Ramming device for the winning of coal in longwall face galleries by an impact method

摘要

977,747. Mineral-mining apparatus. GEWERKSCHAFT EISENHUTTE WESTFALIA. May 15, 1962 [May 25, 1961], No. 18643/62. Heading E1F. In an impacting plough structure provided with mineral-detaching tools at either end on the side of the structure adjacent to the face additional detaching tools are pivotally mounted on the structure about an axis parallel to the direction of movement of the structure that the tools can be swung from an inoperative position to an operative position as required. The tools 19 and tool 20, if required, are mounted on a plate 18 hinged at 17 on the upper plate 11 of the structure. When the plate 18 is swung down from the operative to an inoperative position against the plate 11 the plate 18 locks the support arms 21 against the plate 11. A recess 25 in the plate allows stowage therein of a further detaching tool-carrying plate 24.