Tunnel or road header
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United States of America Patent
Stats
-
Oct 7, 1986
Grant Date -
N/A
app pub date -
Jul 30, 1984
filing date -
Aug 17, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tunnel or road header is provided with a caterpillar running gear and a portal frame. A cutter head means engageable with a tunnel face is mounted displaceably on the frame on a horizontal track extending transversely of the longitudinal direction of the roadway. The cutter head means consists of a shearing machine equipped with a carrier arm which is pivotal parallel to the rock face through more than 360.degree. and a shearing drum which is carried by the carrier arm and which rotates about an axis extending toward the rock face and parallel to the roadway floor.
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