Trailer anti-theft device
First Claim
1. An anti-theft device for use with a vehicle having an air brake system, the anti-theft device comprising:
- a command unit for receiving a signal from a triggering device and for outputting one of a first and a second command in response to receipt of the signal;
a controller having an input coupled to the command unit for receiving the one of the first and the second command from the command unit, the controller for coupling in series with a service line of the vehicle, the controller having a service line input and a service line output, the controller coupling the service line input to the service line output when the second command from the command unit is received, the controller decoupling the service line input from the service line output when the first command from the command unit is received.
5 Assignments
0 Petitions
Accused Products
Abstract
An anti-theft device is coupled in series with a supply line and a service line of a trailer. When activated, the anti-theft device prevents theft of the trailer by decoupling the supply and service lines of the trailer from the reservoir and brake cylinders of the trailer, and by coupling the supply and service lines to the atmosphere, thereby preventing a prospective thief from releasing the trailer'"'"'s brakes by restoring air to the supply and service lines. When the anti-theft device is deactivated, the supply and service lines are re-coupled to the reservoir and brake cylinders to allow the driver to release the trailer brakes.
32 Citations
20 Claims
-
1. An anti-theft device for use with a vehicle having an air brake system, the anti-theft device comprising:
-
a command unit for receiving a signal from a triggering device and for outputting one of a first and a second command in response to receipt of the signal; a controller having an input coupled to the command unit for receiving the one of the first and the second command from the command unit, the controller for coupling in series with a service line of the vehicle, the controller having a service line input and a service line output, the controller coupling the service line input to the service line output when the second command from the command unit is received, the controller decoupling the service line input from the service line output when the first command from the command unit is received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An anti-theft device for use with a trailer having an air brake system, the anti-theft device comprising:
-
a command unit for receiving a signal from a triggering device and for outputting one of a first and a second command in response to receipt of the signal; a controller air valve having an input coupled to the command unit for receiving the one of the first and the second command from the command unit, the controller air valve for coupling in series with a supply line of the trailer and a service line of the trailer, the controller air valve having a service line input, a supply line input, a service line output, and a supply line output, the controller air valve coupling the service line input to the service line output and coupling the supply line input to the supply line output when the second command from the command unit is received, the controller air valve decoupling the service line input from the service line output and decoupling the supply line input from the supply line output when the first command from the command unit is received. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification