Blasting air tube with sleeve, and method
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
May 6, 2008
filing date -
May 6, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An inflatable air tube includes a sleeve member arranged concentrically about the upper end portion of the air tube to define a receptacle chamber for receiving a quantity of bulk explosive blasting powder, thereby to add weight to the air tube for positioning and stabilizing the same in the bulk explosive powder during the depositing of the powder into a blasting hole drilled into the ground. According to the method of the present invention, a plurality of accurate blasting patterns may be provided in the blasting powder column by timing the manual or mechanical insertion of the air tubes into the bulk blasting powder relative to the rate of supply of the powder from a source thereof.
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