| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent ingress of rain inside a casing of an engine-driven working machine, and to reduce leakage of noise such as engine noise outside the casing. <P>SOLUTION: A louver structure of a vent 3 includes inner and outer louver layers 30, 40 which are arranged symmetric to and opposite to each other. A V-shaped vent passage is formed between the inner and the outer louvers, and a space is formed between a lower end of the outer louver and a lower end of the inner louver which are brought close to each other. The inside of the louver structure is invisible from the outside of the vent 3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
