Mining machine with adjustable jib
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 1987
Grant Date -
N/A
app pub date -
Jan 13, 1986
filing date -
Jan 13, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A crawler track mounted mining machine having a frame and an adjustable jib carrying an endless cutting chain having cutters and loading flights mounted on the frame. A bridge on the frame and spaced arms having one end pivotally connected to the bridge and the other end supporting a front plate upon which the jib is adjustably mounted by a rotatable bearing supporting a cross member which carries hinges pivotally supporting the jib. Hydraulic rams extend between the cross member and the jib to rotate the jib between a vertical position and a horizontal position and a hydraulic ram extends between the rotatable bearing and the front plate to rotate the front plate and the jib in a horizontal plane between a position perpendicular to the crawler tracks and a position parallel to the crawler tracks. Hydraulic rams extend between the bridge and the arms to raise and lower the arms and the jib relative to the frame.
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