Shield excavator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 23, 1996
Grant Date -
N/A
app pub date -
Mar 22, 1995
filing date -
Oct 8, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shield excavator for constructing a tunnel, a hole, a groove and the like having a polygonal, preferably, square section. The excavator (10) comprises: a cylindrical shield body (12) having a polygonal sectional shape; a cutter assembly (18) disposed at a front end portion of the shield body (12) so as to be reciprocatingly movable in a first direction intersecting at least the axis of the shield body (12); and a driving mechanism (16) for driving the the cutter assembly (18). The cutter assembly (18) includes: a plurality of serrated cutters (66) disposed at the front end of the shield body (12) at intervals in a second direction intersecting the axis of the shield body (12) and the first direction and extending in the first direction, or a plurality of plate-shaped cutters (68) disposed at the front end of the shield body (12) at intervals in the first direction and extending in the second direction.
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