To provide a piston pump for pressure-transporting fluid at a constant flow rate with the forward and backward movement of a piston while securing a sliding property and sealing performance, having simple construction for reducing manufacturing cost and running cost.
In a cylinder 5 at an opposite portion 18 opposite to the piston 3 when the piston 3 is arranged at an upper dead center and also arranged at a lower dead center, a partitioning seal member 19 is provided to be put in close contact with the outer peripheral face of the cylinder 5 and the outer peripheral face of the piston 3. The piston 3 does not slide with the inner peripheral face of the cylinder 5 but slides with the partitioning seal member 19. Thus, it is only required to secure the machining accuracy of a sliding portion of the piston 3 with the partitioning seal member 19. As a result, the machining accuracy required for the inner peripheral face of the cylinder 5 can be reduced.
CHO SHUNGYO
BABA KAZUHIRO
MYOJIN AKIRA
| JPH05272457A | 1993-10-19 | |||
| JPH07217551A | 1995-08-15 | |||
| JP2002147344A | 2002-05-22 |
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