公开(公告)号：US20120241017A1

公开(公告)日：2012-09-27

申请号：US13427282

申请日：2012-03-22

申请人： Jeffrey Chun-Hui Lin ,  Feiqiao Yu ,  Yu-Chong Tai

发明人： Jeffrey Chun-Hui Lin ,  Feiqiao Yu ,  Yu-Chong Tai

IPC分类号： F16K21/04 ,  F16K51/00

CPC分类号： F16K99/0009 ,  F16K99/0057 ,  Y10T137/0491 ,  Y10T137/7837

摘要： Microfluidic normally closed check valves and methods of making and using the same are provided. The check valves include an orifice, an occluding portion, and one or more attachment members which urge the occluding portion into a position occluding the orifice. In various embodiments, the attachment member or members are pre-stressed by thermal annealing to introduce tensile stress of at least 800 PSI therewithin, thereby increasing the cracking pressure of the valve

摘要翻译： 提供微流体常闭止回阀及其制作及使用方法。 止回阀包括孔口，闭塞部分和一个或多个附着构件，其将阻塞部分推入封闭孔口的位置。 在各种实施例中，通过热退火对附接构件进行预应力，以在其中引入至少800PSI的拉伸应力，从而增加阀的开启压力