Trench excavator
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United States of America Patent
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-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Mar 10, 1986
filing date -
Mar 15, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trench excavator capable of excavating a trench of a rectangular section suitable for formation of an underground diaphragm wall. The underground diaphragm walls are now applied as underground structures replacing caissons, rigid foundations for multistory or tower like buildings, underground tanks and the like. In the trench excavator according to the invention, a pair of drum cutters and a ring cutter interposed therebetween form one unit and a plurality of such units are arranged parallel to one another, whereby an unexcavated portion produced between the drum cutters can be cut out by the ring cutter, leaving no unexcavated portion.
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