Abstract: A cutting implement for a mining machine includes a chisel and a holder for the chisel. The chisel has a flange which abuts the holder and is provided with a first recess. The holder has a second recess which registers with the first recess and communicates with a water supply channel in the holder. The second recess accommodates a hollow cylindrical seal. A tubular element bridges the two recesses and has a portion of smaller diameter which is received by the seal and a portion of larger diameter which is located in the first recess and confines the seal. The portion of larger diameter is embraced by a cap, and the cap carries a nozzle which is arranged to spray the cut made by the chisel. The seal, tubular element, cap and nozzle are all recessed from the outer peripheral surface of the chisel.

Abstract: A flanged joint for connecting sheet material air channel sections of essentially rectangular cross section to one another has flanges made of hollow sheet material shapes and steel angle pieces. Each of the hollow sheet material shapes is provided with projections and/or depressions in one or more of the walls which entirely or partially surround a leg of a respective steel angle piece. Each leg of a steel angle piece, in turn, is provided with projections and/or depressions which are disposed at the periphery of the leg and are adjusted to the positions of the projections and/or depressions in the hollow sheet material shapes. At least one of the projections then catches in at least one of the depressions upon pushing a leg of a steel angle piece into a hollow sheet material shape.