Trailing distance and safe passing indicator for trailer

Details Trailing distance and safe passing indicator for trailer Trailing distance and safe passing indicator for trailer

1985-11-15

1987-02-24

Watkins, Donald

33264, G02B 508, G01C 300

Patent

active

046453156

ABSTRACT:
A device mounted on the right rear of a trailer driven by a motor vehicle to denote when it is safe to move back into the normal driving lane of a highway, after passing a vehicle and while in the passing lane. The device is a transparent reflector mounted on the right rear of the trailer and which is illuminated by the passed vehicle when falling behind the trailer. By means of a right view mirror on the driving motor vehicle, the driver of the vehicle which pulls the trailer will know from the sudden appearance of light reflected on his rearview mirror, from the transparent reflector, that it is safe to move from the passing lane to the driving lane. A modification, particularly useful in the daytime, is a calibrated, sideview mirror on the driving vehicle which gives a visual indication of how far to the rear of the trailer the passed vehicle is located. This will indicate when it is safe to move back into the normal driving lane.

REFERENCES:
patent: 1311253 (1919-07-01), Stern
patent: 2200168 (1940-05-01), Goldberg
patent: 2871754 (1959-02-01), Marble
patent: 3772795 (1973-11-01), Calvert
patent: 4023029 (1977-05-01), Fischer

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