A hydraulic unit for use with dust suppression nozzles in coal mines

摘要

654,567. Dust suppression ; water supplying. MORRIS, C. Dec. 2, 1948, No. 31204. [Classes 68 (i) and 85] [Also in Groups I and XXIX] A combined hydraulic unit for use with dust suppression nozzles in mines comprises a high pressure stop valve A at the inlet, a large capacity filter B and a pressure reducing valve D from which the water is delivered at a reduced pressure.