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US 4,287,692 AGranted
Safety apparatus for a mining machine
AssigneePeabody Coal Company
InventorsClifton E. Alexander, Thomas R. Ford, William S. Smith
Life of this patent
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AssigneePeabody Coal Company
InventorsClifton E. Alexander, Thomas R. Ford, William S. Smith
Estimating the term…
Safety apparatus for a mining machine having a gathering head for gathering product (e.g., coal) in a mine, a conveyor system which extends rearwardly along the machine from the gathering head for conveying the product rearwardly for discharge at the rear of the machine, and power generating equipment for driving the conveyor system and the gathering head. The conveyor system comprises an elongate conveyor support or structure pivotally mounted for swinging movement about a horizontal axis extending transversely of the machine between lowered and raised positions. The machine has a frame having a rear bottom section below the conveyor support and sides extending upwardly from the rear bottom section. Hydraulic lift means is provided between the rear bottom section and the support powered by the power equipment for pivoting the support. Access is provided between the support and the rear bottom section, when the support is raised, for personnel servicing machine components located in this area. A pair of struts is provided each pivotally mounted on the rear bottom section for pivotal movement about an axis extending longitudinally of the machine between a lowered storage position wherein they extend outwardly in the direction toward the sides of the frame and a raised supporting position. With the struts in their supporting position, their upper ends are engageable by the support so that, if hydraulic pressure is lost during maintenance operations, downswing of the support and thus injury to personnel servicing the machine components beneath the support is prevented.
Safety apparatus for a mining machine having a frame and an elongate structure pivotally mounted for swinging movement on the frame about a horizontal axis extending transversely of the macine, hydraulic lift means between the frame and said pivoted elongated structure for raising and lowering it, access being provided between the frame and said structure when said structure is raised for personnel servicing machine components underneath said structure;
Safety apparatus for a mining machine having a frame and an elongate structure pivotally mounted for swinging movement on the frame about a horizontal axis extending transversely of the machine, hydraulic lift means between the frame and said pivoted elongated structure for raising and lowering it, access being provided between the frame and said structure when said structure is raised for personnel servicing machine components underneath said structure;
Safety apparatus for a mining machine having a frame and an elongate structure pivotally mounted for swinging movement on the frame about a horizontal axis extending transversely of the machine, hydraulic lift means between the frame and said pivoted elongated structure for raising and lowering it, access being provided between the frame and said structure when said structure is raised for personnel servicing machine components underneath said structure;
Dependencies are inferred from the claim text.