Device for cooling the bits of a cutting machine

Details Device for cooling the bits of a cutting machine Device for cooling the bits of a cutting machine

E - Fixed Constructions

21

C

262/82

E21C 35/18 (2006.01) E21C 35/187 (2006.01)

Patent

CA 1177498

ABSTRACT OF THE DISCLOSURE For cooling the bits of a cutting machine, nozzles for cooling water are provided. The bit is supported for axial movement and may when being loaded exert a stroke for the path-in the direction of the cutting pressure. A coupling member transmits the movement of the bit to a shutoff valve blocking the supply of water in unloaded condition of the bit and freely supplies the supply of water whenever a pre- determined cutting pressure is exceeded. The restoring force of the bit to return the same in its starting position in unloaded condition is provided by a spring and by the water pressure and is rated in correspondence with the minimum value of the cutting pressure. The restoring spring is supported against an adjustable abutment which can be fixed in position during operation so that the restoring force can be adjusted.

404396

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