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US 2008/0176487 A1Published application
Portable cleaning and blasting system for multiple media types, including dry ice and grit
OwnerJay T. Armstronginventor
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OwnerJay T. Armstronginventor
Estimating the term…
Blast-cleaning systems are disclosed, which enable a single system to handle different classes of particulate blasting media, such as grit, powder, and dry ice, and to deliver controllable mixtures of different media types during a blasting operation. This “multi-media” system includes a hopper having two chambers or other supply assemblies that are isolated from each other, for holding two different types of blasting media. Both chambers provide their particulates to a metering control device, which supplies a compressor. For example, by combining grit with dry ice, extremely efficient cleaning can be accomplished, with greatly reduced production of solid waste. Tests have shown that combinations of dry ice (at roughly 90%) with a grit or powder can provide far greater cleaning efficiency than either media type by itself.
A mechanical system suited for use in blast-cleaning of structural surfaces, comprising a hopper assembly designed to provide at least two different types of particulate blasting media to an outlet hose, wherein said hopper assembly comprises:
A method for blast-cleaning of structural surfaces, comprising the step of using a particulate blasting media mixture, wherein a first constituent of said particulate blasting media mixture comprises dry ice particles, and wherein a second constituent of particulate blasting media mixture is selected from the group consisting of powdered and grit blasting media other than water ice, and wherein the method utilizes a blast-cleaning system that enables an operator to adjust relative volumes of said first and second constituents of said particulate blasting media mixture.
Dependencies are inferred from the claim text.