Cleaning method
First Claim
1. A cleaning method that is particularly useful for cleaning surfaces formed of relatively hard materials which are contaminated with relatively hard embedded deposits of undesirable materials that are difficult to remove by conventional washing or abrading cleaning methods, and while substantially reducing the effluent resulting from the cleaning step so that the cleaning method may be conveniently used in areas where effluent disposal may be a problem such as smaller indoor rooms, areas, or equipment, the method comprising pressurizing a cleaning liquid with a gas driven hydraulic pump located at or close to a surface to be cleaned and directing a flow of the cleaning liquid from the gas driven hydraulic pump toward a surface to be cleaned at a pressure of between about 5,000 and 15,000 pounds per square inch (psi) and at a volumetric flow rate of greater than about 0.3 and less than 1.0 gallons per minute (gpm), so that the pressure of the cleaning liquid being directed toward the surface is sufficient to remove from the surface deposits of the type that cannot be removed by mechanical scrubbing, using tools or chemical detergent action other than by damaging the surface itself, and in which the volumetric flow rate at that pressure is small enough so that the liquid flow does not cause damage to the surface that would otherwise occur if the same pressure were used at a higher volumetric flow rate.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention is a cleaning method and associated apparatus that are particularly useful for cleaning surfaces formed of relatively hard materials such as grout or industrial rolls which are contaminated with relatively hard embedded deposits of undesirable materials that are difficult to remove by conventional washing or abrading cleaning methods, and while substantially reducing the effluent resulting from the cleaning step so that the cleaning method may be conveniently used in areas where effluent disposal may be a problem such as smaller indoor rooms, areas, or equipment. The invention comprises pressurizing a cleaning liquid with a gas driven hydraulic pump and directing a flow of the cleaning liquid from a nozzle at surfaces to be cleaned at a pressure of at least about 5,000 pounds per square inch (psi) and at a volumetric flow rate of no more than about 1.5 gallons per minute (gpm), so that the pressure is sufficient to remove from the surface deposits of the type that cannot be removed by mechanical scrubbing using tools or chemical detergent action other than by damaging the surface itself, and in which the liquid flow rate at that pressure is small enough to prevent damage to the surface that would otherwise occur if the same pressure were used at a higher volumetric flow rate. A traversing device may also be used to move the nozzle across surfaces to be cleaned.
58 Citations
21 Claims
- 1. A cleaning method that is particularly useful for cleaning surfaces formed of relatively hard materials which are contaminated with relatively hard embedded deposits of undesirable materials that are difficult to remove by conventional washing or abrading cleaning methods, and while substantially reducing the effluent resulting from the cleaning step so that the cleaning method may be conveniently used in areas where effluent disposal may be a problem such as smaller indoor rooms, areas, or equipment, the method comprising pressurizing a cleaning liquid with a gas driven hydraulic pump located at or close to a surface to be cleaned and directing a flow of the cleaning liquid from the gas driven hydraulic pump toward a surface to be cleaned at a pressure of between about 5,000 and 15,000 pounds per square inch (psi) and at a volumetric flow rate of greater than about 0.3 and less than 1.0 gallons per minute (gpm), so that the pressure of the cleaning liquid being directed toward the surface is sufficient to remove from the surface deposits of the type that cannot be removed by mechanical scrubbing, using tools or chemical detergent action other than by damaging the surface itself, and in which the volumetric flow rate at that pressure is small enough so that the liquid flow does not cause damage to the surface that would otherwise occur if the same pressure were used at a higher volumetric flow rate.
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12. A cleaning method that is particularly useful for cleaning surfaces formed of relatively hard material such as grout which are contaminated with relatively hard embedded deposits of undesirable materials that are difficult to remove by conventional washing or abrading cleaning methods, and while substantially reducing the effluent resulting from the cleaning step so that the cleaning method may be conveniently used in areas where effluent disposal may be a problem such as smaller indoor rooms, areas, or equipment, the method comprising directing a cleaning liquid at a moderate pressure to a gas driven hydraulic pump located at or close to a surface to be cleaned;
- raising the pressure of the cleaning liquid with the gas driven hydraulic pump from the moderate pressure to a pressure of between about 5,000 and 15,000 psi near the pump;
directing the cleaning liquid form the pump to a flat spray nozzle at a volumetric flow rate of greater than about 0.3 and less than 1.0 gpm; and
ejecting the cleaning liquid in a spray from the nozzle with the nozzle placed in close proximity to a surface to remove undesirable embedded deposits from the surface without causing damage to the surface which would occur if a liquid spray having the same pressure and a higher volumetric flow rate were used. - View Dependent Claims (13, 14, 15, 16, 17)
- raising the pressure of the cleaning liquid with the gas driven hydraulic pump from the moderate pressure to a pressure of between about 5,000 and 15,000 psi near the pump;
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18. A method of cleaning industrial rolls such as the type useful in the production and processing of paper, textiles, other web materials, and synthetic fibers, which are contaminated with relatively hard deposits of undesirable materials that are difficult to remove by conventional washing or abrading cleaning methods, and while substantially reducing the effluent resulting from the cleaning step so that the cleaning method may be conveniently used in areas such as within equipment where effluent disposal may be a problem, the method comprising:
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pressurizing a cleaning liquid with a gas driven hydraulic pump located near a surface to be cleaned from a moderate pressure between about 14.7 psi and 140 psi to a pressure of about 11,500 psi at a flow rate of about 0.75 gpm; directing the cleaning liquid to a flat spray nozzle; further directing the cleaning liquid from the flat spray nozzle to a surface to be cleaned; and moving the nozzle across the surface of the roll with a power driven traversing device to ensure uniform and complete spraying of a surface. - View Dependent Claims (19, 20, 21)
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Specification