EP 2074341 A4 20130410 - MICROFLUIDIC CHECK VALVES
Title (en)
MICROFLUIDIC CHECK VALVES
Title (de)
MIKROFLUIDISCHE RÜCKSCHLAGVENTILE
Title (fr)
CLAPETS DE NON-RETOUR MICROFLUIDIQUES
Publication
Application
Priority
- US 2007080489 W 20071004
- US 84922306 P 20061004
Abstract (en)
[origin: WO2008043046A2] The present invention is a robust, microfluidic check valve and a method of using the check valve in microfluidic devices. The check valve is comprised two stacked chambers that are separated by a pore-containing membrane. The membrane is composed of an elastomeric material and can be configured in normally open or normally closed state. The normally open check valve can be implemented so that the degree of back pressure necessary to close the valve can be set. The normally closed embodiment can maintain a closed state with essentially no back pressure. Both the normally open and the normally closed version can be readily produced by multilayer soft lithographic techniques and may retain effective functioning through many thousands of opening and closing cycles without failure. Such check valves can substitute for active valve structures in microfluidic devices and, when appropriately implemented, can simplify the design, manufacture, and/or operation of the devices containing them.
IPC 8 full level
F16K 1/00 (2006.01); F16K 15/00 (2006.01)
CPC (source: EP)
B01L 3/502738 (2013.01); F16K 99/0001 (2013.01); F16K 99/0026 (2013.01); F16K 99/0057 (2013.01); B01L 2200/12 (2013.01); B01L 2300/0887 (2013.01); B01L 2400/0605 (2013.01); B01L 2400/0638 (2013.01); F16K 2099/0078 (2013.01); F16K 2099/008 (2013.01)
Citation (search report)
- [XI] WO 0121988 A1 20010329 - CALIFORNIA INST OF TECHN [US], et al
- [I] US 6767194 B2 20040727 - JEON NOO LI [US], et al
- [A] US 2006030796 A1 20060209 - XU GUOLIN [SG], et al
- [I] EP 0587912 A1 19940323 - SEIKO EPSON CORP [JP]
- [I] XUAN-QI WANG ET AL.: "A Parylene Micro Check Valve", IEEE, CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA [US], 17 January 1999 (1999-01-17), pages 177 - 182, XP000830743
- [I] SHOJI S ET AL: "Microflow devices and systems", JOURNAL OF MICROMECHANICS & MICROENGINEERING, INSTITUTE OF PHYSICS PUBLISHING, BRISTOL, GB, vol. 4, no. 4, 1 December 1994 (1994-12-01), pages 157 - 171, XP020069428, ISSN: 0960-1317, DOI: 10.1088/0960-1317/4/4/001
- See references of WO 2008043046A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008043046 A2 20080410; WO 2008043046 A3 20080807; EP 2074341 A2 20090701; EP 2074341 A4 20130410
DOCDB simple family (application)
US 2007080489 W 20071004; EP 07843872 A 20071004