E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
262/83
E21C 35/187 (2006.01)
Patent
CA 1126766
Abstract This invention relates to an arrangement for cooling the cutter teeth of a cutting tool preferably a rotary cutter head, of a rock-gutting machine, which cutter teeth are only temporarily in engagement with the rock to be cut, and for cooling the breast, by means of nozzles which are mounted on the cutting tool and associated with respective cutter teeth and are supplied with water without an admixture of air. In order to save water, a discharge of water from a nozzle is to be restricted to the time in which the associated cutter tooth engages the breast. For this purpose the cutter teeth are axially slidably mounted in tooth holders and are resiliently biased substantially in the direction of the cutting pressure. As a cutter tooth is displaced under the action of the cutting pressure, a valve is opened which is upstream of the nozzle that is associated with the cutter tooth concerned. As a result, water is discharged from that nozzle as long as the associated cutter tooth is subjected to the cutting pressure.
332967
Schetina Otto
Wrulich Herwig
Zitz Alfred
Mcfadden Fincham
Voest - Alpine Aktiengesellschaft
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