Vehicle mounted backing distance gauge

Geometrical instruments – Straight-line light ray type – Alignment device

Patent

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Details

33533, 33645, 33832, 116 28R, G01B 514

Patent

active

056553064

ABSTRACT:
A vehicle mounted backing distance gauge is provided, in which a plunger, normally biased to an extended position, extends approximately ten inches behind the vehicle, and as the vehicle is backed toward an object such as a loading dock, the plunger comes into contact with the object and retracts into a casing mounted to the driver's side of the vehicle. The plunger has an internal beam that moves in concert with the plunger, and through the use of a bevel gear pair and a follower arm controllably moved by the forward end of the internal beam, an indicator sign is rotated or pivoted by a shaft coupled to one of the bevel gears from a first position parallel to the side of the vehicle and extending toward the rear of the vehicle, to a diametrically opposed position parallel to the vehicle, but extending toward the front of the vehicle. The movement of the indicator sign is monitored by the driver, and the last increment of approach is highly visibly represented as a bright or high contrast flange face carried by the sign begins to, and ultimately does, disappear behind a wall of a sign housing protruding from the side of the vehicle.

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