A dual latching microvalve is capable of a metastable state, wherein a one or more complete flow paths are open, before switching to another state that allows only an inlet or outlet valve to be open at any time on any fluid path. One valve mechanism uses a cam to alternately open and close two valves, with an external force applying pressure to move one valve arm onto a resting position on the cam, thereby opening the closed valve and provided an uninterrupted flow path through the dual latching microvalve. The metastable state provides, for example, a means to prime the pump before operation, such as pumping of insulin into a patient. When released from the metastable state, the dual latching microvalve operates in a fashion whereby opening of both valves simultaneously is prevented, thereby protecting the patient from injury.

A pinch clamp device for a flexible tube is disclosed, the pinch clamp device comprising a first part (2) and a second part (3) that are movable with respect to each other, wherein the first part (2) comprises a first conduit (5) for housing a flexible tube and the second part (3) comprises a second conduit (6) for housing the same flexible tube, wherein the first part (2) and the second part (3) are arranged in an interacting manner such that the pinch clamp device can be present in a first position or in a second position, wherein a flow of a fluid within a flexible tube arranged inside the first conduit (5) and the second conduit (6) is enabled in the first position, and wherein a flow of a fluid within a flexible tube arranged inside the first conduit (5) and the second conduit (6) is prevented in the second position. According to an aspect of the invention, the first part (2) and the second part (3) are designed axisymmetrically. Furthermore, a pinch clamp arrangement comprising such a pinch clamp device is disclosed. Additionally pump arrangement comprising a pump and such a pinch clamp arrangement is disclosed.

Disclosed is a water filtration device which includes various hoses for connection between different parts of the filtration device and a rotatable cam system which, during backwash cycles, is rotated so as to clamp various the hoses in predetermined sequences for thereby controlling the direction of the flow of water through the tubing system. Electrical pinch valves are use alternatively to a cam shaft.

A housing having a housing body (100) carries on the outside of one of the side walls (110) a bolt (500) aligned parallel to the lid guide grooves (120) and the lid (200) carries a sleeve (222) fixed to a tab (220) projecting over the upper edge of the corresponding side wall (110) of the housing body (100) and aligned coaxially with the bolt (500). The sleeve (222) engages around the bolt (500) to form an axially and rotationally movable sliding bearing.

A pinch valve having a clamping member (300) mounted between two side walls (110) of a valve housing, the side walls extending parallel to a hose guide axis and to a plunger guide axis. Each of the side walls has a step (112) extending parallel to the hose guide axis and recessing with respect to the advancing direction of the plunger. The clamping jaws (320) of the pinch valve, upon displacement of the clamping member (300), move over the steps (112) with their outer sides, which face away from the hose guide, bearing against the side walls (110).

A fluid switching valve including a first elastic tube that delivers a first fluid; a second elastic tube that delivers a second fluid; a third elastic tube having one end connected to the first and second elastic tubes; and a switching member that, by displacing a protruding portion, switches between a first state in which the first elastic tube is constricted and the second fluid is delivered to the third elastic tube, a second state in which the second elastic tube is constricted and the first fluid is delivered to the third elastic tube, a third state in which the first and second elastic tubes are both constricted and introduction of fluid to the third elastic tube is cut off, and a fourth state in which neither the first nor second elastic tube is constricted and both the first and second fluids are delivered to the third elastic tube.

A through-flow regulating device for a hose line of a medical infusion system having at least one rotationally movable clamping member which, in the mounted state, is operatively connected to the hose line and which can be manually adjusted relative to a hose section of the hose line in order to change a fluid through-flow rate of the hose section. Two clamping members mounted in a rotationally movable manner are provided, which flank a jacket of the hose section on opposite sides, and at least one clamping member has a circumferential contour which is formed, at least in sections, in an eccentric manner relative to an axis of rotation of the clamping member.

A fluid feeding apparatus includes: a first connection portion configured to be connected to a first container in which fluid is stored; a second connection portion configured to be connected to a second container in which fluid is stored; a first flow path that communicates with the first connection portion; a second flow path that communicates with the second connection portion; a resistance portion configured to generate a difference of conduit resistance to cause one of the first flow path and the second flow path to be higher in the conduit resistance than the other flow path; and a switching portion switching a level relationship of the conduit resistance between the first flow path and the second flow path.

A pinch valve may use a spring force to close a collapsible tube at a pinch point, and may open with a cam mechanism, which may be controlled using an electric motor. The open and closed positions of the pinch valve may be stable without the use of continuing electrical energy, and electrical energy may be consumed during a change between positions. One arrangement may use multiple tubes in a circular arrangement with a cam that may operate one or more of the valves at a time. The cam mechanism may be driven by an electric motor.

A multi-tubing pinch valve assembly including a receiving space defined between a pinch protrusion and tubing contact body. The multi-tubing pinch valve assembly is moveable between a retracted state and an extended state. In the extended state, multiple tubes disposed in the receiving space are pinched, restricting flow therethrough. In the retracted state, multiple tubes are capable of being loaded into and/or out of the receiving space.