Title:
【発明の名称】流量精密制御ポンプ
Document Type and Number:
Japanese Patent JP3111790
Kind Code:
B2
Abstract:
In a pump in which dual plunger is reciprocated with cams attached to the rotating shaft of a motor, the delivery pressure of liquid is measured during a certain period in each cycle of the pump. By setting the pressure during the certain period as a standard pressure value, the motor is controlled so that the delivery pressure during the remaining period in each cycle approaches to the standard pressure value. In this pump, rotating-speed-priority control and pressure-priority control are alternatingly performed to decrease pulsation during delivering liquid.
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Inventors:
Kenichiro Takahashi
Hironori Kaji
Kaoru Hagiya
Hironori Kaji
Kaoru Hagiya
Application Number:
JP1146094A
Publication Date:
November 27, 2000
Filing Date:
February 03, 1994
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F04B11/00; F04B49/00; F04B49/06; G01N30/32; G05D13/32; G05D16/20; (IPC1-7): G01N30/32; F04B49/00; F04B49/06
Domestic Patent References:
| JP4182111A |
Attorney, Agent or Firm:
Yasuo Sakuta