| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle put into the water for jetting pressurized water while increasing the amount of the surrounding water to be sucked from the sucking holes arranged on the nozzle to the inside of the nozzle. SOLUTION: The nozzle is constituted so that a spouting flow passage 14 is communicated with an inflow passage 12 to be connected to a pressurized water supplying pipe while an orifice 13 is interposed between them, a pair of sucking holes 18A, 18B each having a round shape in the cross section are arranged oppositely to each other on the peripheral wall of the passage 14 at the positions proximate to the orifice 13. Jetting water of the volume increased by involving the surrounding water in the passage 14 from the holes 18A, 18B by the negative pressure generated by the jetting water current passing through the passage 14 is jetted underwater from a jetting hole arranged at the tip of the passage 14.
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