The present invention relates to a liquid metering device (1) for metering pumps which is formed by a main longitudinal conduit (2) with a first and second opposite ends (2.1, 2.2) comprising a fluid inlet (3) at the first end (2.1) located perpendicular thereto, a first outlet (4) at the second end (2.2), and a first connection (5) to backpressure control means (6), a second connection (7) to safety means (8), acting in parallel and in an independent manner, and a second overpressure outlet (9), arranged in one and the same connecting section (10), and where said connecting section (10) has an inclined wall (11) allowing the fluid to exit through the first outlet (4) for a fluid pressure equal to or greater than a fixed backpressure value and the fluid to exit through the second outlet (9) for a pressure greater than a fixed value.

A portable inflation device of the present application includes an inflation pump body, an upper casing, a middle casing, a lower casing, a resilient component, and a resilient ventilation plug. The upper casing and the middle casing respectively seal two ends of the inflation pump body, and an air chamber is defined thereamong. An accommodating chamber is defined between the middle casing and the lower casing disposed outside the air chamber. An intake hole, a first ventilation hole and an exhaustion hole are respectively formed on the upper casing, the middle casing and the lower casing. The resilient ventilation plug disposed inside the accommodating chamber includes a perforated foam positioned between the first ventilation hole and the exhaustion hole and an sealing layer covering a surface of the perforated foam facing towards the first ventilation hole. The inflation device is small in volume, collapsible, portable, and easy to operate.

A micro pump is applied to be implanted into human's blood vessels and includes a substrate, a flow-guiding-and-actuating unit, plural switching valves, a driving chip and a micro-monitor. The substrate has plural guiding channels including an inlet channel, an outlet channel and a branch channel. The flow-guiding-and-actuating unit covers a compressing chamber, and is enabled to change the volume of the compressing chamber so as to transport fluid. When a communication connector of the driving chip receives an external command, the driving chip enables the flow-guiding-and-actuating unit and the micro-monitor, and controls the open/closed states of the switching valves covering an outlet aperture and a storage outlet, thereby the flow-guiding-and-actuating unit drives the fluid medicine from a storage chamber to the outlet aperture, so as to deliver the fluid medicine to a target blood vessel.

A micropump includes: a pumping chamber, between a first semiconductor substrate and a second semiconductor substrate bonded to each other; an inlet valve, having an inlet shutter element between an inlet passage and the pumping chamber; an outlet valve, having an outlet shutter element between the pumping chamber and an outlet passage; a first recess for housing the inlet shutter element when the inlet valve is in the open configuration, the first recess and the pumping chamber being fluidly coupled; a second recess for housing the outlet shutter element when the outlet valve is in the open configuration, the second recess and the pumping chamber being fluidly decoupled.

A dispenser includes a body having a an exterior surface, an interior surface, a first chamber, a first opening in fluid communication with the first chamber and extending through the body, a second opening in fluid communication with the first chamber and extending through the body, a first valve and a second valve disposed on the body, the valves having a closed and an open configuration, and an actuator disposed at least partially within the first chamber. The actuator may be configured to increase and decrease pressure in the first chamber such that the first valve and the second valve change from their respective closed configurations to their respective open configurations and from their respective open configurations to their respective closed configurations. When in the closed configuration, flow through the valves is impeded.

A pumping device for processing a liquid comprises: a plurality of pistons, each of which is slidable along a movement direction in order to vary the volume of a corresponding chamber; a casing inside of which a driving device is housed for moving each piston of the plurality of pistons along the movement direction; a head inside of which the chambers are at least partially obtained; a plurality of suction valves, each one of which is associated with a chamber and is operable for enabling the liquid to enter the chamber; a plurality of delivery valves, each one of which is associated with a chamber and is operable for enabling the liquid to exit the chamber.

Each suction valve has an axis arranged transversely with respect to a further axis of the delivery valve associated with the same chamber. The pumping device further comprises an intermediate body interposed between the casing and the head. The intermediate body is provided with a guide device for guiding each piston along the movement direction.

The invention discloses a quick-exhaust diaphragm pump, belonging to the technical field of diaphragm pumps. The key points of the technical scheme of the quick-exhaust diaphragm pump comprises that a buffer seat is arranged at the lower end of the valve seat; a buffer slot is formed in the buffer seat; when the buffer seat is covered on the valve seat, a buffer space is formed by the lower surface of the valve seat and the buffer slot. The quick-exhaust diaphragm pump can prevent airflow in the pressure relief airbag from fluctuating and improves the stability of supply airflow.

A micro channel structure includes a substrate, a supporting layer, a valve layer, a second insulation layer, a vibration layer and a bonding-pad layer. A flow channel is formed on the substrate. A conductive part and a movable part are formed on the supporting layer and the valve layer, respectively. A first chamber is formed at the interior of a base part and communicates to the hollow aperture. A supporting part is formed on the second insulation layer. A second chamber is formed at the interior of the supporting layer and communicates to the first chamber through the hollow aperture. A suspension part is formed on the vibration layer. By providing driving power sources having different phases to the bonding-pad layer, the suspension part moves upwardly and downwardly, and a relative displacement is generated between the movable part and the conductive part, to achieve fluid transportation.

A dispenser includes a body having a an exterior surface, an interior surface, a first chamber, a first opening in fluid communication with the first chamber and extending through the body, a second opening in fluid communication with the first chamber and extending through the body, a first valve and a second valve disposed on the body, the valves having a closed and an open configuration, and an actuator disposed at least partially within the first chamber. The actuator may be configured to increase and decrease pressure in the first chamber such that the first valve and the second valve change from their respective closed configurations to their respective open configurations and from their respective open configurations to their respective closed configurations. When in the closed configuration, flow through the valves is impeded.

A simple, compact, and economical motor/pump unit for supplying vacuum to a pneumatic brake booster of a motor-vehicle brake system, wherein the motor/pump unit is designed as a diaphragm pump having a single elastomeric diaphragm, which is moved by an electrically operated motor unit by an eccentric drive, and has a pump housing and a working-space cover and the diaphragm is clamped between the pump housing and the working-space cover at the radial outer edge of the diaphragm in a sealing manner and the working-space cover is designed as a multi-part working-space cover having an upper cover, a lower cover, and an inlet valve and an outlet valve, which are arranged between the upper cover and the lower cover and control the air circulation through the working space.