Patent ID: 8308453

Claim:
A diaphragm pump, comprising: a pump chamber including a flexurally vibrating type diaphragm vibrator as a wall panel; a plurality of inlet ports and a plurality of outlet ports provided in said pump chamber; a check valve provided at one of said plural of inlet ports and one of said plurality of outlet ports respectively, to thereby convey a fluid by pumping action of intake and discharge caused by vibration of said diaphragm vibrator; a valve main plate including said plurality of inlet ports and said plurality of outlet ports; an incoming fluid splitting plate including an incoming fluid splitting orifice that splits an incoming fluid toward said plurality of inlet ports, and a second outlet port communicating with said plurality of outlet ports; and an inlet/outlet port plate including a second inlet port communicating with said incoming fluid splitting orifice of said incoming fluid splitting plate, and a third outlet port communicating with said outlet port of said incoming fluid splitting plate; wherein at least one of said plurality of inlet ports is located at a central portion of said pump chamber, and said plurality of outlet ports is located in a vicinity of a peripheral portion of said pump chamber, and wherein said valve main plate, said incoming fluid splitting plate and said inlet/outlet port plate are adhered to each other such that the valve main plate is located above the incoming fluid splitting plate and the incoming fluid spitting plate is located above the inlet/outlet port plate.