Abstract: Solid friction shock absorber operated by a pressurized fluid which enables the quick dissipation, through solid friction, of the elastic energy absorbed by vehicles' suspensions. The pressurized bag presses the brake pads with brake linings against the inner wall of the body, creating a solid friction which dissipates the elastic energy absorbed. The pressurized fluid bag and the brake linings are installed on the shaft by presses. The pressurized fluid bag is fed by a feeder tube, a pressurized disk, or by a compressor.