Patent ID: 7097697

Claim:
A fuel vapor treatment device comprising: a casing having a charge port connected to a fuel tank, a purge port connected to an intake side of an engine, and an atmospheric air port through which atmospheric air is introduced; fuel vapor adsorbing material filled in the casing; a filter disposed in the casing and between the atmospheric air port and the fuel vapor adsorbing material to trap dust contained in atmospheric air; and a baffle plate disposed in the casing and between the atmospheric air port and the filter, and located generally parallel with a surface of the filter which surface faces the baffle plate so that atmospheric air introduced through the atmospheric air port strikes against the baffle plate to change its flow into a generally radial direction, the baffle plate being free of holes, wherein an annular space is formed around the baffle plate so that atmospheric air from the baffle plate flows through the annular space to the filter.