The patent involves four closed slots on the undercarriage of cars, each equipped with sliding frames that can be opened when needed. Inside each "rectangle," a jack is contained to lift the vehicle off the ground. The lifting system consists of lifting devices connected to the undercarriage and operated by electric or fluid motors. These devices can extend or retract to raise or lower the vehicle.

Each lifting device comprises a base, a link, and an intermediate portion. The base makes contact with the ground when the device is extended. The intermediate portion can contract or elongate to allow the lifting device to move between the retracted and extended positions.

In the first embodiment, the lifting devices are powered by electric motors connected to a transmission mechanism. This mechanism uses a screw and a nut to move the lifting device. The articulated parallelogram in the intermediate portion allows the lifting device to extend or retract based on the screw's rotation.

In the second embodiment, the lifting devices are operated by a pressurized fluid source, such as air or oil. The intermediate portion is connected to a cylinder that can be extended or retracted by the fluid's pressure. A bellows element connected to the cylinder allows for the elongation or retraction of the intermediate portion.

Both embodiments allow for safe and stable lifting of the vehicle. The user can command the lifting of the vehicle through a user interface, enabling faster and safer maintenance interventions. Additionally, the vehicle's control unit can selectively control the lifting devices to raise the vehicle in various ways, depending on the requirements.

The Improved Jack System is a lifting system to elevate the vehicle off the ground. This system utilizes lifting devices powered by electric or fluid motors to enable safe and stable lifting of the vehicle. The user can control the lifting through a user interface, facilitating quicker and safer maintenance operations. The patent images showcase the different configurations of the lifting devices and the connections between the lifting system's components.

Lastly, as the electric vehicle market gains more purchasing power, all four jacks can be deployed simultaneously, allowing the car to lift completely off the ground and facilitate battery replacement autonomously.