| 摘要 |
PROBLEM TO BE SOLVED: To provide a new structure piston pump using a flexible member in a part of a liquid pumping action mechanism and suitable for pumping solid and liquid mixture, but not easily generating strength deterioration caused by repeated deformation of the flexible member even in a long term usage. SOLUTION: In the air piston pump, each of a first, a second and a third air bag 34A, 34B, 34C arranged along a fluid flow passage 32 in an order takes a block condition where the same projects in the fluid flow passage by supply of pressurized air and blocks the fluid flow passage and an open condition where the same retreats from the fluid flow passage by discharge of pressurized air and opens the fluid flow passage. Opening and closing timing of a supply side opening/closing valve 39 and a discharge side opening/closing valve 41 provided in a pressurized air supply piping 38 and a pressurized air discharge piping 40 connected to the first-third air bag respectively is set by a control means, and the air bag in the opend state adjoining an air bag in a blocked state shifts in the order of the first to third air bag. COPYRIGHT: (C)2006,JPO&NCIPI
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