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.

Pump systems and methods are disclosed for removing liquid for hand-portable containers. The pump systems include a moveable piston housed in a main chamber and inlet and outlet valves located at one end of the main chamber, where the inlet and outlet valves open and close in response to movement of the piston.

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.

Disclosed is a check valve reliably closing a fluid path without the need of machining with high accuracy. The check valve includes a pair of members with clamping surfaces; and a valve body clamped by the clamping surfaces from both sides in a thickness direction of the valve body. The valve body is formed from an elastic body and includes an outer frame, a sealing part arranged inside the outer frame and configured to open and close a fluid path formed in one of the pair of members, and a coupling part configured to allow fluid to pass therethrough in the thickness direction and configured to couple the outer frame and the sealing part to each other. The outer frame has a thickness larger than an interplane dimension between the clamping surfaces when the pair of members are joined together.

Micropump (10) including a support structure (14), a pump tube (16), and an actuation system (18) comprising one or more pump chamber actuators (28), the pump tube comprising a pump chamber portion (24) defining therein a pump chamber (26), an inlet portion (20) for inflow of fluid into the pump chamber, and an outlet portion (22) for outflow of fluid from the pump chamber. The inlet, outlet and pump chamber portions form part of a continuous section of tube made of a supple material. The one or more pump chamber actuators are configured to bias against the pump chamber portion to expel liquid contained in the pump chamber via the outlet portion, respectively to bias away from the pump chamber portion to allow liquid to enter the pump chamber via the inlet portion. The pump chamber portion has a cross-sectional area Ap in an expanded state that is larger than a cross-sectional area Ai of the pump tube at the inlet and outlet portions.

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-mirror. 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-mirror, 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 diaphragm pump includes an inflow chamber and an outflow chamber. The inflow chamber is provided with an inflow valve seat. An inflow valve that prevents backflow of a liquid is disposed against the inflow valve seat. The outflow chamber is provided with an outflow valve seat. An outflow valve that prevents backflow of a liquid is disposed against the outflow valve seat. The diaphragm pump also includes an inflow-valve presser that presses the inflow valve against the inflow valve seat, and an outflow-valve presser that presses the outflow valve against the outflow valve seat. Each of the inflow valve and the outflow valve is defined by an elastically deformable member. Each of the inflow valve seat and the outflow valve seat includes a surface at least a portion of which is a curved surface.

A full-plastic liquid pump includes a pump body, a pump head, a piston, a spring, a threaded cover, a one-way valve, and a suction pipe. Two ends of the pump head are respectively provided with a liquid outlet and a sliding pressing rod. The middle portion of the slidable pressing rod movably passes through a cover hole formed of the threaded cover. A piston is connected with the inner wall of the pump body to divide the inner space of the pump body into an air pressure cavity and a liquid storage cavity. A vent hole is formed in the upper portion of the pump body. An axial through hole is formed in the center of the piston. A lower end of the spring is fixed in the liquid storage cavity. The one-way valve is fixed in the liquid storage cavity corresponding to the suction pipe.

Micropump (10) including a support structure (14), a pump tube (16), and an actuation system (18) comprising one or more pump chamber actuators (28), the pump tube comprising a pump chamber portion (24) defining therein a pump chamber (26), an inlet portion (20) for inflow of fluid into the pump chamber, and an outlet portion (22) for outflow of fluid from the pump chamber. The inlet, outlet and pump chamber portions form part of a continuous section of tube made of a supple material. The one or more pump chamber actuators are configured to bias against the pump chamber portion to expel liquid contained in the pump chamber via the outlet portion, respectively to bias away from the pump chamber portion to allow liquid to enter the pump chamber via the inlet portion. The pump chamber portion has a cross-sectional area Ap in an expanded state that is larger than a cross-sectional area Ai of the pump tube at the inlet and outlet portions.

A pump includes a collar, a cylinder and an elastic valve. The collar includes a wall, a tubular insert extending in the wall, and a connective portion formed between the wall and the tubular insert. The cylinder includes first and second open ends, first and second chambers respectively in communication with the first and second open ends, and a neck in communication with the first and second chambers. The elastic valve includes a ring, a plug extending in the ring, and elastic strips formed between the plug and the ring so that the plug is movable relative to the ring. The tubular insert is inserted in the first chamber via the first open end when the cylinder is connected to the wall, and the plug normally blocks the neck to form a first check valve when the elastic valve is connected to the second chamber.