Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1997-10-24
1998-12-29
Gaffin, Jeffrey
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307 101, 340431, 34031001, G08B 2100
Patent
active
058545174
ABSTRACT:
A communication link between a tractor and trailer is established utilizing existing dormant tractor and trailer circuitry. In one embodiment of the invention, a tractor communications device has a communications port connected to a turn signal circuit and a trailer communications device has a communications port connected to the same turn signal circuit. The two communications devices permit communications therebetween over the turn signal circuit as long as the turn signal circuit is inactive, and otherwise inhibits such communications. In another embodiment of the invention, each communications device includes a second communications port connected to the remaining tractor/trailer turn circuit. If electrical power is being supplied to the first turn signal circuit, the two communications devices automatically switch communications to the remaining dormant turn signal circuit.
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Gaffin Jeffrey
Ganjian Peter
Grote Industries Inc.
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