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US 4,389,149 AGranted
Apparatus for dumping a top-dumping mine car
AssigneeGulf Oil Corporation
InventorTibor Dancs
Life of this patent
Estimating the term…
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AssigneeGulf Oil Corporation
InventorTibor Dancs
Estimating the term…
Apparatus for unloading a top unloading mine car that is mounted to pivot about a horizontal axis extending along one side of the base of the mine car includes a hoist chain detachably connected to the mine car at the side opposite the pivotal axis. The hoist chain extends upwardly over a pulley mounted on a positioning crank arm. The pulley moves on rotation of the crank arm from a position substantially vertically above the connection means when the mine car is in an upright position to a position above the pivotal axis. The hoist chain continues around a pulley mounted on a drive crank arm and then to an attachment of restricted mobility. The drive crank arm and the positioning crank arm are rotated in a single direction by drive means which are adapted to rotate the drive crank arm at twice the angular velocity of the positioning crank arm. On rotation of the crank arms the hoist chain rotates the top unloading car past the axis of rotation to dump the contents of the car and returns the car to the upright position. In a preferred embodiment, the attachment of restricted mobility of the hoist chain is a differential pulley. A compensating chain runs from the differential pulley over an idler pulley to a connection on the positioning arm to adjust the effective length of the hoist chain.
Apparatus for tilting a pivotally mounted top unloading mine car or the like comprising:
In apparatus for tilting a pivotally mounted mine car having an open top to unload the car from the top, the improvement comprising:
In apparatus for unloading a top-unloading, pivotally mounted mine car, the improvement comprising:
Apparatus for unloading a top unloading, pivotally mounted mine car or the like, said mine car having a horizontal pivot axis extending along one side thereof and connection means on the opposite side thereof comprising a positioning crank arm adapted to be mounted above the mine car, said positioning crank arm having a positioning pulley mounted on one end thereof spaced from the axis of rotation of the crank arm constructed and arranged such that on rotation of the positioning crank arm the positioning pulley moves laterally from substantially directly above the connection means on the mine car toward a position substantially directly above the pivot axis, a hoist chain having means at one end for connection to the connection means on the mine car and extending from said connection means over the positioning pulley, means for rotating the positioning crank arm whereby the positioning pulley moves alternately from and to a position above the connection means, and means for alternately increasing and decreasing the effective length of the hoist chain between the positioning pulley and the connection means whereby the hoist chain pulls the mine car through a dead center position at which the center of gravity of the car is directly above the pivot axis.
Apparatus for tilting a pivotally mounted, top unloading mine car or the like having connection means along the side thereof remote from the pivotal mounting comprising a hoist chain, a positioning pulley mounted on the lower end of a pendulum, a connecting rod from the positioning crank arm to the pendulum adapted to move the positioning pulley laterally on rotation of the positioning crank arm, a drive crank arm having a drive pulley mounted on one end thereof remote from the axis of rotation of the drive crank arm, said hoist chain extending from the mine car connection means over the positioning pulley and around the pulley on the drive crank arm and then to a point of attachment that limits movement of the hoist chain, driving means connected to the crank arms constructed and arranged to rotate the crank arms in a single direction and to rotate the drive crank arm at twice the angular velocity of the positioning crank arm, said positioning crank arm being located above the mine car and adapted to move laterally on rotation of the positioning crank arm ahead of the connection of the hoist chain to the mine car as the hoist chain lifts the connection to the mine car.
Dependencies are inferred from the claim text.