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    • 116. 发明公开
    • System and method for dispensing metered quantities of a fluid
    • 系统和Verfahren zur Abgabe von abgemessenenFlüssigkeitsmengen。
    • EP0248514A1
    • 1987-12-09
    • EP87303044.9
    • 1987-04-08
    • TECHNICON INSTRUMENTS CORPORATION(a Delaware corporation)
    • Uffenheimer Kenneth F.Negersmith, Kent M.
    • G01F11/08
    • G01F11/08
    • A fluid delivery system (10) and method for dispensing precisely metered quantities of a fluid, comprising fluid supply means (16); pump means (22); a conduit (14) interconnecting said fluid supply means and pump means; a first valve (18) in said conduit positioned intermediate said fluid supply means and pump means; a nozzle (28) for discharging said fluid from said system; a further conduit (24) connecting said nozzle with said pump means and with said conduit; a second valve (26) in said further conduit; means (44) for selectively applying a vacuum and a superatmospheric pressure to said pump means; and control means (50) operatively interconnecting said first and second valves and said selective pressure applying means for aspirating predetermined quantities of fluid from said fluid supply means through said 'conduit to said pump means and thereafter conveying said quantities of fluid from said pump means to said nozzle, the system being so arranged as to cause formation of a fluid flow-occluding air bubble in said nozzle upon termination of discharge of fluid from said nozzle so as to inhibit discharge of residual droplets of said fluid from said nozzle.
    • 一种用于分配精确计量的流体的流体输送系统(10)和方法,包括流体供应装置(16); 泵装置(22); 将所述流体供应装置和泵装置相互连接的导管(14) 所述管道中的位于所述流体供应装置和泵装置之间的第一阀门(18) 用于从所述系统排出所述流体的喷嘴(28); 连接所述喷嘴与所述泵装置和所述导管的另一管道(24); 所述另一导管中的第二阀(26) 用于选择性地向所述泵装置施加真空和超大气压的装置(44); 以及控制装置(50),其可操作地将所述第一和第二阀和所述选通压力施加装置相互连接,用于通过所述导管从所述流体供应装置抽吸预定量的流体到所述泵装置,然后将所述数量的流体从所述泵装置输送到所述 喷嘴,所述系统被布置成在从所述喷嘴排出流体终止时在所述喷嘴中形成流体阻塞气泡,以便抑制所述流体从所述喷嘴的残留液滴的排放。