专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07225683B2 Composition pulse time-of-flight mass flow sensor 有权
标题翻译：组成脉冲飞行时间质量流量传感器
公开(公告)号：US07225683B2
公开(公告)日：2007-06-05
申请号：US10661401
申请日：2003-09-11
申请人： Cindy K. Harnett , Robert W. Crocker , Bruce P. Mosier , Pamela F. Caton , James F. Stamps
发明人： Cindy K. Harnett , Robert W. Crocker , Bruce P. Mosier , Pamela F. Caton , James F. Stamps
IPC分类号： G01F1/58
CPC分类号： G01F1/7088
摘要： A device for measuring fluid flow rates over a wide range of flow rates ( 10 μL/min) and at pressures at least as great as 2,000 psi. The invention is particularly adapted for use in microfluidic systems. The device operates by producing compositional variations in the fluid, or pulses, that are subsequently detected downstream from the point of creation to derive a flow rate. Each pulse, comprising a small fluid volume, whose composition is different from the mean composition of the fluid, can be created by electrochemical means, such as by electrolysis of a solvent, electrolysis of a dissolved species, or electrodialysis of a dissolved ionic species. Measurements of the conductivity of the fluid can be used to detect the arrival time of the pulses, from which the fluid flow rate can be determined. A pair of spaced apart electrodes can be used to produce the electrochemical pulse. In those instances where it is desired to measure a wide range of fluid flow rates a three electrode configuration in which the electrodes are spaced at unequal distances has been found to be desirable.
摘要翻译：用于在宽的流量范围（<1nL / min至>10μL/ min）和至少高达2,000psi的压力下测量流体流速的装置。本发明特别适用于微流体系统。该装置通过产生流体或脉冲中的组成变化来操作，随后从创建点下游检测出流体或脉冲以导出流量。可以通过电化学方法，例如通过溶剂的电解，溶解的物质的电解或溶解的离子物质的电渗析来产生包含小的流体体积的每个脉冲，其组成不同于流体的平均组成。可以使用流体的电导率的测量来检测脉冲的到达时间，从而可以确定流体流速。可以使用一对间隔开的电极来产生电化学脉冲。在需要测量各种流体流速的情况下，已经发现其中电极以不等距离间隔开的三电极配置是期望的。

2. 发明授权

US07204264B2 High pressure capillary micro-fluidic valve device and a method of fabricating same 有权
标题翻译：高压毛细管微流体阀装置及其制造方法
公开(公告)号：US07204264B2
公开(公告)日：2007-04-17
申请号：US10941216
申请日：2004-09-15
申请人： Robert W. Crocker , Pamela F. Caton , Geoff C. Gerhardt
发明人： Robert W. Crocker , Pamela F. Caton , Geoff C. Gerhardt
IPC分类号： F15C1/04
CPC分类号： F16K99/0001 , F15C5/00 , F16K99/0003 , F16K99/0021 , F16K99/0044 , F16K2099/0074 , F16K2099/0084 , Y10T137/0402 , Y10T137/1812 , Y10T137/2196 , Y10T137/4643
摘要： A freeze-thaw valve and a method of micro-machining the freeze-thaw valve is provided and includes a valve housing, wherein the valve housing defines a housing cavity and includes a housing inlet, a housing vent, a capillary tubing inlet and a capillary tubing outlet. A valve body is provided, at least a portion of which is lithographically constructed, wherein the valve body includes a refrigerant inlet, a refrigerant outlet and an expansion chamber. The expansion chamber is disposed to communicate the refrigerant inlet with the refrigerant outlet and includes a restriction region having a flow restriction. Additionally, the valve body is disposed within the housing cavity to form an insulating channel between the valve housing and the valve body.
摘要翻译：提供了一种冻融阀和一种微型加工冻融阀的方法，包括阀壳体，其中阀壳体限定了壳体腔，并且包括壳体入口，壳体通风口，毛细管入口和毛细管管道出口。提供了阀体，其至少一部分是光刻构造的，其中阀体包括制冷剂入口，制冷剂出口和膨胀室。膨胀室设置成使制冷剂入口与制冷剂出口连通，并且包括具有流动限制的限制区域。此外，阀体设置在壳体腔内，以在阀壳体和阀体之间形成绝缘通道。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式