公开(公告)号：WO1995002190A1

公开(公告)日：1995-01-19

申请号：PCT/US1994007506

申请日：1994-07-06

Applicant: BAXTER DIAGNOSTICS INC.

Inventor： BAXTER DIAGNOSTICS INC. ,  JONES, Donald

IPC: G01N35/00

CPC classification number: G01N35/0099 ,  G01N35/1002 ,  Y10T436/11 ,  Y10T436/113332

Abstract: A chemical analyser (10) includes a fluid dispensing system (46) with a carrier member (18) and fluid dispensing head (72). The carrier member (18) includes a docking fixture (52) and the fluid dispensing head includes a docking receptacle (54). By engagment of the docking fixture and receptacle the carrier member carries the fluid dispensing head to a position above a recess (34) into which fluid is precisely dispensed. The carrier member also returns the fluid dispensing head to a storage location (64) substantially separating the fluids to be dispensed from the environment of the analyzer. When the fluid dispensing head is in its storage location the carrier member may disengage to perform other functions in the analyzer.

Abstract translation: 化学分析器（10）包括具有载体构件（18）和流体分配头（72）的流体分配系统（46）。 承载构件（18）包括对接固定件（52），并且流体分配头包括对接插座（54）。 通过接合对接固定件和容器，承载构件将流体分配头运送到凹槽（34）上方的位置，精确地分配流体。 载体构件还将流体分配头返回到基本上将待分配的流体与分析器的环境分离的存储位置（64）。 当流体分配头处于其存储位置时，承载构件可以脱离以在分析器中执行其它功能。

公开(公告)号：WO1995001839A1

公开(公告)日：1995-01-19

申请号：PCT/US1994007507

申请日：1994-07-06

Applicant: BAXTER DIAGNOSTICS INC.

Inventor： BAXTER DIAGNOSTICS INC. ,  JONES, Donald

IPC: B01L11/00

CPC classification number: B01L3/0293 ,  Y10T137/2579 ,  Y10T137/2642

Abstract: A precision liquid reagent fluid dispensing apparatus (10) and method includes a continuously operating pump (16) inducting and pressurizing ambient air. The pressurized air is delivered at a first location into a flow-through volume (18) with provision to substantially completely abate at a second location any noncontinuous air flow or air pressure variations from the pump. A long-lived pressure sensor (32) which is substantially free of drift is associated with the flow through volume at a third location and provides a signal indicative of sensed air pressure. A controller (36) by reference to a calibration standard for the sensor provides a time-variant control signal in response to the sensed air pressure. At a fourth location a duty cycle valve (38) vents pressurized air from the flow through volume in response to the control signal to provide at the second location a precisely regulated dispensing air pressure. The dispensing air pressure is applied via a reagent liquid container (46) and closure member (62) to a liquid reagent to pressurize this reagent for dispensing at a precise rate via a dispensing valve (82). The dispensing valve is sealingly carried by the closure member to reduce leakage paths and corrosion opportunities in the apparatus of the present invention.

Abstract translation: 精密液体试剂流体分配装置（10）和方法包括对环境空气进行感应和加压的连续运行的泵（16）。 加压空气在第一位置处被输送到流通体积（18）中，其设置成在第二位置基本上完全减轻与泵不连续的气流或气压变化。 基本上没有漂移的长寿命压力传感器（32）与在第三位置处的流量相关联并且提供指示感测到的空气压力的信号。 参考传感器的校准标准的控制器（36）响应于感测到的空气压力而提供时变控制信号。 在第四位置，响应于控制信号，占空比阀（38）从加压空气排出流量，以在第二位置提供精确调节的分配空气压力。 分配空气压力经由试剂液体容器（46）和封闭构件（62）经由分配阀（82）以精确的速率施加到液体试剂以加压该试剂。 分配阀由封闭构件密封地承载，以减少本发明装置中的泄漏路径和腐蚀机会。