With the assistance of external air pressure inside the integrated water storage tank will be created a hydraulic pressure. Via pneumatic actuated relief valves the pressure-water attains to the working chamber and generates lifting power. The steering of the working- and safety-circuits effect by a simple and safe “One Lever Deadman Steering“. The safety requirements of the European CE-normatives and the Northamerican ANSI/ALI-regulations are fulfilled and have been certified. All pneumatic/hydraulic components are made of corrosion resistance materials like anodized aluminum, stainless steel and brass.