| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel tank cap preventing exposure of fuel in a fuel tank to the outside. <P>SOLUTION: A cap body 6 is constituted of an outer plate 4 and an inner plate 5, an air chamber 8 and a vent hole 9a are provided between the outer plate 4 and the inner plate 5, and a center part of the inner plate 5 is configured as an upper and lower double wall structure further forming a secondary air chamber 13 in an intermediate part. An upper part communication hole 12 communicating with the air chamber 8 is provided in the center of an upper wall portion 7a, a lower part communication hole 17 facing a direction crossing an extension of a center line of the upper part communication hole 12 is provided in a lower wall portion 15c, and a filter 18 is disposed in the secondary air chamber 13. <P>COPYRIGHT: (C)2012,JPO&INPIT |
