Patent ID: 7806103

Claim:
An integrated valve device comprising: a casing having a plurality of passage portions each defining therein a fluid passage; a plurality of valves each accommodated in a respective one of the plurality of passage portions and being adapted to open and close the respective fluid passage; and a shaft adapted to simultaneously manipulating positions of the plurality of valves, wherein each of the plurality of valves has two sidewall surfaces with respect to a rotation axis thereof, each of the plurality of valves substantially closes the fluid passage when in a full close position, each of the plurality of valves substantially entirely opens the fluid passage when in a full open position, each of the plurality of passage portions has a pair of wall portions each opposed to a corresponding one of the two sidewall surfaces of each of the plurality of valves throughout an open-close range between the full close position and the full open position, and each of the pair of wall portions has an integrally formed protrusion for supporting a corresponding one of the plurality of valves by being in direct contact with a corresponding one of the sidewall surfaces when the protrusions of the pair of wall portions receive there between the respective one of the plurality of valves, each said protrusion having a thickness greater than a thickness of said respective wall portion around the protrusion.