公开(公告)号：JPH0510274A

公开(公告)日：1993-01-19

申请号：JP5164492

申请日：1992-03-10

Applicant: ABBOTT LAB

Inventor： RANDOORU AARU YANGUSU ,  GARIERUMO PII PARUDEINASU

IPC: F04B13/00 ,  F04B49/06 ,  F04B49/20

Abstract: PURPOSE: To meter and distribute precision volume of fluid from a plurality of output ports formed continuously on a metering pump piston, and balance the fluid discharged from the plurality of output ports irrelative of pressure difference in a working chamber of the piston. CONSTITUTION: Speed of rotation of a rotary piston is controlled when the rotary piston of a metering pump cycles sequentially from an input port of a pump to a first output port, a second output port and again the input port repeatedly. The angular position of the piston is monitored and signal is generated in correspondence with the movement to the selected angles of rotation of the piston. Enable signal is produced for generating pump cycle. The pump piston rotates in a first direction at a first controlled speed in correspondence with the enable signal. A second control signal is generated in correspondence with a monitor signal and the speed of rotation of the piston is changed into a second controlled speed.