Patent ID: 8617299

Claim:
A canister comprising: a case having a tank port communicating with an upper gaseous-phase space within a fuel tank, a purge port communicating with an intake air passage of an engine, and an atmospheric port communicating with an atmosphere, wherein: the case further includes: an adsorption material chamber communicating between the tank port and the purge port and storing a first adsorption material therein, the first adsorption material being capable of adsorbing fuel vapor and allowing the fuel vapor from being desorbed, an atmospheric communication chamber communicating between the atmospheric port and the adsorption material chamber, so that air can flow through the atmospheric communication chamber in an air flowing direction; and a partitioning member disposed within the atmospheric communication chamber and extending along the air flowing direction, so that the atmospheric communication chamber is divided into an air flow passage and an adsorption material passage; wherein the partitioning member has a tubular shape and includes a plurality of gas passage holes dispersively formed in the partitioning member and extending therethrough in a diametrical direction to allow passage of gas-through the partitioning member in a direction intersecting with the air flowing direction, and wherein the air flow passage and the adsorption material passage are defined on a radially inner side and a radially outer side of the partitioning member, respectively; wherein the air flow passage allows passage of air therethrough; wherein the adsorption material passage has a second adsorption material stored therein; and wherein the second adsorption material can adsorb fuel vapor and allow desorption of the fuel vapor; wherein the air flow passage and the adsorption material passage are arranged parallel to each other with respect to the air flowing direction.