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US 4,668,016 AGranted
Mining machine with adjustable jib
AssigneeThe Dosco Corporation
InventorDennis Hart
Life of this patent
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AssigneeThe Dosco Corporation
InventorDennis Hart
Estimating the term…
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.
A mining machine having a pair of crawler tracks, a means for individually driving each of said crawler tracks, a frame mounted on said crawler tracks, an elongated jib carrying a sprocket at each end, an endless cutting chain supported on said sprockets, cutters and loading flights mounted on said endless cutting chain, and means on said frame supporting said elongated jib, said means supporting said elongated jib consisting of a bridge on said frame, at least one scissors linkage pivotally mounted on said bridge, an arm having a first end attached to said scissors linkage, a front plate mounted on the second end of said arm and means adjustably mounting said elongated jib on said front plate, said means adjustably mounting said elongated jib on said front plate including a first means for rotating said elongated jib between a vertical position and a horizontal position wherein said cutters are directed upwardly and a second means for rotating said elongated jib in a horizontal plane between a position perpendicular to the center line of said machine and a position parallel to the center line of said machine and means mounted on said bridge and connected to said arm to raise and lower said arm to move said elongated jib in the vertical direction relative to said frame, whereby said elongated jib can be adjusted between a mining position and a tram position for moving said machine.
A mining machine having a pair of crawler tracks, a means for individually driving each of said crawler tracks, a frame mounted on said crawler tracks, an elongated jib carrying a sprocket at each end, an endless cutting chain supported on said sprockets, cutters and loading flights mounted on said endless cutting chain and means on said frame supporting said elongated jib, said means supporting said elongated jib consisting of a bridge on said frame, a pair of spaced scissors linkages pivotally connected to said bridge, an arm having a rear end attached to each of said scissors linkages, a cross member, means mounting said cross member on said arms and means adjustably mounting said elongated jib on said cross member for rotating said elongated jib between a vertical position and a horizontal position wherein said cutters are directed upwardly and means for rotating said cross member and said elongated jib in a horizontal plane between a position perpendicular to said crawler tracks and a position parallel to said crawler tracks and means on said bridge for raising and lowering said arms and said means mounting said cross member on said arms to raise and lower said cross member and said elongated jib relative to said frame, whereby said jib can be adjusted between a mining position and a tram position.
A mining machine having a pair of crawler tracks, a means for individually driving each of said crawler tracks, a frame mounted on said crawler tracks, an elongated jib carrying a sprocket at each end, an endless cutting chain supported on said sprockets, cutters and loading flights mounted on said endless cutting chain, and means on said frame supporting said elongated jib, said means supporting said elongated jib consisting of a bridge mounted on said frame, at least one arm pivotally mounted on said bridge, a front plate mounted on said arm and means adjustably mounting said elongated jib on said front plate, said means adjustably mounting said elongated jib on said front plate including a first means for rotating said elongated jib between a vertical position and a horizontal position and a second means for rotating said elongated jib in a horizontal plane between a position perpendicular to the center line of said machine and a position parallel to the center line of said machine, whereby said elongated jib can be adjusted between a mining position and a tram position for moving said machine.
Dependencies are inferred from the claim text.