Patent ID: 9579971
Date: 2017-02-28
CPC Classifications: B60K,B62J,B65D

Claim:
1. A fuel cap, said fuel cap being configured to openably and closably cover a fuel filler of a fuel tank, said fuel cap comprising: a breather valve mechanism having a valve with a spring configured to retain an internal pressure of the fuel tank up to a predetermined pressure; and a breather passage configured to communicate between the fuel tank and an atmosphere, said breather passage including the breather valve mechanism and a resonator chamber therein, the breather valve mechanism and resonator chamber forming a silencing mechanism, wherein the fuel cap further comprises a lower body and an upper body attached onto the lower body, and the breather passage before branching into the resonator chamber is formed in the lower body below the resonator chamber, and wherein the resonator chamber and the breather passage before the branching are formed so as to be vertically separated from each other with a seal member as a boundary.