Devices and methods of making hollow concrete elements
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United States of America Patent
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Jun 18, 2013
Grant Date -
Jul 28, 2011
app pub date -
Oct 8, 2008
filing date -
Oct 8, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Devices and methods for making hollow concrete elements are disclosed. A device includes a drum mold having a tubular mold wall. The mold wall has a first and a second end flange each with an inner periphery smaller than the inner periphery of the mold wall at each respective end. The device further includes a compaction roller positionable inside the mold wall. The compaction roller has a profile that defines the interior shape of the concrete element. The compaction roller is supported by a hydraulically height adjustable supporting mechanism that is operable to independently adjust the distance of each end of the compaction roller with respect to the inner periphery of the mold wall.
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