A dispenser cassette is shown and described for attachment to a peristaltic pump that has a first cartridge, second cartridge, and tubes, which are accommodated in the dispenser cassette such that both ends of the tubes are each inserted into one of the cartridges. According to the invention, the two cartridges are connected to one another by an elastic connector.

Components for a medical infusion fluid handling system, such as an APD system, in which one or more lines (such as solution lines), spikes or other connection ports may be automatically capped and/or de-capped. This feature may provide advantages, such as a reduced likelihood of contamination since no human interaction is required to de-cap and connect the one or more lines, the spikes or the other connection ports. For example, a fluid handling cassette may include one or more caps that cover a corresponding spike and include a raised and/or recessed feature to assist in removal of the one or more caps from the cassette. A solution line cap may include a hole and a recess, a groove or other feature to engage with a spike cap and enable removal of the spike cap.

A vacuum pump includes a hollow container that has a vacuum port and internal chamber walls. The vacuum port opens to an exterior of the container and the chamber walls define chambers that are in fluid communication with the vacuum port. There are flexible bladders disposed in the chambers. The flexible bladders include vents that open through the container to the exterior. A plunger in the container includes arms that extend into the chambers such that each of the flexible bladders is situated between one of the arms and one of the chamber walls. The plunger is moveable between a home position and an upstroke position to compress and deflate the flexible bladders via the vents and thereby change the volume of the flexible bladders. The change in the volume draws a vacuum through the vacuum port.

Downhole well pump assembly (1) having first and second pump units (7a, 7b) with first and second bellows (31) connected to inlet and outlet check valves. A drive fluid assembly (5) with first and second hydraulic drive lines (9a, 9b) communicates with the bellows. Hydraulic fluid is provided to the first and second hydraulic drive lines. A drive fluid distribution valve (11) is arranged between a drive pump (17) and the drive lines. It has a drive fluid inlet and outlet (113, 115), and first and second drive ports. The distribution valve (11) interchanges between a first mode, where the drive fluid inlet communicates with the first drive port and the drive fluid outlet (115) communicates with the second drive port; and a second mode, wherein the drive fluid inlet communicates with the second drive port, and the drive fluid outlet communicates with the first drive port.

A pumping apparatus 1 for dispensing a flowable product comprises first and second peristaltic pumps 12, 14. The first peristaltic pump 12 comprises a first rotor 18 having at least one pressing member 20, a first cylindrical stator 19 in which the first rotor 18 is rotatable and first flexible tubing 30 extending circumferentially around the first stator 19 against a first inner wall 19a. The second peristaltic pump 14 comprises a second rotor 42 having at least one pressing member 46, a second cylindrical stator 44 in which the second rotor 42 is rotatable and second flexible tubing 54 extending circumferentially around the second stator 44 against a second inner wall 44a. The first and second inner walls 19a, 44a each have a first and second radius r1, r2 respectively with the first radius r1 being greater than the second radius r2, and at least one of the stators 19, 44 is movable relative to the other stator 19, 44.

A liquid dispensing apparatus has a frame, a plurality of tubes supported by the frame, and a roller assembly supported by the frame. The roller assembly is movable between an upper position and a lower position. The roller assembly is cooperative with the plurality of tubes so as to apply compressive force to the plurality of tubes in the upper position and to release the compressive force in the lower position. The roller assembly is movable for a desired distance along the length of the plurality of tubes. The roller assembly is adapted to urge a liquid out of a lower end of the plurality of tubes by applying the compressive force to the plurality of tubes and moving the roller assembly downwardly along the plurality of tubes while the compressive force is applied to the plurality of tubes.

Devices, systems, and methods including a lubricating solution bath for a pump integrated into an ophthalmic surgical hand piece are provided. In some embodiments, an ophthalmic pump system includes a housing defining a cavity. The system includes a rotating element positioned within the cavity of the housing. The system includes a flexible tubular structure positioned within the housing adjacent to the rotating element such that rotation of the rotation element urges a fluid through the flexible tubular structure. The system includes a lubricating solution positioned within the cavity around the rotating element and at least a portion of the flexible tubular structure.

Proposed is a micropump. The micropump includes a head portion including a first and second movement guides and a first tip, and includes a body portion having at least a portion thereof accommodated in the head portion, the body portion including a core, a winding body, a first permanent magnet, a second permanent magnet, a first fixing guide, and a second fixing guide. The first movement guide and the first fixing guide are famed so as to correspond to each other, the second movement guide and the second fixing guide are formed so as to correspond to each other, a pole of the first permanent magnet faces or opposes a lower end contact surface of the core, and a facing direction of a pole of the second permanent magnet is same as a facing direction of the first permanent magnet.

The APPARATUSES, METHODS AND SYSTEMS FOR HARNESSING THE ENERGY OF FLUID FLOW TO GENERATE ELECTRICITY OR PUMP FLUID include a device which, when placed in fluid-flow, harnesses the kinetic energy of the flow to generate electricity or to perform useful mechanical work such as pumping. For example, the undulating mechanical action of traveling waves along flexible fins may be harnessed by summing the varying speeds and torques along the fins into a unified circulatory system for power take-off or fluid extraction. The device may include two fins, a chassis, and bellows/pistons/rotary vanes and the like which are connected via a circulatory system of tubes or conduits.

A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.