Safety pole
OwnerDonald Metzinventor
Life of this patent
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Abstract
A safety pole is comprised of a strip of plastic material having a normal elongated hollow cylindrical condition with overlapping longitudinal edges. A motor driven drum is mounted within a canister adapted to be recessed in the ground in spaced relation to a loading dock with the strip of plastic material connected at one end to the drum whereby the strip of plastic material may be wound on the drum in a flattened condition or extended vertically upwardly to form a pole. A loading dock is provided with a door and the operation of the motor driven drum is coordinated with the operation of the door so that when the door is open, the pole will be in the extended visible condition to warn a truck driven not to approach or leave a loading dock.
Claims6
A safety pole comprised of a flat strip of plastic material secured to and wound on a motor driven drum mounted in a canister adapted to be set in the ground and guide means in said canister for directing said flat strip of material vertically upwardly upon rotation of said drum in an unwinding direction, said strip of plastic material having a shape memory whereby upon extension of the strip in the vertical direction, the strip will automatically form into a cylindrically-shaped pole extending above the ground.
Dependencies are inferred from the claim text.