| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve sealing action by improving a piston pump. SOLUTION: A seal ring 50 has two annular seal sections 52, 54, 56, 58 positioned across an interval from each other in the axial direction, the piston pump 10 has a fluid conduit 66, and the fluid conduit 66 connects intermediate chambers 60, 62 among both seal sections 52, 54, 56, 58 of the seal ring 50 with a collection part 68 of fluid to be fed under pressure by the piston pump 10.</p> |
