A fluidic device comprises a first channel conduit, a valve apparatus, and an additional element adjacent to the first channel conduit. The first channel conduit transports fluid from a first fluid entrance to a fluid exit. In one embodiment, the additional element is a pump chamber that receives fluid from a second fluid entrance and pumps fluid into the first channel conduit in accordance with fluid pressure. Alternatively, the additional elements include a second channel conduit and a neck of the first channel conduit. The first channel conduit and the second channel conduit share a common wall. Fluid pressure in the first channel conduit controls a valve apparatus. The value apparatus controls a rate of fluid flow in the first channel conduit by deforming the common wall to change a cross-sectional area of the neck, which changes a rate of fluid flow in the second channel conduit.

A fluidic switch (or fluidic device) is provided. The fluidic switch includes: (i) a housing defining a cavity with a first opening and a second opening, the second opening being larger than the first opening, the cavity containing an elastic substance, (ii) a channel to transport a fluid from a source, across the first opening, to a drain, where the first opening opens into the channel, and (iii) an actuator to apply a force through the second opening to the elastic substance in the cavity when actuated, the force to displace a portion of the elastic substance into the channel to impede transport of the fluid through the channel.

A fluid valve is provided that includes a first planar substrate having a smooth surface or a surface with features, an elastomer disposed on the first substrate, a second planar substrate disposed on another side of the elastomer, where the second substrate has a smooth surface or features, where the first and second substrate are more rigid than the elastomer, where the first substrate, the second substrate or the elastomer has a fluid channel, where the channel is open when the first or second substrate are in a first thermal state or a first compression state, where the channel is closed or partially closed when the first or second substrate are in a second thermal state or a second compression state, where the second thermal state is a different temperature than the first thermal state, where the second compression state is a different pressure than the first compression state.

A fluidic device controls fluid flow in channel from a source to a drain. In some embodiments, the fluidic device comprises a channel and a gate. The channel is configured to transport a fluid from the source to the drain. The gate controls a rate of fluid flow in the channel in accordance with the fluid pressure within the gate. Specifically, the gate is configured to induce a first flow rate of the fluid in the channel in accordance with a low pressure state of the gate, and a second flow rate of the fluid in the channel in accordance with a high pressure state of the gate. In certain embodiments, the first flow rate is greater than the second flow rate. In alternative embodiments, the second flow rate is greater than the first flow rate.

Micro-valve system includes two or more superimposed tubes and a pressing device for fluid control in miniaturized capillary connections. The micro-valve system and method of fabrication can be tailored to the requirements of a wide range of applications; composition, sturdiness and thickness of plastic tubes; and capable of been adapted to the resilient of mechanical pressure and the passing and transport of fluid types.

A fluidic switch (or fluidic device) is provided. The fluidic switch includes: (i) a housing defining a cavity with a first opening and a second opening, the second opening being larger than the first opening, the cavity containing an elastic substance, (ii) a channel to transport a fluid from a source, across the first opening, to a drain, where the first opening opens into the channel, and (iii) an actuator to apply a force through the second opening to the elastic substance in the cavity when actuated, the force to displace a portion of the elastic substance into the channel to impede transport of the fluid through the channel.

Provided is a centrifugal separation container for separating a material from tissue and body fluids by using a centrifugal force, including: a first container; a second container; a first piston positioned in the inside of the first container and configured to be movable up and down in the inside of the first container; an elastic body positioned below the first piston in the inside of the first container and configured to elastically bias the first piston upward; a first connecting duct having one end connected to the first container and the other end connected to the second container; and a first control valve operating by a centrifugal force and configured to open and close the first connecting duct.

A valve for use in connection with microfluidic devices includes a safety feature such that flow is controlled even in the case of a loss of power, thus having applications in critical applications such as the precise delivery of drugs over time. The valve may be used in connection with multiple tubes delivering drugs, and may be used with a pump, such as an electrochemical pump, to provide the force to move the fluids containing drugs for delivery. In certain applications, more than one medicine may be delivered and metered independently using a single pump with multiple reservoirs and valves.

A low-voltage microfluidic valve device and system for regulating the flow of fluid. One low-voltage microfluidic valve device for regulating the low of fluid includes a nano-textured dendritic metallic filament configured to grow and retract in response to a voltage. The low-voltage microfluidic valve device also includes a microfluidic channel configured to allow fluid flow, wherein the fluid flow is selectively interrupted by the growth of the nano-textured dendritic metallic filament. The low-voltage microfluidic valve device also includes a membrane positioned proximate to the fluid and configured to alter shape in response to the growth of the nano-textured dendritic metallic filament.

A fluidic device comprises a first channel conduit, a valve apparatus, and an additional element adjacent to the first channel conduit. The first channel conduit transports fluid from a first fluid entrance to a fluid exit. In one embodiment, the additional element is a pump chamber that receives fluid from a second fluid entrance and pumps fluid into the first channel conduit in accordance with fluid pressure. Alternatively, the additional elements include a second channel conduit and a neck of the first channel conduit. The first channel conduit and the second channel conduit share a common wall. Fluid pressure in the first channel conduit controls a valve apparatus. The value apparatus controls a rate of fluid flow in the first channel conduit by deforming the common wall to change a cross-sectional area of the neck, which changes a rate of fluid flow in the second channel conduit.