Widening apparatus
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Apr 19, 1999
filing date -
Apr 22, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for widening microtunnels and/or for the destruction and replacement of ground-laid pipework and for the laying of new pipework possesses a tool which displaces the earth and/or destroys and/or displaces pipework laid in the earth, having a housing which is provided with an axial linkage seating, for example a housing passage for a linkage and with a linear drive which moves the tool, for example, on the linkage automatically from a launch pit to an arrival pit and simultaneously lays a follow-up pipe or a follow-up cable in the earth.
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