Abstract: A pump for moving a fluid through a fluidics system includes a surface and channel disposed along at least a portion of the surface. The pump also includes a driving mechanism having a rotatable shaft and a plurality of haptics operably coupled to the shaft. A closed portion is formed in the channel as the channel is compressed between the surface and at least one of the haptics, the closed portion having a thickness between the surface the haptic. The pump additionally has a circular path and a shaft path. The haptics are completely disposed inside the circular path and traversing the circular path during operation of the driving mechanism. The shaft path is traversed by shaft during operation of the driving mechanism, such at least one of the haptics is always in contact with the channel. The surface has a radius of curvature in the vicinity of the closed potion that is greater than the sum of a radius of the circular path and the thickness of the closed portion.

Abstract: The peristaltic pump (1) comprises a rotor with rollers, a mobile jaw having an open position and a closed position, and further comprises, on each side of the rotor, a locating member for said tube adapted to receive it when it is pressed in and to allow it to slide in the longitudinal direction in which the locating member extends, said locating members being disposed in a line between the rotor and the mobile jaw in the open position.

Abstract: A pump system selectably and dynamically controls the flow rate of a fluid being delivered to a patient's body over a wide range of flow rates. The pump system includes an infusion tubing, a pumping mechanism, a motor drive assembly in mechanical communication with the pumping mechanism, a user input control, and an electronic controller in electrical communication with and at least partially controlling the motor drive assembly. The electronic controller include a digital signal processing controller in electrical communication with the motor drive assembly that is configured to receive a signal from the user input control and to cause power to be supplied to the motor drive assembly in response at least partially to the signal from the user input control. The pump system may selectably deliver fluid at rates from about 1 milliliter per hour to at least about 3000 milliliters per minute.

Abstract: A pump suitable for use in a portable domestic is also disclosed. The steam cleaner has a housing accommodating a releasable water tank. The pump transfers water from the tank to a boiler for generating steam. In use, steam exits a nozzle for cleaning etc.

Abstract: The peristaltic pump is provided with a two-piece housing (2, 3), in which a conveying member (1) as well as a pump tubing section (6) squeezable by the conveying member is received. For fixing the pump tubing section (6) in the housing (2, 3), a tubing holder (4) is provided. Further provided is a connecting element (5) provided with duct shaped connecting sockets (14a, 14b) for connecting tubing sections (15a, 15b). For connecting the pump tubing section (6) to the tubing holder (4), the two ends of the particular pump tubing section (6) are fixed in receptacles (10a, 10b) of the tubing holder (4), which positively enclose the outside of the pump tubing section (6). The connecting element (5) is fixed to the tubing holder (4) by means of a snap-on connection. Thereby, the connecting sockets (14a, 14b) thereof are sealingly connected to the particular pump tubing section (6).

Abstract: The invention can be used for reversible pulsationless rotor high-pressure machines which can operate in pump and in motor mode. The inventive machine comprises a working chamber and an additional working chamber, separating jumpers and regulating elements. Said regulating elements are connected to each other with the aid of a kinematic link in such a way that the motion of one regulating element initiates the motion of another regulating element. Working cavity of said working chambers are arranged in an axial direction oppositely to each other and connected to each other by means of channels. A mechanism setting an axial relative position of displacers is embodied in such a way that it always provides a sliding contact of at least one displacer with each regulating element. Said invention makes it possible to extent the functional capabilities of similar rotor machines and improve the operational parameters thereof.

Abstract: A pump set for use with a pump to deliver a supply of liquid to a patient. The feeding set has a conduit for the nutrient liquid and a safety interlock device associated with the conduit. The pumping apparatus has a pumping device and a control system for controlling operation of the pump. An electromagnetic radiation source is operatively connected to the control system of the pump for emitting an electromagnetic radiation signal in a direction for striking the safety interlock device of the feeding set. The safety interlock device is adapted to affect the direction of the electromagnetic radiation. An electromagnetic radiation detector is operatively connected to the control system for receiving the electromagnetic radiation signal when the direction is affected by the safety interlock device, and providing an indication to the control system that the feeding set conduit is properly positioned in the feeding pump.

Abstract: A pump leak monitor for use with a peristaltic pump comprises a pump housing and a pair of electrical contacts disposed along a bottom end of the pump housing. The electrical contacts are located such that the contacts are immersed in fluid when the pump is leaking. The fluid conducts electricity across the contacts and thereby closes an electrical circuit for providing an indication that a leak has been detected. By measuring an electrical parameter in the circuit, the pump leak monitor is capable of measuring the conductivity of the fluid in the pump housing. As a result, the pump leak monitor is capable of differentiating between different types of fluid.

Abstract: A tube is provided for use in a peristaltic pump, with the tube including a cylindrical wall defining a hollow interior and a cylindrical outer surface. The tube further includes a longitudinal centerline axis and a plurality of indicia applied to the cylindrical outer surface, with the indicia including first and second indicium extending transversely to the longitudinal centerline axis. The second indicium is longitudinally spaced from the first indicium by a predetermined distance.

Abstract: A flexible tube has a first portion and a second portion located close to each other in the vicinity of an opening of an accommodating case. A pressing member moves from the first portion to the second portion along the tube while pressing a portion of the tube. An auxiliary member is provided in the vicinity of the opening of the case. The auxiliary member has an auxiliary surface. When the pressing member passes the vicinity of the opening of the case, the auxiliary member transfers the pressing member from the second portion to the first portion via the auxiliary surface. This structure ensures a silent operation of the tube pump.

Abstract: A pump having a rotary portion which compels the movement of a fluid by peristaltic compression of resilient tubing containing the fluid includes a roller assembly having at least one roller mounted in the rotary portion of the pump for contact with the resilient tubing. The roller has a range of rotation in contact with the tubing during pump operation. A roller control mechanism is adapted and constructed to stop the roller at a single, predetermined location on the tubing when the pump operation is stopped.

Abstract: An infusion pump has a housing (10) accommodating a pump finger mechanism (12). The pump finger mechanism (12) acts on a pump hose (13) fastened at holders (16, 21) of the housing. The pump hose (13) is supported by a door (24). In order to facilitate proper and positionally correct placement of the pump hose, one of the holders (16) includes an oblique pin. The associated transition piece (15) of the pump hose (13) has a hole (18) with the same inclination angle as the oblique pin. The other transition piece (20) is of a different structure so that the transition pieces cannot be mixed up. A longitudinal color strip (29) on the pump hose is provided to visually indicate any twisting of the hose.

Abstract: A roller pump comprises a pump housing having a cylindrical inner surface, a rotor fixed to a drive shaft placed at the central portion of the pump housing, rollers provided around the rotor and a driver for driving the drive shaft through a reduction gear. The rollers press an elastic tube installed between the rollers and the inner surface of the pump housing to transfer a liquid in the elastic tube by rotation of the rotor. The pump housing and the reduction gear are integrated into one body and an output shaft of the reduction gear is fixed to the drive shaft of the rotor. A stepping motor is used as the driver. A part of the inner surface of the pump housing is composed of a semicircle, another part of the inner surface is composed of a partial circle of which center is shifted from the center of the semicircle.

Abstract: A pump leak monitor for use with a peristaltic pump comprises a pump housing and a pair of electrical contacts disposed along a bottom end of the pump housing. The electrical contacts are located such that the contacts are immersed in fluid when the pump is leaking. The fluid conducts electricity across the contacts and thereby closes an electrical circuit for providing an indication that a leak has been detected. By measuring an electrical parameter in the circuit, the pump leak monitor is capable of measuring the conductivity of the fluid in the pump housing. As a result, the pump leak monitor is capable of differentiating between different types of fluid.

Abstract: A battery operated self-contained submersible liquid dispenser for dispensing discrete quantities of a liquid from a remote liquid reservoir is provided. The dispenser comprises a hermetically sealed walled housing containing a peristaltic pump driven either directly or via a speed reduction gear train by an electric motor in response to motor activation signals received from an electric control circuit within the housing. The pump includes a flexible liquid dispensing tube connected to respective liquid inlet and liquid outlet ports extending through the wall of the housing, a pump actuator for forcing liquid received via the liquid inlet port through the tube to the outlet port, and a sensor on or in the wall of the housing connected to the circuit. The sensor is adapted to sense a changed condition from a required parameter external to the housing, e.g.

Abstract: A tube pump (1A) of the present invention is provided with a main body (2) to which a tube (100) is attached, a rotor (5), an oscillator (6) located so as to touch an outer circumferential face of the rotor (5), and a plurality of rollers (10) mounted to the rotor (5) for pressurizing and thereby squeezing the tube (100). The oscillator (6) is essentially shaped like a rectangular plate, and is formed by laminating an electrode, a piezoelectric element, and a reinforcing plate. When an alternating current voltage is applied to the piezoelectric element, the oscillator (6) oscillates longitudinally in the direction of the length at minute amplitude as the piezoelectric element expands and contracts. The rotor (5) receives a frictional force and a pressing force from a convex portion (66) when the oscillator (6) expands, and the rotor (5) rotates as it repetitively receives the frictional force and the pressing force.

Abstract: A fluid delivery system is provided having a disposable fluid reservoir that is integral with, and supported by, a pump housing. A peristaltic pump head is mounted within the pump housing. A length of flexible tubing is operatively engaged by the peristaltic pump, and includes a first end arranged in flow communication with the fluid reservoir and an accessible second end. A central portion of the tube is operatively engaged by the peristaltic pump head so that consecutive portions of the flexible tubing are successively collapsed to thereby propel fluid through the tubing so as to exit the second end. The disposable cartridge is preferably mateable with a recess in a base housing. A transmission system is mounted within the recess of the base housing and arranged to operatively engage the peristaltic pump head. A control module is disposed in control communication with the transmission system for selective operation of the fluid delivery system.

Abstract: A piston pump propels liquid through a lumen of a flexible tube segment. The pump includes a first tube clamping member, a first set of tube squeezing members, a second tube clamping member, a second set of tube squeezing members and a synchronizing arrangement for activating the members in a sequential order such that fluid in the tube is displaced in a downstream direction.

Abstract: A pump for moving a fluid includes an actuator housing having a chamber for housing the fluid. The chamber has ports for accommodating fluid flow through the chamber. A plurality of individual actuators are located in the chamber and in contact with the fluid. Completing the pump is an actuator for sequentially activating individual actuators, wherein each actuator, when activated, changes dimensions and exerts a displacing force on the housed fluid.

Abstract: Various kinds of fluid can be handled and delivered accurately in infinitesimal amounts through microchannels formed in an elastic polymeric substrate by periodically squeezing selective portions of the microchannel using a rotor to apply an external force on the elastic substrate. The delivery rate of the fluid is in the range from pL/sec to mL/sec determined by the rotation speed of the rotor which presses the microchannels and the dimensions of the microchannel. Regardless of physical properties of the fluid to be delivered, various kinds of fluids can be accurately delivered through the microchannels in the desired amount.

Abstract: A fluid delivery system is provided having a disposable fluid reservoir that is integral with, and supported by, a pump housing. A peristaltic pump head is mounted within the pump housing. A length of flexible tubing is operatively engaged by the peristaltic pump, and includes a first end arranged in flow communication with the fluid reservoir and an accessible second end. A central portion of the tube is operatively engaged by the peristaltic pump head so that consecutive portions of the flexible tubing are successively collapsed to thereby propel fluid through the tubing so as to exit the second end. The disposable cartridge is preferably mateable with a recess in a base housing. A transmission system is mounted within the recess of the base housing and arranged to operatively engage the peristaltic pump head. A control module is disposed in control communication with the transmission system for selective operation of the fluid delivery system.

Abstract: The usefulness of an item or a process is largely a function of its cost. The perfect historical example of this is the cotton gin. This cheap machine so lowered the labor cost of removing the seeds from cotton fibers that cotton cloth became commonplace. This, among other things, helped fuel the industrial revolution. Likewise, the cost of building a home of concrete covered 3-d panels is out of the reach of most retired Americans in year 2002. The labor cost of applying concrete to these panels by trowels is prohibited. Also, the cost of using a Shotcrete system prices a 3-d panel home out of the reach of most retirees. This invention creates a Shotcrete pump for less than $2000. and can be built by any low skilled “weekend dabbler” using handtools. With this machine the house payment of a snug safe home costs $180 per month.

Abstract: A surface arrangement (30) adapted for use in a travelling volume pump. The pump (50) has a pumping chamber defined between first and second opposed pumping chamber surfaces (52, 54), which extend from an inlet to an outlet of the pump in a pumping direction (58). The surface arrangement (30) includes a plurality of flexible ridges (32) inclined in the pumping direction (58) and forming one or more of the first and second pumping chamber surfaces (52, 54). The ridges (32) span across the one or more pumping chamber surfaces (52, 54) in a direction generally transverse to the pumping direction (58) and have distal peaks (34) adapted to abut and substantially seal against the opposed second pumping chamber surface in the presence of a localised force displacing one of the first or second pumping chamber surfaces (52, 54) towards the other of the first or second pumping chamber surfaces (52, 54).

Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. At least two biasing members are operably connected to the roller to bias the roller against the tube, the two biasing members forming an angle.

Abstract: A tubing installation checking device is provided for determining proper installation of a tubing along a tube receiving channel in a peristaltic pump of the type having a tube receiving channel and a door for holding a tubing therein. The tubing installation checking device includes a pressure sensor held in the peristaltic pump positioned along the tube receiving channel downstream from the pumping mechanism for sensing pressure in the tubing and for providing a signal representing the sensed pressure. A valve is provided held in the peristaltic pump along the tube receiving channel downstream from the pressure sensor for closing the tubing when it is installed in the tube receiving channel.

Abstract: An infusion pump has a housing (10) accommodating a pump finger mechanism (12). The pump finger mechanism (12) acts on a pump hose (13) fastened at holders (16, 21) of the housing. The pump hose (13) is supported by a door (24). In order to facilitate proper and positionally correct placement of the pump hose, one of the holders (16) includes an oblique pin. The associated transition piece (15) of the pump hose (13) has a hole (18) with the same inclination angle as the oblique pin. The other transition piece (20) is of a different structure so that the transition pieces cannot be mixed up. A longitudinal color strip (29) on the pump hose is provided to visually indicate any twisting of the hose.

Abstract: A peristaltic depositing machine includes a hopper to store viscous material. A flexibly deformable tubing section is connected to the hopper for receiving the viscous material. A pair of rollers cooperate to compress tubing section and thereafter move forwardly along the tubing section such that the viscous material is forwardly propagated. A manifold is connected between the hopper and the tubing section to transmit the viscous material there between. A flow control unit is connected to a portion of the tubing section forward of the pair of rollers. The flow control unit alternately constricts and unconstricts the portion of the tubing section in synchronism with the forward movement by the pair of rollers. A nozzle is connected to an output end of said tubing section to shape the viscous material upon output. A carriage is also connected to an output end of the tubing section and moves about a predetermined travel path to thereby direct an output location of the viscous material.

Abstract: Inverted peristaltic pumps and related apparatus/methods wherein one or more compressible pump tubes are formed or mounted on a core member and one or more tube compressing members move about the core member so as to compress the tube(s) and propel a fluid through the tube(s). The core member may be removable and the pump tube(s) may be pre-mounted on the core member to form a disposable or reusable tubing cartridge. The core member or tubing cartridge may be easily inserted into and removed from the pump. In some embodiments troughs or grooves may be formed on the core member and the tube(s) may be disposed in such troughs or grooves.

Abstract: A peristaltic compressor suitable for relaxation-free compression of polarized gas including a pumping rotor driven by a motor provided with a plurality of rollers, and at least a tube, wherein the rotor and the tube(s) is(are) placed in a depressurized chamber having a lower pressure than atmospheric pressure, and wherein the motor is formed by at least one tube fed by a pressurized fluid, driving into rotation a peristaltic rotor provided with rollers, coupled with the pumping rotor.

Abstract: A soap dispensing system includes non-pressurized first and second soap containers connected to a soap manifold. The manifold has a first inlet connection to the first soap container and a second inlet connection to the second soap container. There is a soap outlet on the manifold. A soap conduit extends from a first dispensing opening on the manifold to a second dispensing opening on the manifold. A two direction peristaltic pump is associated with the soap conduit to move soap either from the first dispensing opening to the second dispensing opening or in the opposite direction. There are valves within the soap manifold for connecting the first inlet, first dispensing opening, second dispensing opening, second inlet opening, and the outlet to provide soap, upon operation of the pump, from one of said containers, through said soap conduit, to the manifold outlet.

Abstract: Various kinds of fluid can be handled and delivered accurately in infinitesimal amounts through microchannels formed in an elastic polymeric substrate by periodically squeezing selective portions of the microchannel using a rotor to apply an external force on the elastic substrate. The delivery rate of the fluid is in the range from pL/sec to mL/sec determined by the rotation speed of the rotor which presses the microchannels and the dimensions of the microchannel. Regardless of physical properties of the fluid to be delivered, various kinds of fluids can be accurately delivered through the microchannels in the desired amount.

Abstract: A peristaltic pump comprises a housing (2) in which a peristaltic action is applied to a tube (6) by a rotor (4). The tube (6) has locating means in the form of flanges (16) at each end, which ensure proper positioning of the tube (6) within the housing (2). The housing (2) makes a fluid-tight seal with the flanges (16) so that the interior of the housing (2) is isolated from the ambient surroundings. The flanges (16) are non-circular and fit in complementary recesses (30), (32) in the housing (2) so that, when installed, the tube (6) is not twisted between its ends.

Abstract: An implantable drug infusion device includes a pumphead assembly and a motor assembly operably connected to the pumphead assembly. The motor assembly is adjacent to and laterally offset from the pumphead assembly, advantageously reducing the overall height of the implantable drug infusion device.

Abstract: A hose cassette (1), for a peristaltic pump (2), includes a cassette housing (3) and a flexible hose (4) extending through cassette housing (3). The hose (4) is guided in the cassette housing (3) along a circular segment. The cassette housing (3) has a cutout (5) for the engagement of a roller wheel (6) of a peristaltic to pump (2) into the interior of said circular segment. The hose cassette has connection elements (7), (8) for connecting the cassette housing (3) to the peristaltic pump (2). At least one hose leg (9), (10) to be connected to the circular segment is displaceably held between a mounting position and an operating position in the cassette housing (3).

Abstract: Inverted peristaltic pumps and related apparatus/methods wherein one or more compressible pump tubes are formed or mounted on a core member and one or more tube compressing members move about the core member so as to compress the tube(s) and propel a fluid through the tube(s). The core member may be removable and the pump tube(s) may be pre-mounted on the core member to form a disposable or reusable tubing cartridge. The core member or tubing cartridge may be easily inserted into and removed from the pump. In some embodiments troughs or grooves may be formed on the core member and the tube(s) may be disposed in such troughs or grooves.

Abstract: A roller pump comprises a pump housing having a cylindrical inner surface, a rotor fixed to a drive shaft placed at the central portion of the pump housing, rollers provided around the rotor and a driver for driving the drive shaft through a reduction gear. The rollers press an elastic tube installed between the rollers and the inner surface of the pump housing to transfer a liquid in the elastic tube by rotation of the rotor. The pump housing and the reduction gear are integrated into one body and an output shaft of the reduction gear is fixed to the drive shaft of the rotor. A stepping motor is used as the driver. A part of the inner surface of the pump housing is composed of a semicircle, another part of the inner surface is composed of a partial circle of which center is shifted from the center of the semicircle.

Abstract: A peristaltic pump with three coaxial cylindrical components; a high-modulus rod contained within a piezoelectric tube, which in turn is contained within a cylindrical pressure casing, which may the casing of a hydraulic cylinder. The casing is filled with ERF. The piezoelectric tube has a plurality of electrode bands attached to its outer surface and is coated on its interior with an electrically conductive material. The electrodes are voltage-activated to cause certain portions of the tube to expand and others to contract, resulting in peristaltic action. The applied voltage also causes the ERF to form a gel state both inside and outside of the piezoelectric tube.

Abstract: A linearized peristaltic pump has a substantially circular elastomeric tube (30) clamped within a pump housing (1) and a plurality of tube-engaging rollers (40) adapted to compress the tube (30) to pump fluid from an inlet end (33) to an outlet end (34). The tube (30) is clamped longitudinally by a circlip (35) so as to have a flattened clamped part (31) and a bulbous unclamped part (32) which is engaged by the rollers (40). The rollers (40) are mounted on the outer ends of spring-loaded rotor arms (42) and move on a cam track (50) to alter the compression of the tube (30) progressively in a tube-encountering sector (E-B) and a tube-releasing sector (C-A).

Abstract: The pressure rollers of a peristaltic tube positive displacement pump are incorporated as an element of a reduction system connecting a drive shaft to the rollers.

Abstract: A system for increasing the volumetric flow uniformity of fluid pumped through a conduit by an infusion pump. A pumping mechanism operates in identifiable step movements that are broken down into microstep movements that are then grouped into packets. The pumping mechanism controls the period of each microstep, so that the sum of the microstep periods in a packet is essentially equal to the packet period, with little or no waiting time on the motor. The motor preferably begins moving the assigned microsteps in each packet immediately upon the beginning of the time period, but controls the period of the microsteps for that packet.

Abstract: A peristaltic compressor suitable for relaxation-free compression of polarized gas including a pumping rotor driven by a motor provided with a plurality of rollers, and at least a tube, wherein the rotor and the tube(s) is(are) placed in a depressurized chamber having a lower pressure than atmospheric pressure, and wherein the motor is formed by at least one tube fed by a pressurized fluid, driving into rotation a peristaltic rotor provided with rollers, coupled with the pumping rotor.

Abstract: The apparatus comprises a displacement pump with at least one flow vessel, with a pump drive, and with a support means for holding the flow vessel. Furthermore, the apparatus comprises a measuring arrangement responsive to the displacement motions performed by the flow vessel, wherein said displacement motions are picked up by a pressure sensor diposed at the flow vessel or by a strain sensor disposed at the support means. The measuring arrangement serves to sense an actual displacement motion of the flow vessel robustly and reliably, and to deliver a measurement signal representative of this motion. The signal is particularly suited for generating a flow rate estimate representative of the instantaneous volume flow rate and/or for generating a status signal signaling a current operational status. Further, a method is disclosed which supplies information serving to monitor such an apparatus. The apparatus is suitable for using in a sampler.

Abstract: Pumping apparatus is provided for separating liquids from solids in a mixture thereof, the apparatus preferably being of the peristaltic type with a cage with rollers circumferentially spaced around its periphery rotable within a casing, there being at least two flexible tubes extending around the cage, a first, evacuation tube having an inlet end held open within the casing and an opposite end connected to a first outlet in the casing and a second pumping tube extending between an inlet in the casing adapted to be connected to a liquid to be pumped and a second outlet from the casing, whereby upon rotation of the cage, e.g. by an electric motor, a negative pressure will be generated within the casing and the liquid will be pumped through the apparatus. For separating solids suspended in/mixed with the mixture being pumped, an electrical or electrostatic charge is introduced into the mixture.

Abstract: A system for increasing the volumetric flow uniformity of fluid pumped through a conduit by an infusion pump. A pumping mechanism operates in identifiable step movements that are broken down into microstep movements that are then grouped into packets. The pumping mechanism controls the period of each microstep, so that the sum of the microstep periods in a packet is essentially equal to the packet period, with little or no waiting time on the motor. The motor preferably begins moving the assigned microsteps in each packet immediately upon the beginning of the time period, but controls the period of the microsteps for that packet.

Abstract: A liquid colorant system for a plastic molding machine includes a plurality of interconnected tube structures, a tank containing the liquid colorant, and a peristaltic pump. The pump drives a flow of the liquid colorant from the tank to a valve through a delivery tube and a peristaltic tube. During ordinary operation, the valve allows the liquid colorant to flow into the molding machine through a feed tube. However, the valve can be shifted to allow air to be purged through a purge tube, bypassing the feed tube and the machine.

Abstract: A system for increasing the volumetric flow uniformity of fluid pumped through a conduit by an infusion pump. A pumping mechanism operates in identifiable step movements that are broken down into microstep movements that are then grouped into packets. The pumping mechanism controls the period of each microstep, so that the sum of the microstep periods in a packet is essentially equal to the packet period, with little or no waiting time on the motor. The motor preferably begins moving the assigned microsteps in each packet immediately upon the beginning of the time period, but controls the period of the microsteps for that packet.