Vehicle with a seat adjustable in inclination

The wheel chair has four wheels (17), a seat (10) with a backrest (16) and two armrests (11) as well as a footrest. The seat area (10) is fitted with two curved rails (7) attached to its lower surface and guided through the space between each pair of two pairs of rolls located at the top of two bearings exceeding from the frame (1) of the wheelchair. The position of the seat (10) is adjusted to the level of inclination of the surface by an electric drive connected to a sensor element and acting on a telescopic bar.