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Title:
LIQUID CHROMATOGRAPH
Document Type and Number:
WIPO Patent Application WO/2019/151062
Kind Code:
A1
Abstract:
Provided is a liquid chromatograph in which a solvent can be quickly replaced in a liquid delivery pump. The liquid chromatograph is provided with a liquid delivery pump 1 that takes in and discharges a solvent, and the liquid delivery pump is provided with: a pump head 111 in which an intake passage 10, a pressurizing chamber 12, and a discharge passage 103 are formed; a plunger 2; and a seal 61 that seals the pressurizing chamber. The liquid chromatograph 100 is configured such that a bottom dead center 21 of the plunger is disposed nearer to the upper end of the pressurizing chamber than the intake passage. The bottom dead center of the plunger may be disposed such that an upper surface of the plunger and a surface of the intake passage at the lower-end side of the pressurizing chamber are substantially the same.

Inventors:
TSUKADA Nobuhiro (24-14 Nishi Shimbashi 1-chome, Minato-k, Tokyo 17, 〒1058717, JP)
OGATA Izumi (24-14 Nishi Shimbashi 1-chome, Minato-k, Tokyo 17, 〒1058717, JP)
ITO Shinya (24-14 Nishi Shimbashi 1-chome, Minato-k, Tokyo 17, 〒1058717, JP)
TOBITA Midori (24-14 Nishi Shimbashi 1-chome, Minato-k, Tokyo 17, 〒1058717, JP)
Application Number:
JP2019/001963
Publication Date:
August 08, 2019
Filing Date:
January 23, 2019
Export Citation:
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Assignee:
HITACHI HIGH-TECHNOLOGIES CORPORATION (24-14, Nishi Shimbashi 1-chome Minato-k, Tokyo 17, 〒1058717, JP)
International Classes:
F04B49/12; F04B13/00; F04B53/14; F04B53/16; G01N30/32
Domestic Patent References:
WO2011090188A12011-07-28
Foreign References:
JP2007113439A2007-05-10
JP2004150402A2004-05-27
JPH05149242A1993-06-15
Attorney, Agent or Firm:
IWASAKI Shigemi (24-14 Nishi Shimbashi 1-chome, Minato-k, Tokyo 17, 〒1058717, JP)
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