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Title:
PUMP FOR LIQUID CHROMATOGRAPH, AND LIQUID CHROMATOGRAPH
Document Type and Number:
WIPO Patent Application WO/2012/014741
Kind Code:
A1
Abstract:
A pump controller controls a first plunger pump and a second plunger pump connected in series or in parallel in a manner such that the plunger pumps alternately perform an inhalation and compression movement at a roughly constant cycle. Moreover, the pump controller sets the compression chamber of at least one of the plunger pumps to have a higher pressure than the other and controls the flow rate by adjusting the amount of lift of the first plunger and the second plunger. As a consequence, it is possible to provide a liquid chromatograph and a pump for a liquid chromatograph such that it is possible to reduce the pulsation even when the discharge flow rate is varied.

Inventors:
TOKUO Kenichiro (HITACHI LTD., 1-1, Omikacho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
徳尾 健一郎 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
HIRAKU Kenji (HITACHI LTD., 1-1, Omikacho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
平工 賢二 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
KAJI Hironori (1040 Oaza Ichige, Hitachinaka-sh, Ibaraki 33, 〒3120033, JP)
加地 弘典 (〒33 茨城県ひたちなか市大字市毛1040番地 株式会社日立ハイテクマニファクチャ&サービス内 Ibaraki, 〒3120033, JP)
Application Number:
JP2011/066421
Publication Date:
February 02, 2012
Filing Date:
July 20, 2011
Export Citation:
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Assignee:
HITACHI HIGH-TECHNOLOGIES CORPORATION (24-14, Nishi Shimbashi 1-chome Minato-k, Tokyo 17, 〒1058717, JP)
株式会社日立ハイテクノロジーズ (〒17 東京都港区西新橋一丁目24番14号 Tokyo, 〒1058717, JP)
TOKUO Kenichiro (HITACHI LTD., 1-1, Omikacho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
徳尾 健一郎 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
HIRAKU Kenji (HITACHI LTD., 1-1, Omikacho 7-chome, Hitachi-sh, Ibaraki 92, 〒3191292, JP)
平工 賢二 (〒92 茨城県日立市大みか町七丁目1番1号 株式会社日立製作所 日立研究所内 Ibaraki, 〒3191292, JP)
KAJI Hironori (1040 Oaza Ichige, Hitachinaka-sh, Ibaraki 33, 〒3120033, JP)
International Classes:
G01N30/32; F04B13/00; F04B49/06; G01N30/34
Attorney, Agent or Firm:
HIRAKI Yusuke (Kamiya-cho MT Bldg. 19F, 3-20 Toranomon 4-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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Claims: