The anti theft device with brake lock functions by locking a vehicle’s brakes. It does this by restricting the flow of the hydraulic fluid, inside the brake system.
Even though there are many devices with anti-theft functions available for sale, a huge number of cars are still stolen each year. With each additional device that appears on the market you see that they become much more complicated and they cost much more as well. In the mean time, their reliability and car theft deterrence ability remain the same. This is the case with brake locks, switches for ignition shut-off or alarms.
These brake locks are placed in the system of the hydraulic brakes of the car. Once the brakes are pressurized, the brake lock will not allow the fluid to go or come from the brakes. You can only use the brakes when the lock is released. The brake locks that are currently used are devices that are quite intricate, with many elements inside and parts that move and boost the device’s price, while the durability and reliability are decreased. That’s why a system is needed that is dependable, affordable and simple and does its job of anti theft deterrent well.
This type of tool will usually come with a hydraulic valve that will keep the brakes locked after the activation of the device. The lock will be installed between the master cylinder and the brake cylinders, in the line of the hydraulic brake. Once the brakes are depressed while the brake fluid system is pressurized, the device will work towards inhibiting the flow of the fluid in the system of the brakes, so the pressure is maintained and the brakes are locked.
This device has a hydraulic cylinder, which has a fluid chamber inside, plus an outlet and inlet for the brake fluid in the chamber, which allows for fluid communication. Inside the fluid chamber there is a valve seat, which communicates with the inlet by fluid. The fluid chamber has a spring, with a ball valve element which is held in the spring’s coils. Since the spring is biased, its compression will push the element of the ball valve against the seat’s valve and the flow of the fluid will be restricted.
Attached, is a lock mechanism that is operated with a key, which will work towards actuating the device. When the lock is rotated, a male cam will rotate as well, which will thrust a female cam into a spring. As a result, the spring will be compressed, with the help of a piston, which sits between the spring and the female cam. When there is compression on the spring, the ball will press on the valve seat, so the flow of the fluid is restricted between the inlet and the outlet. This will lock the brakes as a result. If you depress the pedal before the device activation, the brake will lock upon actuation. You can also actuate it before the brakes are depressed. When this happens, the flow of the fluid will be allowed when the brakes are depressed. However, the back flow will be restricted, so the ball will seat on the valve firmly, thanks to the fluid flow reverse pressure.
This is how a simply device that is both reliable and inexpensive will work and prevent a vehicle theft.