Patent ID: 7290799

Claim:
A hydropnuematic jack, comprising: a control key that releases compressed air from a reservoir in a towing vehicle; a reservoir for hydraulic oil; a continuous pneumatic pump; hoses; a control valve that controls the reservoir for the hydraulic oil and the continuous pneumatic pump, the control valve comprising a cartridge valve and handles; and a telescopic boom comprising upper and lower portions, a base, openings that couple screws, and a fastening element, wherein an internal structure of the telescopic boom comprises an inner casing, a piston, hydraulic gaskets, a plunger, and an air entry; wherein the compressed air applies pressure over the reservoir for the hydraulic oil and over the continuous pneumatic pump, the control valve comprises an entry for descent of the oil, an air entry, and a return system, and the cartridge valve comprises spheres and orifices that provide entry and exit of the oil.