Liquid feed pump and liquid chromatography device

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United States of America Patent

PATENT NO 11859600
SERIAL NO

17427754

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Abstract

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A liquid feed pump which increases the liquid flow velocity in a stagnation area in the pressure chamber of a plunger pump, thereby improving the liquid replacement speed in the plunger pump. When the liquid in the liquid feed pump is replaced, a first plunger slides back and forth in the space between a lower limit point and an upper limit point, and the second plunger stops at least temporarily at a position near to the upper limit point or slides back and forth for a shorter distance than when the liquid feed pump usually feeds the liquid.

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Patent Owner(s)

Patent OwnerAddress
HITACHI HIGH-TECH CORPORATION17-1 TORANOMON 1-CHOME MINATO-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akieda, Daisuke Tokyo, JP 28 57
Ito, Shinya Tokyo, JP 126 790
Nishiki, Kenichiro Tokyo, JP 9 6
Tsukada, Nobuhiro Tokyo, JP 20 201

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