Power Packs energizing rescue tools sofar supplied only limited hydraulic power, thereby being forced to operate in two steps of e.g. 180 bar/2,500 psi or 720 bar/10,000 psi. This is disadvantageous due to interruption of operating forces when switching over, and two different speeds normally of the ratio 4:1. Best would be to have a system reaching infinitely controllable from zero to max. force.
AUTRONIC-Hydrotechnik GmbH, D-22339 Hamburg is producing such equipment which, instead of having an own combustion engine, is using a normal hydraulic drive of about 140 to 250 bar (2,000 to 3,500 psi) as available from utility vehicles or increasingly from fire fight vehicles, too. An oil hydraulic transformer will transform the normal vehicle pressure into high tooling pressure of 630, 720 or 1,000 bar (9,000, 10,000 or 14,000 psi) or even more. Covering a power of up to 20 kW, it is sized like a cigar box at a weight of 12 to 15 kg (24 to 30 pds). To drive a multitude of tools, a multitude of hydraulic transformers can be assembled on a oil supply and relief boom, thereby avoiding to assemble a lot of hydraulic hoses. This system allows to build up specialized disaster relief vehicles based on passenger cars, off-roaders or pick-ups to operate after terror attacks or disasters. Obviously, these oil hydraulic transformers can be combined with water hydraulic transformers used for firefighting purposes. In this way, efficient and strong rescue and fire fight vehicles can be built up at low prices.