Tunnel boring machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 14, 1982
Grant Date -
N/A
app pub date -
Aug 10, 1979
filing date -
Aug 10, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a tunneling machine including a hollow shield, a non-rotatable outer housing mounted in the shield for longitudinal movement, and inner housing rotatably mounted within the outer housing, an excavator including a boom and bucket pivotally mounted on the forward end of the inner housing, and a boom cylinder having a forward portion pivotally engaged with the boom and a rear portion mounted at the rearward portion of the inner housing.
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