US 11,717,825 B2
Magnetically controllable valve and portable microfluidic device having a magnetically controllable valve, in particular cartridge for sample preparation and molecule analysis
Davide Cucchi, Romano di Lombardia (IT); Lorenzo Bruno, Masera (IT); and Francesco Ferrara, Monteroni di Lecce (IT)
Assigned to STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed by STMICROELECTRONICS S.R.L., Agrate Brianza (IT)
Filed on Dec. 21, 2018, as Appl. No. 16/231,251.
Claims priority of application No. 102017000150547 (IT), filed on Dec. 28, 2017.
Prior Publication US 2019/0201894 A1, Jul. 4, 2019
Int. Cl. B01L 3/00 (2006.01); F16K 99/00 (2006.01); B01L 7/00 (2006.01); B01L 9/00 (2006.01)
CPC B01L 3/502738 (2013.01) [B01L 7/5255 (2013.01); B01L 9/527 (2013.01); F16K 99/003 (2013.01); F16K 99/0015 (2013.01); F16K 99/0046 (2013.01); F16K 99/0053 (2013.01); B01L 2200/027 (2013.01); B01L 2400/043 (2013.01); B01L 2400/0633 (2013.01); B01L 2400/0638 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A valve, comprising:
a valve body including a surface;
a first path portion in the valve body delimited by the surface of the valve body;
a second path portion in the valve body, the second path portion extends in a first direction;
an opening surrounded by an edge of the valve body and along the second path portion;
a coupling zone between the first and second path portions; and
a shutter arranged in the coupling zone, the shutter comprises:
a central portion;
a peripheral tapered shutting portion of ferromagnetic material deformable by an external magnetic field, the peripheral tapered shutting portion surrounds the central portion and extends outward from the edge surrounding the opening in a second direction transverse to the first direction;
a minor base surface of the central portion, the minor base surface faces away from the opening and towards the surface of the valve body;
a major base surface of the peripheral tapered shutting portion and the central portion, the major base surface is opposite to the minor base surface, the major base surface faces towards the opening and faces away from the surface of the valve body;
wherein the shutter configured to transition from:
a deformed position in which the peripheral tapered shutting portion is deformed and the major base surface is convex; and
an undeformed position in which the peripheral tapered shutting portion is undeformed and the major base surface is flat.