Motor vehicles – With means for promoting safety of vehicle – its occupant or... – By preventing unauthorized or unintended access or use
Patent
1995-06-22
1996-11-05
Tyson, Karin L.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
By preventing unauthorized or unintended access or use
188353, 303 53, B60R 2508
Patent
active
055707564
ABSTRACT:
A vehicle security system for immobilizing a vehicle to prevent theft and other unauthorized movement of the vehicle. The system includes a brake blocking valve for selectively preventing fluid communication between the vehicle wheel brake cylinders and the vehicle brake master cylinder. The brake blocking valve is activated after the vehicle is brought to a stop, the service brakes are applied, and either an activation pushbutton is pressed to engage the system while the engine is running, or, alternatively, the system is automatically activated by turning off the ignition switch while foot pressure is maintained on the service brake. In addition to blocking vehicle movement by locking the service brakes in the brake engaged condition, the system also disables the starter by opening the starter circuit, and it disables the ignition coil by opening the ignition circuit, thereby further deterring and preventing unintended vehicle movement. Deactivation of the system is effected by entering a deactivation code into a numerical keypad mounted on the vehicle dashboard. The deactivation code is known only to an authorized user of the vehicle.
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Blatstek
Tyson Karin L.
LandOfFree
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