Modified stone column drill
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 14, 2016
Grant Date -
Nov 12, 2015
app pub date -
Dec 10, 2013
filing date -
Dec 10, 2012
priority date (Note) -
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Abstract
A granular stone column drill which includes a first drill, a second drill and a displacement device, where—the first drill includes a tube within which the second drill at least partially, co-axially, lies; —the second drill includes a drill flight and first terminal end; —the displacement device includes a displacement unit and at least one guidance means; —the displacement unit includes a guide channel and an exposed wall such that the guide channel extends into the exposed wall; —the exposed wall lies approximately parallel to a centerline of the second drill; and—the at least one guidance means are located within the guide channel; such that the guide channel is a continuous circumferential channel that follows a wave like path, and either the at least one guidance means or the displacement unit is releasably or permanently attached to the second drill.
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