Movable or removable closures – With traffic director or controller; e.g. – one-way
Patent
1999-09-24
2000-09-19
Stodola, Daniel P.
Movable or removable closures
With traffic director or controller; e.g., one-way
404 6, E01F 1300
Patent
active
061193976
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 driver not to approach or leave a loading dock.
REFERENCES:
patent: 3086430 (1963-04-01), Emmel
patent: 3417508 (1968-12-01), Sprung
patent: 4122629 (1978-10-01), Rennick
patent: 4576508 (1986-03-01), Dickinson
patent: 4715742 (1987-12-01), Dickinson
patent: 4919563 (1990-04-01), Stice
patent: 5365694 (1994-11-01), Macaluso
patent: 5425595 (1995-06-01), Roper
Cohen Curtis A.
Stodola Daniel P.
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