Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1979-06-12
1981-09-08
Murtagh, John E.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
248354R, 410 58, 198517, E04H 1234, F16M 1300
Patent
active
042876923
ABSTRACT:
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.
REFERENCES:
patent: 2355867 (1944-08-01), Jarvis
patent: 2380069 (1945-07-01), Peterson
patent: 2916238 (1959-12-01), Fahland
patent: 3362116 (1968-01-01), Erickson
patent: 3536282 (1970-10-01), Ferris
Alexander Clifton E.
Ford Thomas R.
Smith William S.
Murtagh John E.
Peabody Coal Company
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