Roof supports
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsEgon Wojaczek, Helmut Poklekowski, Klaus-Peter Reichelt
Life of this patent
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Abstract
A roof support employs an hydraulic piston and cylinder unit as an adjustment device between the goaf shield and the roof-engaging structure. The cylinder unit is mounted to the shield with the aid of a bearing body defining a cup receiving a spherical end of the cylinder. The body also has recesses accessible via offset openings in which journals projecting from the cylinder are located. Locking pieces detachably fitted to the shield block the openings to retain the journals therein yet permit easy assembly and dismantling of the unit.
Claims11
In a roof support for use in a mineral mining comprising a floor-engaging structure, a roof-engaging structure, at least one hydraulic prop, means for connecting the prop to the roof and floor-engaging structures, a goaf shield, means pivotably connecting the goaf shield to the roof-engaging structure, guide levers pivotably interconnecting the goaf-shield to the floor engaging structure and a piston and cylinder unit pivotably connected between the roof-engaging structure and the goaf shield;
- the improvement comprising means for mounting the cylinder of the unit to the goaf shield, said mounting means comprising a body rigidly secured to the goaf shield and providing a bearing socket for the cylinder, journals provided on the cylinder, recesses in said body for receiving the journals, openings in the body leading to the recesses for permitting the journals to be introduced into the recesses and withdrawn from the recesses via the openings, and separate locking means detachably secured to the goaf shield to block the openings and maintain the journals within the recesses.
Dependencies are inferred from the claim text.