GRINDING DEVICE
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United States of America Patent
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app pub date -
Jun 20, 2016
filing date -
Jun 20, 2016
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Abstract
The grinding device is for removing a collapsed liner inside a pipe. The grinding device has a connector for a drive shaft, a body rotatable around a rotation axis with the drive shaft and grinding cutters attached to the body. The grinding cutters have cutting edges provided in a plane perpendicular to the rotation axis of the body and the grinding device further has an outer periphery isolated from rotation of the body by bearings.
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