ABSTRACT:
A boundary marker or delineator is disclosed comprising an elongate hollow cylindrical pole member normally held in an upright position with respect to a base member by means of a solid flexible support member. The cylindrical pole member is filled with a solidified foam and closed by opposed end caps held in place by a centrally-disposed rigid rod member threadedly connected to each. When utilized as a path delineator for moving vehicles, the boundary marker is capable of withstanding impact forces upon being struck and crushing forces upon being run over by vehicles of all types.

REFERENCES:
patent: 470873 (1892-03-01), Chapman
patent: 2625760 (1953-01-01), Cleal
patent: 3279133 (1966-10-01), De Korte
patent: 3478714 (1969-11-01), Keats
patent: 3566000 (1971-02-01), Maurer
patent: 3740881 (1973-06-01), Finger
patent: 3851616 (1974-12-01), Brown
patent: 3874103 (1975-04-01), Muta
The Encyclopedia of Chemistry, Hamdel et al., 1973, pp. 876-878.

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