초록 ▼

This apparatus has a unitary, flexible hose assembly with an inner hose for discharging fuel or other liquid under pressure into a tank to agitate its contents and an outer hose for withdrawing the liquid and entrained impurities from the tank. A pump and filters on a wheeled cart are detachably con

This apparatus has a unitary, flexible hose assembly with an inner hose for discharging fuel or other liquid under pressure into a tank to agitate its contents and an outer hose for withdrawing the liquid and entrained impurities from the tank. A pump and filters on a wheeled cart are detachably connected to the opposite end of the hose assembly to continuously recirculate and clean the liquid without intermediate storage of the liquid before it is returned to the tank. The discharge end of the inner hose and a nozzle thereon project several inches beyond the inlet end of the outer hose. An adjustable valve introduces air into the recirculated liquid stream between the outer hose and the pump inlet to increase the turbulence effect inside the tank. For the same purpose the outer hose may be formed with one or more openings near its inlet end.

대표청구항 ▼

In an apparatus for cleaning a tank which is at least partly full of liquid, said apparatus comprising a pump for withdrawing liquid from the tank and pumping it back into the tank, filter means for filtering the liquid withdrawn from the tank before the liquid is returned to the tank, and a unitary

In an apparatus for cleaning a tank which is at least partly full of liquid, said apparatus comprising a pump for withdrawing liquid from the tank and pumping it back into the tank, filter means for filtering the liquid withdrawn from the tank before the liquid is returned to the tank, and a unitary flexible hose assembly comprising an outer hose and an inner hose extending along the inside of the outer hose and defining therewith a return passageway for liquid withdrawn from the tank, the improvement wherein: said outer hose has an inlet opening at its lower end for insertion into the tank to be cleaned and having its upper end operatively connected to the inlet side of the pump to pass thereto the liquid withdrawn from the tank, said inner hose is operatively connected at its upper end to the outlet side of the pump for passing liquid therefrom under pressure through the interior of the inner hose back into the tank, said inner hose has discharge means on its lower end projecting beyond said lower end of said outer hose and having a discharge opening for discharging liquid under pressure from the inner hose into the tank to agitate the contents of the tank for withdrawal through said outer hose, and said pump is operatively connected to said inner and outer hoses to pump the liquid withdrawn through the outer hose in a continuous recirculating flow back into the inner hose substantially immediately without intermediate storage of the liquid.