Abstract: A cutting arrangement which includes a cutting roller whereby a spray liquid supply is controlled by a forces acting on the cutting roller. The cutting roller includes a nozzle holder which functions to inhibit or block the flow of the spray liquid and, when the roller cutter or cutting blade is in operation, a deflecting spring element causes the nozzle holder to tilt thereby releasing a spray liquid to the spraying nozzle.

Abstract: In a cutting roller, preferably for a winning machine and provided with a plurality of picks on its blade and with a number of fluid-spraying nozzles for cooling the picks, each nozzle is screwed into a nozzle-receiving member into which a shutoff valve is inserted which opens the bore in the nozzle-receiving member for connecting the passage for supplying fluid with the nozzle when the latter is inserted into that bore or automatically blocks that bore when the nozzle is removed from that bore.

Abstract: A cutting roller for a winning machine, which includes a tubular support and a number of helical blades on the tubular support provided with cutting picks arranged on the periphery of each blade, is provided with a hydraulic fluid spraying system which comprises a circumferential fluid distribution passage formed in the blade, connecting passages leading to the spraying nozzles and a radial bridging passage connecting the fluid distribution passage with the connecting passages. The fluid distribution passage and the bridging passage are grooves which accommodate plastic fluid-conducting tubes. The grooves are covered with covers of non-corrossive material which are releasably connected to the walls of the blade.

Abstract: A cutting roller for a mining machine is provided with an arrangement for dust depositing and cooling cutter bits disposed on the cutting roller. The arrangement includes Venturi nozzles mounted in a closure ring enclosing the front end of the cutting roller, which closure ring faces the workings of a mineral to be processed. Spraying liquid supplied to the Venturi nozzles is discharged therefrom in strong jets directed to the workings and deflected therefrom to form branches of spraying liquid mist flowing around the cutting roller. The spraying liquid mist enriched with dust is sucked into the cutting roller and flows back to the nozzles where it is mixed with the freshly supplied spraying liquid.

Abstract: A cutting roller for a mining machine, having a substantially conical closure member arranged to face the workings and a tubular body member which has a larger diameter at the end nearer the working face than at the discharge end. The tubular member carries at least one cutting blade, and the closure member mounts at least one cutting blade; each blade is provided at its edge region with a plurality of bit holders for the attachment of cutter bits. The outer surface of the body member merges into the substantially conical closure member in a smooth, even curve, so that the outside diameter of the body member in the region of the working face is substantially greater than the diameter in the region of the discharge end of the cutting roller. The roller is provided with liquid distribution channels on each cutting blade, which channels are connected to a single liquid distribution ring channel in the region of the substantially conical closure member.

Abstract: A spraying nozzle for a cutting roller for underground mining, which is located in the vicinity of the cutting bit provided on the blade or closure ring of the roller, has a nozzle shield enclosing the nozzle and coaxially mounted therewith on the respective blade or closure ring of the roller. The nozzle shield is formed with a recess to receive the head of the nozzle and has an upper surface sloping in a direction opposite to the direction of rotation of the cutting roller to reduce wear of the nozzle shield subject to flowing abrasive mineral mined.

Abstract: A cutting roller for a mining machine including a closure ring arranged to face the workings and a tubular body member carrying a plurality of helical blade coils provided with bit holders furnished with cutting bits. The cutting roller has a number of charging coils arranged on the outer surface of the body member and extending midway of the blade coils and in parallel thereto. All the charging coils extend about the outer surface of the body member with an equal angle of inclination.

Abstract: A cutting drum for an extracting machine is assembled of a base body having a frustoconical configuration and of an end ring which is detachably mounted to the major end face of the base body. The jacket surfaces of the end ring and of the base body have the same slope so that no jump will result in the separation plane. The connecting means are in the form of radial flanges connected by bolts and provided with centering elements.