US 11,754,057 B2
Balanced pressure two-zone fluidic valve with shape memory alloy control element
Marco Citro, Varese (IT); Stefano Alacqua, Como County (IT); and Stefano Franceschinis, Milan (IT)
Assigned to SAES GETTERS S.P.A., Lainate MI (IT)
Appl. No. 17/615,245
Filed by SAES GETTERS S.P.A., Lainate (IT)
PCT Filed Jul. 21, 2020, PCT No. PCT/EP2020/070559
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2021/013836, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 102019000012552 (IT), filed on Jul. 22, 2019.
Prior Publication US 2022/0205434 A1, Jun. 30, 2022
Int. Cl. F03G 7/06 (2006.01); F16K 37/00 (2006.01); F16K 31/00 (2006.01); F16K 31/126 (2006.01)
CPC F03G 7/0614 (2021.08) [F16K 37/0041 (2013.01); F05C 2251/08 (2013.01); F16K 31/002 (2013.01); F16K 31/126 (2013.01)] 12 Claims
OG exemplary drawing
1. A fluidic valve comprising a first zone (I) and a second zone (II) separated by an aperture sealed by a deformable element,
wherein in said first zone (I) there is a shape memory alloy wire secured to a stationary surface and acting on a first surface of said deformable element either directly or through a piston,
wherein in said second zone (II) there are at least two ports, including an inlet port and an outlet port, and a plunger connected to a second surface of the deformable element, opposite to said first surface, and configured to close and seal the outlet port,
wherein a bypass channel permanently connects the first zone (I) to the second zone (II) through a first end aperture positioned in the first zone (I) and a second end aperture positioned in the inlet port in the second zone (II), and
wherein said fluidic valve further comprises a valve case defining, with said aperture and said deformable element, said first zone (I) and said second zone (II), and wherein said stationary surface is not a surface of said valve case and not a surface of said deformable element.