Saes Getters S.p.a.

Stefano Mattia Franceschinis

Stefano Alacqua

Marco Citro

A fluidic valve having a first zone and a second zone separated by an aperture that is sealed by a deformable element, where: in the first zone, there is a shape memory alloy (SMA) wire secured to a stationary surface and the SMA acts on a first surface of the deformable element either directly or through a piston; in the second zone, there are at least two ports and a plunger connected to a second surface of the deformable element, opposite to the first surface, and suitable to close one of the ports; and there is a bypass channel that permanently connects the first zone to the second zone through a first end aperture positioned in the first zone and a second end aperture positioned in the second zone.

Balanced pressure two-zone fluidic valve with shape memory alloy control element

The present invention relates in a first aspect to an actuator subassembly comprising a shape memory alloy wire (), a biasing spring () and magnetic responsive elements (') to couple the movement of a first movable element () and a second movable element () provided with a terminal (), and in a second aspect to a fluidic valve comprising a plunger whose terminal part controls its opening and closing and where the plunger movement is controlled by the action of a shape memory alloy wire, a biasing element and magnetic responsive elements.

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Milan, Italy

Stefano Mattia Franceschinis