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US 6,634,139 B1Granted
Dock light warning system
OwnerDonald Metzinventor
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OwnerDonald Metzinventor
Estimating the term…
A dock light warning system includes an exterior unit adapted to be mounted adjacent a loading dock door. The exterior unit is provided with a red light assembly for providing a narrow beam of red light focused on a driver's side exterior rearview mirror when the loading dock door is in the open position to warn a driver against moving the truck. A corresponding interior unit is provided with a red light assembly and a green light assembly to indicate the condition of the red light assembly and the green light assembly of the exterior unit. A photocell assembly is provided for sensing the position of the overhead door to control the switching of the red light assembly to the green light assembly and vice versa.
A dock light warning system comprising a dock door opening having a dock door movably mounted for opening and closing said dock door opening, an exterior unit mounted adjacent said dock door opening, said exterior unit including a red light assembly and a green light assembly operatively associated with said dock door, and control means automatically illuminating the red light assembly upon opening of the dock door and illuminating the green light assembly upon closing of the dock door.
Dependencies are inferred from the claim text.