Plunger pump
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United States of America Patent
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Jul 14, 2020
Grant Date -
Aug 3, 2017
app pub date -
Jan 24, 2017
filing date -
Feb 1, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A plunger pump includes a cylinder section having a cylinder chamber and a spacer section sliding against a portion of the plunger closer to a proximal end side than a portion of a plunger advancing and retracting into the cylinder chamber. The cylinder section is made of a material having first hardness, and the spacer section being made of a resin material having second hardness softer than the first hardness. A length in an axial direction from a proximal end of a sliding portion of the spacer section sliding against the plunger to a distal end of the spacer section is larger than a maximum stroke length of reciprocation of the plunger.
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