Drilling machine for digging trenches in the ground
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United States of America Patent
Stats
-
Jan 31, 1989
Grant Date -
N/A
app pub date -
Aug 5, 1987
filing date -
Aug 7, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drilling machine for digging trenches in the ground of the type comprising at least one substantially vertical support plate (3) on which are mounted two drilling drums (2) one one each side of it for rotation about an axis (4) substantially perpendicular to the plate. The downwardly facing edge surfaces of said plate have portions (13) inclined relative to the direction perpendicular to said plate.
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Family
International Classification(s)
Cited Art Landscape
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