Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1983-09-06
1986-02-11
Smith, James G.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51436, B65G 5350
Patent
active
045691606
ABSTRACT:
A sand blasting apparatus utilizes an aspiration system (1) to draw particulate media such as sand and a carrier gas such as air into a mixing chamber of a discharge nozzle through an aspiration probe and through a media supply conduit from a media reservoir, (2) to draw a liquid such as water into the mixing chamber through a liquid supply conduit from a liquid reservoir, and (3) to combine the liquid, the media and the carrier gas with a propulsion fluid such as compressed air so that what discharges from the nozzle is a controlled, uniformly combined flow of media, carrier gas, liquid and propulsion fluid. The aspiration effect needed to draw the media, the carrier gas and the liquid into the discharge nozzle is achieved by passing a flow of propulsion fluid along a flow path through the mixing chamber. The combined flow which discharges from the nozzle provides an enhanced blasting action. The presence of the liquid in the discharging flow diminishes the tendency of clouds of dust to form as tends to occur if dry media alone is used in a blasting operation. The apparatus utilizes a particularly advantageous type of aspiration probe which is inserted into the media reservoir for delivering a flow of media and carrier gas to the media supply conduit. The media probe has a tube-within-a-tube construction with an inner media supply tube being surrounded, at least in part, by an outer carrier gas supply tube. A flow control regulator is provided to enable the flow rate at which liquid is delivered from the liquid reservoir to the nozzle to be preset and/or controlled so that the relative percentages of media and liquid in the discharging flow can be adjusted for optimum performance.
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Burge David A.
Smith James G.
Zatarga J. T.
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