A fluid system is disclosed and includes a fluid active region, a fluid channel, a convergence chamber, plural valves and plural sensors. The fluid active region includes a fluid-guiding unit for transporting fluid and discharging the fluid through an outlet aperture. The fluid channel is in communication with the outlet aperture and includes plural branch channels. The fluid discharged from the fluid active region is split by the branch channels, so that a required amount of the fluid to be transported is achieved. The convergence chamber is in communication with the fluid channel for allowing the fluid to be accumulated therein. Each valve is disposed in the corresponding branch channel. The fluid is discharged out through the corresponding branch channel according to an open/closed state of the valve disposed therein. Each sensor is disposed in the corresponding branch channel for measuring a specific detecting content in the fluid.

A microstructured fluid flow control device includes a substrate with a piezo-actuated first membrane arranged on a first substrate side, and a fluid channel that extends through the substrate between the first substrate side and an opposite second substrate side. In addition, the microstructured fluid flow control device includes a microvalve that extends through the fluid channel and is configured to close the fluid channel in an unactuated state, and a second membrane arranged on the first substrate side and spaced apart from the membrane and arranged between the fluid channel and the first piezo-actuated membrane. The second membrane is joined to the microvalve and is mechanically biased towards the first membrane so that a biasing force is applied to the microvalve, wherein the biasing force is part of a restoring force that causes the microvalve to close the fluid channel in an unactuated state.

A valve includes a first plate having a first vent hole; a second plate defining a valve chamber, which communicates with the first vent hole, between the second plate and the first plate, the second plate having a second vent hole that communicates with the valve chamber and that does not face the first vent hole; and a movable plate having a third vent hole that faces the second vent hole and disposed in the valve chamber such that the movable plate is movable between the first plate and the second plate. The second plate has an auxiliary hole that does not face the third vent hole in the movable plate, the auxiliary hole being surrounded by an edge portion that forms a first corner portion having a substantially convex rounded shape in front view of a principal surface of the second plate at a side facing the valve chamber.

Disclosed are devices, systems and methods for gas sampling, for controlling and measuring a gaseous flow, and for controlling a pressure gradient. An exemplary device 1 for controlling a gaseous flow comprises a gaseous flow adjusting interface 2, configured to inhibit or allow a flow of gas through the device 1 in a controlled manner, and control means 3, 4 of the adjusting interface. The adjusting interface 2 comprises a plurality of nano-holes 20. Each of the nano-holes has sub-micrometric dimensions and is suitable to be opened or closed in a controlled manner. The control means 3,4, in turn, comprise actuating means 3, suitable to open or close these nano-holes, and electronic processing means 4, configured to activate the actuation means to open or close individually or collectively the nano-holes 20 in a controlled manner.

A micro electrical mechanical system (MEMS) valve is provided. The MEMS valve includes first and second bodies, a medium and a thermal element. The first body defines a first channel and a second channel intersecting the first channel. The second body defines a third channel and is movable within the first channel between first and second positions. When the second body is at the first positions, the second and third channels align and permit flow through the second and third channels. When the second body is at the second positions, the second and third channels misalign and inhibit flow through the second channel. The medium is charged into the first channel at opposite sides of the second body. The thermal element is proximate to the first channel and is operable to cause the medium to drive movements of the second body to the first or the second positions.

Microvalve assemblies are disclosed that in some examples include a body including first and second ports and a body plate. The microvalve assemblies further include an actuator assembly including one or more exterior plates coupled to a stack. One of the one or more exterior plates contacts the body plate to form a seat and thereby restrict fluid flow from the first port to the second port, when the stack is not energized. Additionally, the actuator assembly is configured to, when the stack is energized, periodically generate a gap between the one of the one or more exterior plates and the body plate via near-field-acoustic-levitation (NFAL) to allow fluid flow through the first and second ports. Advantageously, the microvalves of this technology are relatively small and consume minimal power, thereby overcoming size and power limitations of existing valves, including pneumatic valve technologies.

A flow channel assembly (200) of a fluid micro-injection device has a fluid seat (210), a nozzle mounting plate (240), a nozzle (220), a nozzle platen (250) and a fluid supply joint (230). The nozzle (220) is connected to the fluid seat (210) by the nozzle mounting plate (240). The nozzle platen (250) is connected with the nozzle mounting plate (240) to secure the nozzle (220). The fluid supply joint (230) and the fluid seat (210) are connected to control the fluid flowing to the nozzle (220).

An improved aerosol dispensing apparatus includes an aerosol container, a discharge piece, an actuator, a flow control canister valve assembly attached to the aerosol container, a battery, and an electronically controlled flow control valve electronically connected to the battery and in fluid communication with the flow control canister valve assembly. The aerosol container and the attached flow control canister valve assembly are further attached to the actuator and the actuator is mounted for slidable movement within the discharge piece. The flow control canister valve assembly is movable between an open position wherein a volume of an aerosol formulation is directed from the aerosol container through the flow control canister valve assembly to the electronically controlled flow control valve, and a closed position wherein the aerosol formulation is not permitted to flow through the flow control canister valve assembly to the electronically controlled flow control valve.

The present invention relates to microfluidic check valves, as well as fluidic cartridges including such check valves. In particular examples, the check valve includes a pre-stressed spring formed from a planar substrate. Various characteristics of the valves, such as size, profile, opening pressure, etc., can be tuned to provide desired performance when employed within a fluidic cartridge.

A fluid control mechanism includes a chamber, a chamber wall, a piston provided within the chamber, and at least one fluid channel. A bottom portion of the chamber is configured to be in communication with the fluid channel. An opening connecting the fluid channel and the chamber is arranged at the bottom portion of the chamber. A piston mechanism has a chamber and a chamber wall, and a piston and a piston motion control member provided within the chamber. The piston motion control member is provided with external threads forming a screw thread pair with internal threads on the chamber wall, and is configured to rotate along the threads to move within the chamber for driving the piston to move in the chamber. The piston mechanism and the fluid control device can accurately control liquid in a micro or small fluid channel system.