A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

An infusion pump is disclosed. The infusion pump comprises a chamber having a distal end and a proximal end, and a longitudinal axis between the proximal end and the distal end. A piston is arranged for reciprocating movement within the chamber and along the longitudinal axis. At least one outlet is arranged from the chamber and may comprise an outlet valve. At least one inlet is provided into the chamber. The outlet and the inlet are axially spaced apart along the longitudinal axis of the chamber. A method for operating the pump is also provided.

A diaphragm pump is revealed. The diaphragm pump includes a pump device, a pump body, a top cover, and an air release valve head. The pump body includes at least two air inlet passages, at least one air outlet passage and at least one leak-proof/sealing passage, all selectively communicating with one cavity. The top cover includes a valve port, an air vent and an air outlet duct. Air pressure in the leak-proof passage acts on the air release valve head so that the valve port is closed by the air release valve head while the pump device is pumping air. The air release valve head and the valve port are separated from each other and then the valve port is communicating with the air outlet duct when the pump device stops pumping air. The pump performance is improved and no air release valve is required.

An air-bag type inflating device includes an elastic bag body and a sealing member; the sealing member has a first membrane, a second membrane and a third membrane, the second membrane is connected to the first membrane, the third membrane is stacked and arranged at a connecting location of the first membrane and the second membrane and disposed at an inner side of the first membrane; a unidirectional nozzle passage is formed between the first membrane and the third membrane, and capable of being optionally operated for opening or closing the first chamber and the second chamber. Accordingly, an opening/closing status of the unidirectional nozzle passage can be stably and precisely controlled after the bag body is pressed.

A fluid control apparatus includes a piezoelectric pump and valve. The valve includes a second valve housing, second seal member, diaphragm, first seal member, and first valve housing and has a structure in which they are laminated in sequence. The first valve housing includes a second vent and third vent, has a valve seat, and includes six cavities. The second valve housing has a first vent and first vent and includes a valve seat and six first protrusions. The second valve housing further includes six second protrusions nearer the outer edges than the six first protrusions, as seen in the x-axis direction in plan view.

A valve head structure and a diaphragm pump having the same are provided. The valve head structure includes a pump body, the pump body including a bonnet and a valve seat connected to each other, the valve seat is provided with a first connecting member; a diaphragm assembly mounted to an upper face of the valve seat, the diaphragm assembly including a plate body provided with a second connecting member fitted with the first connecting member; and a water outlet disc integrally formed on the plate body; a water inlet disc provided with a recessed face with a downwards opening, the water inlet disc being at least partly fitted closely with the recessed face, so as to open or close the water inlet opening.

A piston fuel pump for an internal combustion engine includes a pump housing, a piston, and a non-return discharge valve. The non-return discharge valve has a valve element and a guide element configured to guide the movement of the valve element. The guide element is at least indirectly pressed in a radial manner into an opening in the pump housing.

A fluid control apparatus includes a valve and a pump. The valve has a valve chamber surrounded by the first main plate, the second main plate, and the side plate. The first main plate has a first aperture, and the second main plate has a second aperture. The valve further includes a valve diaphragm disposed inside the valve chamber. The valve diaphragm is configured to switch between a state in which the first aperture and the second aperture communicate with each other and a state in which the first aperture and the second aperture do not communicate with each other. The pump includes a vibration unit that has a piezoelectric device and a vibrating plate. The pump has a pump chamber that is defined by the vibration unit and the second main plate. The pump chamber communicates with the valve chamber through the second aperture.

A cassette integrated system. The cassette integrated system includes a mixing cassette, a balancing cassette, a middle cassette fluidly connected to the mixing cassette and the balancing cassette and at least one pod. The mixing cassette is fluidly connected to the middle cassette by at least one fluid line and the middle cassette is fluidly connected to the balancing cassette by at least one fluid line. The at least one pod is connected to at least two of the cassettes wherein the pod is located in an area between the cassettes.

A sphygmomanometer device includes a piezoelectric pump, a valve, and a cuff. The valve includes a first valve housing, a diaphragm, and a second valve housing. The diaphragm is fixed to the second valve housing and first valve housing such that it is separated from a valve seat and the periphery of an opening portion in the diaphragm is in contact with a valve seat while providing a pressure thereto. Thus, the diaphragm defines a lower valve chamber communicating with a first vent hole, an upper valve chamber communicating with a second vent hole, a lower valve chamber communicating with a first vent hole, and an upper valve chamber communicating with the upper valve chamber, together with the second valve housing and first valve housing.