Apparatus and a method for constructing an underground curved multisectional wall and stratum
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United States of America Patent
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Dec 17, 2013
Grant Date -
Oct 7, 2010
app pub date -
Apr 12, 2010
filing date -
May 31, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
Unit plates are supported by unit frames connected consecutively together for turning about axes being remote from and crossing a longitudinal axis of the frames with the ability to alternately be shifted about the turning axes by rams coupled between the plates and frames and expanded while the frames are shifted continuously. The front frame supports alternately a face-and-end pumping mill, facing disk or wedge or endless chain cutter. A ski tenon supported on the front end of the front frame that is able to be engaged with a ski-trak means of adjacent from behind the same unit frames for relative turning about the axes and disengaged in the trench.
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