Patent ID: 6634721
Filing Date: 2003-10-21
Classification: B60R,B60T

Abstract:
A trailer locking device for use with a trailer having a brake line configured to pneumatically interconnect a supply of compressed air to one or more air-operated brakes on said trailer, said trailer locking device comprising:a controller unit connected to a power supply; a control valve electronically connected to said controller unit, said control valve having an inlet and an outlet selectively in fluid communication with said inlet, said inlet pneumatically connected to a brake line outlet pneumatically disposed in said brake line between said supply of compressed air and said brakes, said control valve configured to open in response to an open signal from said controller unit so as to allow compressed air from said brake line to vent from said outlet and maintain said brakes in a locked condition until a close signal is received from said controller unit to close said control valve so as to prevent compressed air from venting through said outlet and place said brakes in an unlocked condition; and control means operatively connected to said controller unit for selectively controlling said control valve.