Abstract: A peristaltic pump can include a chassis and a chassis retaining portion forming a cavity. The pump can also include a rotor, a cover, and a linkage. The rotor can be disposed within the cavity such that tubing can be held between the rotor and the chassis and/or the chassis retaining portion. The linkage can couple the cover to the chassis. The linkage can include an arm. When opening the cover, the arm can pivot such that the chassis moves away from the chassis retaining portion to widen the cavity. When closing the cover, the arm can pivot such that the chassis moves toward the chassis retaining portion. When closed, a stop can restrict further movement of a corresponding member toward the chassis retaining portion.

Abstract: Disclosed herein is a peristaltic pump for medical applications comprising a motor, a rotor coupled to the motor, a housing in which the rotor is arranged and an opening and closing mechanism comprising a tube pressuring portion, a slider and a pivotable cover coupled to the housing and the slider. The opening and closing mechanism is accentuated by the pivotable cover, which pivotable cover is connected to the tube pressuring portion via elastic elements. The elastic elements are thereby connected via at least one adjustable element so that the tension or pretension in the elastic element can be adjusted to tube types and material, to the viscosity of the pumped fluid and to the amount of fluid that needs to be pumped.

Abstract: A system, method, and apparatus for the collection of surgical/wound fluid from a subject patient with the capability of simultaneous fluid removal from a plurality of such wounds and/or wound through the utilization of a single pump device worn by such a patient. Such a system, method, and apparatus allow for such a single pump device to collect surgical/wound fluid within a single site collection component attached to or associated with such a single pump device. Multiple fluid transfer lines may be incorporated with the single pump device leading to such plurality of wounds and/or wound sites for greater versatility and comfort for the subject patient, as well as cleaner removal capabilities than in the standard apparatus systems and method currently undertaken within the industry.

Abstract: A hose pump rotor includes a main rotating shaft. The main rotating shaft includes a main shaft and a rotor base which are fixedly connected to each other, roller support arms are symmetrically arranged on the rotor base and outer ends thereof are connected to rollers, with axes of the rollers being parallel to an axis of the main shaft, the roller support arms and the rotor base form a radially-displaceable limiting fit, and the roller support arms and the rotor base form a locking fit. The rotor base includes a groove enclosed by a bottom plate and side plates disposed on opposite sides thereof, wherein the bottom plate is fixedly connected to the main shaft.

Abstract: 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.

Abstract: The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

Abstract: The present invention relates to an improvement of a hose cassette for a peristaltic pump. The hose cassette has a U-shape and is made from a flexible material, so that the liquid-conveying hose segment can surround the roller wheel in a better way, whereby the pumping capacity is improved. Surprisingly, a cassette configured in such a way can in an easier and more economical manner be made than cassettes of the prior art.

Abstract: An autoclaving microplate washing system for cells and non-adhering three-dimensional (3D) cell cultures includes one or more peristaltic pumps for controlling the dispensing of washing fluid and the evacuation of fluid from microwells to gently wash the cells.

Abstract: The present invention relates to the titration and delivery of anesthetic and sedative medications to a subject. Further, the present invention relates to a device and methods for titrating and delivering such medications in a semi-automated or fully automated manner and which can be monitoring and controlled remotely. Even still further, the present invention relates to such a device that can perform the titration and delivery of medication in a manner that minimalizes occlusion and prevents back flow of the medication. More particularly, the present invention relates to a device for titration and delivery of medication using a non-concentric pumping mechanism that gradual or progressively increases and decreases occlusion in the medication delivery line within the pump to minimize and/or prevent sudden formation and release of occlusion in order to provide more steady and continuous flow of the medication through the device to the subject.

Abstract: A peristaltic pump includes a rotating member operably coupled to a drive. The rotating member includes a plurality of rollers arranged in a circular configuration. A guide member defines a channel configured to direct a peristaltic tube around the rotating member so that the peristaltic tube interfaces with the plurality of rollers. The peristaltic tube is pressed against the plurality of rollers by a retaining shoe. The retaining shoe contains surface irregularities configured to restrict movement of the peristaltic tube. A keeper braces the restraining shoe against the peristaltic tube. The rotating rollers compressing the peristaltic tube against the retaining shoe as the rotating member rotates results in a peristaltic action that produces a nearly pulse free linear flow.

Abstract: A peristaltic pump includes a rotor and a track assembly. The track assembly is spaced from the rotor to receive n tubes therebetween, where n=2m with m a positive integer ?2. The tubes are manifolded to one another at a discharge port. One of the rotor and the track includes an occlusion surface for each of the n tubes. The occlusion surfaces are located at n different angular positions. The angular offset between the occlusion surfaces offsets pulsation associated with each tube so as to reduce overall pulsation at the discharge port.

Abstract: A cell culture system for the production of cells and cell derived products includes a reusable instrumentation base device incorporating hardware to support cell culture growth. A disposable cultureware module including a cell growth chamber is removably attachable to the instrumentation base device. The base device includes microprocessor control and a pump for circulating cell culture medium through the cell growth chamber. The cultureware module is removably attached to the instrumentation base device. Cells are introduced into the cell growth chamber and a source of medium is fluidly attached to the cultureware module. Operating parameters are programmed into the microprocessor control. The pump is operated to circulate the medium through the cell growth chamber to grow cells or cell products therein. The grown cells or cell products are harvested from the cell growth chamber and the cultureware module is then disposed.

Abstract: A peristaltic pump may include a rotor rotatably mounted on a base and an occlusion bed mounted on the base and moveable toward and away from the rotor. The peristaltic pump may also include a lid hingedly mounted to the base along a first hinge axis including a mounting bracket extending perpendicularly relative to the first hinge axis. A linkage assembly connecting the occlusion bed and the lid may include a pair of curved arms hingedly mounted to the mounting bracket along a second hinge axis parallel to the first hinge axis and a cam connecting the pair of curved arms and having a cam surface facing the mounting bracket, the cam being hingedly mounted to the occlusion bed at an end opposite the second hinge axis. The mounting bracket abuts the cam surface and form a cooperative connection between the lid and the occlusion bed via the linkage assembly.

Abstract: A peristaltic pump system has a pump tube and a pump rotor engaging the pump tube. The pump rotor is drivable to rotate to move a pump fluid through the pump tube from a pump inlet to a pump outlet. A motor drives the pump rotor to rotate. The motor includes a motor tube and a motor rotor to be driven to rotate by a motor fluid moving through the motor tube from a motor inlet to a motor outlet. A urine treatment system and method are also disclosed.

Abstract: In a device for ambulatory wearing by the patient containing a pump for delivery of injection fluid or for removal of analysis fluid, the drive motor for the mechanically driven pump system is a Lavet-type stepper motor of small size designed for having a high mechanical power and low peak current requirement. Using this Lavet-type motor for syringe-type or peristaltic preferably patch-type pumps high infusion rates needed for e.g. bolus insulin injection or the delivery of therapeutic antibodies are achieved, and important safety features can be easily and reliably controlled, manufacturing costs get significantly reduced, and the overall size and weight of the device becomes smaller, for patient convenience.

Abstract: Embodiments of a medical device and related methods of use are provided for extracting tissue. The device may include an elongate member having a proximal end and a distal end. Two or more channels may extend through the elongate member from the proximal end to the distal end, and a morcellating device may be included in one of the channels. In addition, one of the channels may be configured as a return channel for extracting the morcellated tissue.

Abstract: A peristaltic pumphead is provided that has a pumping chamber within which is disposed a pressing element for exerting a peristaltic action on a tube extending within the pumping chamber, and an auxiliary chamber which in normal use is a dry chamber. The pumping chamber and the auxiliary chamber are arranged in fluid communication such that liquid which escapes from the tube into the pumping chamber flows from the pumping chamber into the auxiliary chamber.

Abstract: The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

Abstract: A peristaltic pump includes a rotating member operably coupled to a drive. The rotating member includes a plurality of rollers arranged in a circular configuration. A guide member defines a channel configured to direct a peristaltic tube around the rotating member so that the peristaltic tube interfaces with the plurality of rollers. The peristaltic tube is pressed against the plurality of rollers by a retaining shoe. The retaining shoe contains surface irregularities configured to restrict movement of the peristaltic tube. A keeper braces the restraining shoe against the peristaltic tube. The rotating rollers compressing the peristaltic tube against the retaining shoe as the rotating member rotates results in a peristaltic action that produces a nearly pulse free linear flow.

Abstract: The present disclosure may relate to a pump including a centerless rim, a first roller guide shaped to roll along the centerless rim such that as the first roller guide is rotated, friction between the first roller guide and the centerless rim causes a corresponding rotation of the centerless rim. The pump may also include a second roller guide shaped to roll along the centerless rim, and a plurality of peristaltic rollers coupled to the centerless rim. The pump may additionally include a tube housing disposed proximate the plurality of peristaltic rollers, and a tube disposed between the tube housing and the peristaltic rollers such that as the centerless rim is rotated, the peristaltic rollers compress the tube against the tube housing to create negative pressure within the tube.

Abstract: Methods and apparatus for generating droplets are disclosed. In one arrangement a peristaltic screw pump is configured to drive pulsatile flows of fluids in different conduits which are phased relative to each other such that a sequence of droplets are formed at a junction downstream from the pump.

Abstract: The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

Abstract: This specification describes technologies relating to a pump for dispensing precise quantities of fluids. In some implementations, a pump includes a pump head including one or more recesses configured to receive one or more corresponding roller elements; and a pump body including an input port, and output port, a first fluid channel, and a second fluid channel, wherein the first fluid channel is formed in part from rigid walls of the pump body and in part from a semi-rigid membrane positioned on at least a portion of the pump body; wherein the pump head is rotatably coupled to the pump body such that the one or more roller elements interface with the semi-rigid membrane such that during rotation the roller elements compress the semi-rigid membrane to push fluid trapped within the first fluid channel in the direction of rotation.

Abstract: In one embodiment, a feed pump of a tube pump type is used for supplying a processing liquid. The tube pump has a squeezing member that moves from a first axial position of a tube at which the squeezing member starts pinching of the tube, to a second axial position at which the squeezing member leaves the tube after feeding the processing liquid toward an ejecting part such as a nozzle. Only one pinched part pinched between the squeezing member and a guide member is formed between the first axial position and the second axial position of the tube, and the only one pinched part moves along the axial direction of the tube, during feeding of a dose of the processing liquid toward the ejecting part.

Abstract: A pump is formed by a housing (10) having an inlet (11) and an outlet (12) for a fluid. The housing (10) contains a rotator (13) provided with at least one surface recess (17a, 17b, 17c, 17d) that forms with an interior surface of the rotor a chamber (18a, 18b, 18c, 18d) that, on rotation of the rotor (13), conveys fluid from the inlet (11) to the outlet (12). A flexible seal (23) is provided on or as part of the housing (10) and is located between the inlet (11) to the outlet (12) to engage the rotor (13) to prevent fluid passing from the outlet (12) to the inlet (11). A second inlet (16) is provided leading to the outlet (12) for the supply to the outlet (12) of a second fluid and the second inlet (16) also supplies the second fluid to the back of the seal (23) to urge the seal (23) against the rotor (13).

Abstract: A fluid management system includes a disposable cassette carrying inflow and outflow tubing sections that are configured for releasably mating with a console including a control unit and a pair of roller pump heads. The console may automatically identify the disposable cassette and weigh the fluid in an inflow source. During operation, the system can monitor pressure in the working space, and provide for inflow and outflow control to maintain any desired operating parameters.

Abstract: A hose pump for the conveyance of a fluid conducted in a hose, with several squeezing elements and with a hose bed, which has a hose inlet, a hose outlet, a guide surface, and a counter support, in which the hose is placed lying on the guide surface and is pressed by the squeezing elements against the counter support for the conveyance of the fluid found in the hose when the hose pump is operated in a conveyance direction. The hose pump has a guiding-out device for the automatic guiding of the hose out of the hose bed, and the guiding out of the hose takes place by means of the guiding-out device during the operation of the hose pump opposite its conveyance direction. For the development of an as low-cost as possible but nevertheless reliable guiding-out device, an elevation, located on the hose outlet of the hose bed, is provided, which protrudes over the guide surface and via which the hose is conducted.

Abstract: The present disclosure may relate to a pump including a centerless rim, a first roller guide shaped to roll along the centerless rim such that as the first roller guide is rotated, friction between the first roller guide and the centerless rim causes a corresponding rotation of the centerless rim. The pump may also include a second roller guide shaped to roll along the centerless rim, and a plurality of peristaltic rollers coupled to the centerless rim. The pump may additionally include a tube housing disposed proximate the plurality of peristaltic rollers, and a tube disposed between the tube housing and the peristaltic rollers such that as the centerless rim is rotated, the peristaltic rollers compress the tube against the tube housing to create negative pressure within the tube.

Abstract: The present disclosure may relate to a pump including a centerless rim, a first roller guide shaped to roll along the centerless rim such that as the first roller guide is rotated, friction between the first roller guide and the centerless rim causes a corresponding rotation of the centerless rim. The pump may also include a second roller guide shaped to roll along the centerless rim, and a plurality of peristaltic rollers coupled to the centerless rim. The pump may additionally include a tube housing disposed proximate the plurality of peristaltic rollers, and a tube disposed between the tube housing and the peristaltic rollers such that as the centerless rim is rotated, the peristaltic rollers compress the tube against the tube housing to create negative pressure within the tube.

Abstract: A peristaltic pump includes a rotating member operably coupled to a drive. The rotating member includes a plurality of rollers arranged in a circular configuration. A guide member defines a channel configured to direct a peristaltic tube around the rotating member so that the peristaltic tube interfaces with the plurality of rollers. The peristaltic tube is pressed against the plurality of rollers by a retaining shoe. The retaining shoe contains surface irregularities configured to restrict movement of the peristaltic tube. A keeper braces the restraining shoe against the peristaltic tube. The rotating rollers compressing the peristaltic tube against the retaining shoe as the rotating member rotates results in a peristaltic action that produces a nearly pulse free linear flow.

Abstract: A peristaltic pump has an arcuate raceway with a partially concave inner surface extending through an arc of at least one hundred eighty degrees (180°). The arc defines a midpoint, and a rotor faces the inner surface of the raceway and is both rotatable relative to the raceway and translationally movable relative to the raceway between a pump position, wherein the rotor is spaced from the midpoint a first distance, and a tube load position, wherein the rotor is spaced from the midpoint a second distance greater than the first distance. A motor is coupled to the rotor to rotate the rotor plural are rollers arranged on the rotor to contact tubing disposed between the rotor and the raceway when the rotor is in the pump position. The motor is prevented from stopping at a predetermined angular position to facilitate loading and unloading tubing.

Abstract: Ocular surgery may be performed by a variety of systems, processes, and techniques. In certain implementations, a system and a process for ocular surgery may include the ability to draw ocular fluid into a channel of a hand-held pump system and separate the fluid into multiple compressible channels to create multiple flows. The system and the process may also include the ability to peristaltically pump the fluid through the compressible channels.

Abstract: The disclosed flow cytometer includes a wavelength division multiplexer (WDM). The WDM includes an extended light source providing light that forms an object, a collimating optical element that captures light from the extended light source and projects a magnified image of the object as a first light beam, and a first focusing optical element configured to focus the first light beam to a size smaller than the object of the extended light source to a first semiconductor detector. The disclosed flow cytometer further includes a composite microscope objective to direct light emitted by a particle in a flow channel in a viewing zone of the composite microscope to the extended light source, a fluidic system and a peristaltic pump configured to supply liquid sheath and liquid sample to the flow channel, and a laser diode system to illuminate the particle in the flow channel.

Abstract: A pump system including a pump, an inflow cassette and an outflow cassette. The inflow cassette has a damping flexible membrane covering a damping region configured to dampen pressure pulsations in washing fluid passing through the damping region. The pump has a plurality of individually actionable pressing members that can each be individually actuated to pinch one of a plurality of suction tubes of the outflow cassette to at least partially prevent fluid flow through the one of the plurality of the suction tubes.

Abstract: A peristaltic pump comprises a tube for transporting a material, wherein the tube is arranged linearly along a longitudinal axis. The peristaltic pump further comprises a pump head for causing a squeezing of the tube, wherein the pump head is rotatable about a rotation axis.

Abstract: A peristaltic pump includes a rotating member operably coupled to a drive. The rotating member includes a plurality of rollers arranged in a circular configuration. A guide member defines a channel configured to direct a peristaltic tube around the rotating member so that the peristaltic tube interfaces with the plurality of rollers. The peristaltic tube is pressed against the plurality of rollers by a retaining shoe. The retaining shoe contains surface irregularities configured to restrict movement of the peristaltic tube. A keeper braces the restraining shoe against the peristaltic tube. The rotating rollers compressing the peristaltic tube against the retaining shoe as the rotating member rotates results in a peristaltic action that produces a nearly pulse free linear flow.

Abstract: A cell culture system for the production of cells and cell derived products includes a reusable instrumentation base device incorporating hardware to support cell culture growth. A disposable cultureware module including a cell growth chamber is removably attachable to the instrumentation base device. The base device includes microprocessor control and a pump for circulating cell culture medium through the cell growth chamber. The cultureware module is removably attached to the instrumentation base device. Cells are introduced into the cell growth chamber and a source of medium is fluidly attached to the cultureware module. Operating parameters are programmed into the microprocessor control. The pump is operated to circulate the medium through the cell growth chamber to grow cells or cell products therein. The grown cells or cell products are harvested from the cell growth chamber and the cultureware module is then disposed.

Abstract: A blood supply flow rate controlling device (2), which is a device for controlling the blood supply flow rate in an extracorporeal circulation device connected to a living body (10), includes rotational frequency detecting means that detects the rotational frequency of the centrifugal pump (40) of the extracorporeal circulation device, inlet pressure detecting means and outlet pressure detecting means that detect the inlet pressure and the outlet pressure of the centrifugal pump (40), respectively, flow rate regulating means that regulates a flow rate of blood supplied to the living body by adjusting a flow path cross section area of the blood circulation circuit (20), and controlling means that controls the flow rate regulating means.

Abstract: A channel-less microfluidic pump includes a cartridge including a substrate and an actuatable film layer disposed on the substrate, and a manifold having at least three actuatable void volumes separated by a plurality of wall sections and an actuatable flexible layer disposed on the manifold interfacing the actuatable film layer. In operation, the pump can be in an unactuated state wherein the actuatable film layer is disposed against the surface of the substrate or an actuated state wherein at least a portion of the flexible layer and a corresponding portion of the actuatable film layer are deflected into a corresponding void volume thus forming a fluidic volume between the deflected portion of the actuatable film layer and the surface of the substrate. In the actuated state, there is a fluidic gap between immediately adjacent void volumes formed by a thinned region of the flexible layer at a point of contact with a top surface of a wall section.

Abstract: The present disclosure provides a linear peristaltic pump that is capable of dispensing varied amounts of liquid from a tube. The linear peristaltic pump includes an adjustably attached squashing plate that is configured to move lengthwise in the housing of the pump. The amount of liquid dispensed from a tube disposed in the pump varies based on the location of the squash plate in the housing.

Abstract: The pump is provided with a plurality of pumping chambers and electrically activatable valves. An elastic membrane is arranged in each pumping chamber and divides the same into a first and a second chamber section. Each valve is connected to the second chamber section of a pumping chamber. When a pressure drop is applied over the valve and the valve is activated (i.e. opened), the pressure in the second chamber section changes, which causes the membrane to move, which in turn leads to a change of the volumes of both chamber sections. This e.g. allows to pump well-defined amounts of fluid from the chamber sections to a drug dispensing device.

Abstract: In various embodiments, a surgical cassette, configured to engage peristaltic pump rollers, may include two or more pump segments between a sheet and a substrate coupled to the sheet. The two or more pump segments on the cassette may produce additional flow (e.g., approximately twice the flow for two segments as opposed to one) than if the cassette had only one pump segment engaging the roller. Further, in some embodiments, the two or more pump segments and rollers on the roller head may be configured to provide a flow profile in which a peak of a pulse from a first pump segment is at least partially out of phase with a peak of a pulse from the second pump segment. The combined resultant flow may then have a flow profile with pulsation amplitudes that are smaller than the individual pump segment pulsation amplitudes.

Abstract: A tubing assembly is provided that can comprise a plurality of tubes or lumens that can be disposed within a head of a peristaltic pump. The tubing assembly can provide a flow rate or volume capacity that is generally equal to or greater than that achieved with a comparable prior art tube while operating at higher pressures than that possible using the prior art tube. Further, in accordance with some embodiments, the tubing assembly can achieve a longer working life than a comparable prior art tube, and the load on the pump motor can be reduced such that the pump life is increased and/or a larger pump motor is not required to achieve such advantageous results.

Abstract: Ocular surgery may be performed by a variety of systems, processes, and techniques. In certain implementations, a system and a process for ocular surgery may include the ability to draw ocular fluid into a channel of a hand-held pump system and separate the fluid into multiple compressible channels to create multiple flows. The system and the process may also include the ability to peristaltically pump the fluid through the compressible channels.

Abstract: According to the present invention, a dialysis fluid pump comprises: a housing having an accommodating space formed therein; a dialysis fluid supply tube and a dialysis fluid recovery tube, at least a portion of each of which is accommodated in the accommodating space; a cam rotatably installed in the accommodating space; a motor for rotating the cam; and a first backflow pressure preventer and a second backflow pressure preventer adapted to be mobile in the accommodating space and be pushed by the cam. The dialysis fluid supply tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid supply tank and the other end thereof is connected to a hemodialysis filter. The dialysis fluid recovery tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid recovery tank and the other end thereof connected to the hemodialysis filter.

Abstract: In various embodiments, a surgical cassette, configured to engage peristaltic pump rollers, may include two or more pump segments between a sheet and a substrate coupled to the sheet. The two or more pump segments on the cassette may produce additional flow (e.g., approximately twice the flow for two segments as opposed to one) than if the cassette had only one pump segment engaging the roller. Further, in some embodiments, the two or more pump segments and rollers on the roller head may be configured to provide a flow profile in which a peak of a pulse from a first pump segment is at least partially out of phase with a peak of a pulse from the second pump segment. The combined resultant flow may then have a flow profile with pulsation amplitudes that are smaller than the individual pump segment pulsation amplitudes.

Abstract: A pump producing peristaltic pumping action by sequentially occluding a tube between staggered curved surfaces. The pump includes a pump frame with a platen with a plurality of curved surfaces. The curved surfaces of the platen operatively interact with opposing curved surfaces on a pressure plate assembly or the like. Pumping is accomplished via a tube sandwiched between the platen and the pressure plate assembly.

Abstract: A pressure driven apparatus comprising a housing, at least one flexible membrane located within the housing dividing the interior of the housing into at least two chambers. At least one input or exhaust cam assembly operates in conjunction with the at least one flexible membrane to provide an expansion zone within the housing. Fluid enters the housing producing movement of the flexible membrane. The flexible membrane is connected to a drive member such that the movement of the fluid within the expansion zone results in the membrane imparting a force to the drive member. The flexible membrane includes seals used to maintain a dynamic and movable seal with respect to the housing.

Abstract: The invention provides, in various embodiments, systems, devices and methods relating to ex-vivo organ care. In certain embodiments, the invention relates to maintaining an organ ex-vivo at near-physiologic conditions.

Abstract: A hose pump for delivering fluids includes a housing having a base body and a cover. A pump body for delivering a fluid is rotatably disposed in the interior of the base body about an axis. A locking device is disposed on the housing in order to release and lock the cover. The pump body comprises a plurality of rollers disposed at the circumference of the pump body and delivering a fluid present in a hose by rotating the pump body. The rollers clamp the hose against an inner surface of the cover, and the locking device is attached captively to the base body and displaceably relative to the base body, and can be actuated single-handedly. The cover is attached captively to the base body and displaceably relative to the base body of the housing, and can be actuated single-handedly.