| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a spill pipe in a power working machine which can suppress closing of an orifice due to a foreign matter, such as sand. <P>SOLUTION: In the spill pipe 64 which is used in a power working machine 10 provided with a liquid tank 18 to store liquid; and a liquid tank 14 sucking and discharging liquid in the liquid tank 18 and in which an orifice 62 to return spill from the liquid pump 14 to the liquid tank 18 is formed, the spill pipe is featured such that a protrusion part 72 is formed on a surface 70 on the side, in which the spill flows, of a part where the orifice 62 is formed, and the inflow opening of the orifice 62 is situated on the vertex of a protrusion part 72. In this constitution, since the inflow opening of the orifice 62 is situated on the vertex of the protrusion part 72 and a foreign matter, such as sand, is concentrated to the surroundings of the protrusion part 72, the possibility that the foreign matter flows in the orifice 6 is reduced to a low value. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
