Example embodiments relate to microfluidic devices for controlling pneumatic microvalves. One embodiment includes a microfluidic device for independently controlling a plurality of pneumatic microvalves. The microfluidic device is couplable to a pressure source. The microfluidic device includes a first substrate. The microfluidic device also includes a flexible membrane covering the first substrate. Additionally, the microfluidic device includes a second substrate covering the flexible membrane. Further, the microfluidic device includes one or more fluidic channels at least partially defined in the first substrate. In addition, the microfluidic device includes a pressure couplable to the pressure source and branching into a plurality of pressure channels. Still further, the microfluidic device includes at least one pressure control switch per pressure channel.

A flow control device including a first channel, a second channel, and a diaphragm positioned between the first channel and the second channel, wherein the diaphragm includes a first side and a second side that faces an opposite direction as the first side. The diaphragm is configured and arranged to alternatively operate in both: a closed condition in which flow from the first channel to the second channel is impeded, and an open condition in which flow from the first channel to the second channel occurs. The diaphragm is also configured and arranged to change from the closed condition to the open condition when a force of a positive fluid flow through the first channel towards the first side of the diaphragm exceeds a combination of a gravitational force and a force of atmospheric pressure upon the second side of the diaphragm.

Fluid distribution valve (11), particularly for a vehicle screen wash system, characterized in that it comprises a body (41) defining a duct (43) for the passage of fluid and comprising at least one fluid inlet (45) and at least one fluid outlet (47, 49), a membrane (53) housed in the duct and configured to be deformed under the action of a magnetic field between a first position of at least partial closure of the duct and a second position of at least partial opening of the duct, and means (51) for generating a magnetic field within the duct in order to cause the membrane to deform.

A diaphragm member includes a film-shaped diaphragm made of PFA and a valve body which is laser welded to a central hole portion of the diaphragm.

A diaphragmatic elbow damper joining two angularly oriented channels and configured to seal the channels in the absence of fluid flow overcoming gravity and atmospheric pressure.

A fluidic latch device may include an input port, an additional input port, an output port, an additional output port, a pressure chamber, an additional pressure chamber, and a flexible membrane. The pressure chamber may include an inlet coupled to the input port by a first fluid channel and an outlet coupled to the output port by a second fluid channel, and the additional pressure chamber may include an additional inlet coupled to the additional input port by a third fluid channel and an additional outlet coupled to the additional output port by a fourth fluid channel. The flexible membrane may separate the pressure chamber and the additional pressure chamber and be configured to (1) block, when the membrane is in an expanded state, the outlet of the pressure chamber and (2) block, when the membrane is in an additional expanded state, the additional outlet of the additional pressure chamber.

A diaphragmatic elbow damper joining two angularly oriented channels and configured to seal the channels in the absence of fluid flow overcoming gravity and atmospheric pressure.

A centerbody assembly for a valve includes: a centerbody having a first side which defines a process surface and an opposed second side defining a back surface, at least one inlet orifice disposed in the centerbody and adapted to be disposed in fluid communication with a fluid at a process pressure, and at least one outlet orifice disposed in the centerbody separate from the at least one inlet orifice; an inlet port disposed in fluid communication with the at least one inlet orifice; an outlet port disposed in fluid communication with the at least one outlet orifice; and a flexible control diaphragm having opposed reference and process sides, wherein the control diaphragm is positioned with the process side facing the process surface, and a perimeter of the control diaphragm is sealed to the centerbody.

To prevent a defect in which particles such as impurities flow into a liquid that flows in from an inlet flow path and discharged from an outlet flow path. Provided is a suck-back valve including: a housing part; a valve element part; a diaphragm part; an open-close mechanism that brings the valve element part and a valve seat part into contact or separates the valve element part and the valve seat part from each other to switch between a closed state and an open state; and a suck-back mechanism that moves the diaphragm part in a direction in which the diaphragm part separates from the valve seat part to increase a volume of a valve chamber. The valve element part and the diaphragm part are molded integrally, the open-close mechanism is disposed in an adjacent space, and the valve element part and the open-close mechanism are coupled in the adjacent space.

A flow path assembly incorporating functional components, such as orifices and filters, is provided in which gaps between the functional components and the flow path components defining the flow path are sealed for an extended period of time. An annular elastic member interposed between the flow path members is provided outside the opposing surfaces of the flow path members, the flow path member has a caulking portion, the caulking portion integrates the flow path members and the plate-like member, exerts a force on the flow path member such that one of the opposing surfaces faces the other of the opposing surfaces, seals the gaps between the orifice plate and the opposing surfaces, and the elastic member is crushed between the flow path members to seal the gap between the flow path members.