Mobile pressure cleaning unit
First Claim
Patent Images
1. A washing and treating unit comprising a water source;
- a plurality of liquid additive tanks;
a water and additive mixing means connected to the water source;
an additive selection means, wherein said selection means communicates sequentially with the additive tanks in a known repeating sequence, said selection means also communicating with the mixing means;
a main pump communicating with the mixing means, whereby liquid is drawn from the water source and one of said additive tanks;
a main pump unloader pressure-sensitive valve communicating with the main pump output, said valve causing the output of the main pump to recirculate to the main pump input when the output pressure of the main pump exceeds a known value;
a spraying means communicating with the unloader valve, whereby liquid under pressure from the main pump may be sprayed; and
a pressure sensing means operably connected to the unloader valve and the selection means, said pressure sensing means being an integral portion of said unloader valve, whereby a pressure change in the output of the main pump causes the selection means to advance to the next position in the sequence.
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Abstract
A mobile cleaning unit for providing high pressure cleaning and rinsing sprays, comprising a van-type vehicle with separate sources of water and cleaning and treating solutions. The sprays may be heated by a self-contained water heater with a fuel ignitor operated by low voltage direct current. The separate solutions are selected by a pressure switch sensitive to an increase in spray line pressure caused by stopping the spray by operation of a valve at the spray applicator. The pressure switch acts to sequentially open a supply valve for each solution in turn.
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Citations
18 Claims
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1. A washing and treating unit comprising a water source;
- a plurality of liquid additive tanks;
a water and additive mixing means connected to the water source;
an additive selection means, wherein said selection means communicates sequentially with the additive tanks in a known repeating sequence, said selection means also communicating with the mixing means;
a main pump communicating with the mixing means, whereby liquid is drawn from the water source and one of said additive tanks;
a main pump unloader pressure-sensitive valve communicating with the main pump output, said valve causing the output of the main pump to recirculate to the main pump input when the output pressure of the main pump exceeds a known value;
a spraying means communicating with the unloader valve, whereby liquid under pressure from the main pump may be sprayed; and
a pressure sensing means operably connected to the unloader valve and the selection means, said pressure sensing means being an integral portion of said unloader valve, whereby a pressure change in the output of the main pump causes the selection means to advance to the next position in the sequence. - View Dependent Claims (2, 3, 4, 5, 7, 12)
- a plurality of liquid additive tanks;
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6. A washing and treating unit comprising a water source;
- a plurality of liquid additive tanks;
a water and additive mixing means connected to the water source;
an additive selection means, wherein said selection means communicates sequentially with the additive tanks in a known repeating sequence, said selection means also communicating with the mixing means;
a main pumping means communicating with the mixing means, whereby liquid is drawn from the water source and one of said additive tanks;
a spraying means communicating with the main pumping means, whereby liquid under pressure from the main pumping means may be sprayed; and
a liquid heating means insertable between the main pumping means and the spraying means, said heating means comprising a heating fuel ignition means having an electrical oscillator powered by low voltage direct current, a step-up transformer operably connected to the output of the oscillator, and a spark gap means operably connected to the output of the transformer, whereby a high voltage spark is supplied to ignite heating fuel. - View Dependent Claims (8, 9, 10, 11)
- a plurality of liquid additive tanks;
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13. A mobile cleaning and treating unit contained in a self-propelled vehicle comprising a water source;
- a plurality of liquid additive tanks;
a water and additive mixing means connected to the water source;
an additive selection means, wherein said selection means comunicates sequentially with the additive tanks in a known repeating sequence, said selection means also communicating with the mixing means;
a main pumping means communicating with the mixing means, whereby liquid is drawn from the water source and one of said additive tanks;
a spraying means communicating with the main pumping means, whereby liquid under pressure from the main pumping means may be sprayed;
a pressure sensing means operably connected to the output of the main pumping means and the selection means, whereby a pressure change in the output of the main pumping means causes the selection means to advance to the next position in the sequence; and
a liquid heating means insertable between the main pumping means and the spraying means, said heating means comprising a heating fuel ignition means, wherein said ignition means is powered by low voltage direct current, the ignition means having an electrical oscillator powered by low voltage direct current, a step-up transformer operably connected to the output of the oscillator, and a spark gap means operably connected to the output of the transformer whereby a high voltage spark is supplied to ignite heating fuel. - View Dependent Claims (14, 15, 16, 17)
- a plurality of liquid additive tanks;
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18. A washing and treating unit comprising a water source;
- a plurality of liquid additive tanks;
a water and additive mixing means connected to the water source;
an additive selection means, wherein said selection means communicates sequentially with the additive tanks in a known repeating sequence, said selection means also communicating with the mixing means;
a main pump communicating with the mixing means, whereby liquid is drawn from the water source and one of said additive tanks;
a main pump unloader valve communicating with the main pump output, said valve causing the output of the main pump to recirculate to the main pump input when the output pressure of the main pump exceeds a known value;
a spraying means communicating with the unloader valve, whereby liquid under pressure from the main pump may be sprayed;
a pressure sensing means operably connected to the unloader valve and the selection means, said pressure sensing means being an integral portion of said unloader valve, wherein a pressure change in the output of the main pump causes the selection means to advance to the next position in the sequence;
a rinse pump connected between the water source and an additional spraying means, whereby rinse water under pressure from the rinse pump may be sprayed; and
a liquid heating means insertable between the water source and the spraying means, said heating means comprising a combustion air blower, a fuel pump, and a heating fuel ignition means having an electrical oscillator powered by low voltage direct current, a step-up transformer operably connected to the output of the oscillator, and a spark gap means operably connected to the output of the transformer, whereby a high voltage spark is supplied to ignite heating fuel, wherein said main pump, rinse pump, blower, and fuel pump share a single driving means which is operably connected thereto.
- a plurality of liquid additive tanks;
Specification