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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/042746
Kind Code:
A non-pulsation pump (100) is provided with: a cam mechanism (16) that converts the rotational motion of a shared motor (11) into reciprocal motion having a prescribed phase difference; a plurality of cross heads (28, 48) that make reciprocal motion with a prescribed phase difference through the cam mechanism (16); and a plurality of reciprocating pumps (20, 40) that are driven with a prescribed phase difference and that include plungers (26, 46) connected to the cross heads (28, 48), wherein the total discharge flowrate toward a shared discharge pipe 36 is kept constant. This non-pulsation pump includes a preliminary compression step for moving the plungers (26, 46) of the reciprocating pumps (20, 40) to a discharge side by very small amounts before a discharging step but after a suction step, and has a stroke adjustment mechanism (80) for adjusting the effective stroke length of the plunger (26) in the preliminary compression step. Thus, generation of pulsation can be suppressed even when the set pressure changes.

MURAKOSHI Fusao (NIKKISO CO. LTD., 2-16-2, Noguchi-cho, Higashimurayama-sh, Tokyo 20, 〒1898520, JP)
SATO Hideaki (NIKKISO CO. LTD., 2-16-2, Noguchi-cho, Higashimurayama-sh, Tokyo 20, 〒1898520, JP)
Application Number:
Publication Date:
March 08, 2018
Filing Date:
April 12, 2017
Export Citation:
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NIKKISO CO., LTD. (4-20-3, Ebisu Shibuya-k, Tokyo 22, 〒1506022, JP)
International Classes:
F04B11/00; F04B9/04; F04B13/00
Foreign References:
Other References:
See also references of EP 3508721A4
Attorney, Agent or Firm:
YKI PATENT ATTORNEYS (1-34-12, Kichijoji-Honcho Musashino-sh, Tokyo 04, 〒1800004, JP)
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