| 摘要 |
A fluid pump includes a chamber and a plunger extending into the chamber and supported for sliding movement on a suction stroke to introduce fluid into the chamber and on a discharge stroke to force fluid out of the chamber. A driver slides the pumping member in opposite directions. A seal ring is located between the chamber and the pumping member and permits the sliding movement of the pumping member. The seal ring has an outer annular portion having a generally flat cross-section, clamped in a wall of the chamber and an inner annular portion having a bulbous cross-section and in sliding sealing engagement with the pumping member.
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