Patent ID: 8104564

Claim:
An antitheft method for construction equipment including a hydraulic device for controlling flow of working fluid supplied to an actuator which drives a working device, the antitheft method comprising: a first step of reading information on a function selection switch, a timer, a safety lever and engine operation; a second step of determining whether the function selection switch is turned on or off; a third step of determining whether the safety lever is switched to an OFF position; a fourth step of comparing an input time inputted in a timer with a preset time and if the input time of the timer is shorter than the preset time, proceeding to the second step; a fifth step of determining whether an ignition of the engine is turned on if the function selection switch is switched to an ON state by a driver, the safety lever is switched to the OFF position by the driver, and input time of the timer is longer than a preset time; a sixth step of determining that the driver gets out of a cabin in the state in which the ignition of the engine is turned on, and locking a driving unit so that a driving unit does not operate if it is determined in the fifth step that the ignition is turned on; a seventh step of determining whether a security device is passed by the driver if the driving unit is switched to a lock position; and an eighth step of unlocking the driving unit if a user has passed the security device.