Post

Details Post Post

1977-11-09

1980-04-08

Leppink, James A.

Static structures (e.g., buildings)

Frangible section or means

291635R, 295272, 404 10, E04C 100

Patent

active

041965507

ABSTRACT:
A post for traffic signs, electrical or telephone lines, lighting fittings and the like adapted to have minimum resistance when being hit by vehicles and the like, but sufficient stability under normal conditions, having a pipe with a series of intermittently arranged longitudinal, longish and scattered weakened slot-like portions and a covering layer enclosing the pipe and circumferentially stabilizing the pipe portions separated by the weakened portions.

REFERENCES:
patent: 701426 (1902-06-01), Tuttle
patent: 724744 (1903-04-01), Schratwieser
patent: 3853418 (1974-12-01), Druin
patent: 3869778 (1975-03-01), Yancey
patent: 3987593 (1976-10-01), Svensson

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