Mixing drum
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United States of America Patent
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Dec 6, 2011
Grant Date -
Sep 18, 2008
app pub date -
Aug 15, 2003
filing date -
Aug 15, 2003
priority date (Note) -
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Abstract
A concrete mixing drum includes a wall having a first section (41) and a second section (43). The first section (41) extends in a spiral along an axial centerline (31) of the drum. The second section (43) extends in a spiral along the axial centerline (31) of the drum adjacent to the first section (41).
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