公开(公告)号：JPS645558A

公开(公告)日：1989-01-10

申请号：JP10984488

申请日：1988-05-02

Applicant: ABBOTT LAB

Inventor： JIYON PASUTOROONE ,  EDOWAADO REENEN ,  REERANDO DEI SHIYAMUNESU ,  JIYOOJI FUERINGAMU ,  UORUTAA ERU JIMISON

IPC: F04B43/02 ,  A61M1/00 ,  A61M5/142 ,  F04B49/03

Abstract: PURPOSE: To easily manufacture a pump cassette at a relatively low cost by forming it with a nearly hard or solid surface member, a hard or solid back member, and an elastomer diaphragm arranged between both members. CONSTITUTION: A surface member 12 is provided with a plunger opening 18 having an elastomer member 16 spread across it. A back member 14 is provided with an expanded recess 20 on the back of the plunger opening 18 to form a plunger chamber 22. When a fluid is to be pumped out from the chamber 22, a diaphragm crossing the opening 18 via the reciprocating motion of the plunger 24 in the opening 18 is thrust into or out of the chamber 22. When the plunger 24 is excited against the diaphragm, a pump chamber outlet valve actuator 26 is opened, a pump chamber inlet valve actuator 28 is closed, and the fluid is sent out from the chamber 22 via a cassette outlet 30.