Mine roof support unit
AssigneeGewerkschaft Eisenhutte Westfalia
InventorHarry Rosenberg
Life of this patent
Estimating the term…
Abstract
A mine roof support unit includes a pair of generally parallel floor girders, and an advance mechanism positioned between the floor girders. The advance mechanism comprises a hydraulic advance ram and a guide rod system. The advance ram is pivotally connected between the guide rod system and a cross member which interconnects the floor girders. The guide rod system is attachable to a longwall conveyor positioned adjacent to a work face. The cross member is engageable with the floor girders in such a manner that the floor girders are relatively displaceable in a vertical direction. Each of the floor girders is provided with a respective hydraulic lifting ram, the arrangement being such that the lifting rams can be operated to lift one of the floor girders relative to the other floor girder.
Claims18
A mine roof support unit including a pair of generally parallel floor girders, and an advance mechanism positioned between the floor girders, the advance mechanism comprising a hydraulic advance ram and a guide rod system, the advance ram being pivotally connected between the guide rod system and a cross member, the guide rod system being attached to an abutment means positioned adjacent to a work face, means for engaging the cross member with the floor girders in a manner permitting the floor girders to be relatively displaceable in a vertical direction, wherein each of the floor girders is provided with a repsective lifting mechanism, the arrangement being such that the lifting mechanisms can be operated to lift one of the floor girders relative to the other floor girder.
A mine roof support unit including a pair of generally parallel floor girders, and an advance mechanism positioned between the floor girders, the advance mechanism comprising a hydraulic advance ram and a guide rod system, the advance ram having a cylinder pivotally connected to the guide rod system and a piston pivotally connected to a cross member, the guide rod system being attached to an abutment means positioned adjacent to a work face, means for engaging the cross member with the floor girders in a manner permitting the floor girders to be relatively displaceable in a vertical direction, wherein each of the floor girders is provided with a respective lifting mechanism, said lifting mechanisms being located on opposite sides of the piston rod and on the goaf side of said cross member, and a slide plate positioned between the two floor girders to provide an abutment for the lifting mechanisms, the arrangement being such that the lifting mechanisms can be operated in engagement with the slide plate to lift one of the floor girders relative to the other floor girder.
Dependencies are inferred from the claim text.