Abstract: An infusion pump includes: infusion-tube pressing parts configured to press a flexible infusion tube; an infusion-tube receiving surface configured to serve as a receiving surface when the infusion-tube pressing parts press the infusion tube; and a restoration device provided between the infusion-tube pressing parts, the restoration device being configured to move together with the infusion-tube pressing parts along the infusion-tube receiving surface and to press two sides of the infusion tube pressed by the infusion-tube pressing parts, wherein the infusion-tube pressing parts is configured to move sequentially in a longitudinal direction of the infusion tube along the infusion-tube receiving surface to deliver a liquid in the infusion tube in one direction while pressing the infusion tube by sandwiching the infusion tube with the infusion-tube receiving surface.

Abstract: An infusion device (3) comprises a housing element (30) having a receptacle (301) for receiving a pump module (1), and a pump actuation mechanism (2) having a wobbling device (20) arranged on the housing element (30) and a drive shaft (21) being rotatable about a rotational axis (A). The wobbling device (20) is actuatable, by rotating the drive shaft (21) about the rotational axis (A), to perform a tumbling motion with respect to the receptacle (300) for acting onto the pump module (1) received in the receptacle (300) in order to pump a fluid through the pump module (1). Herein, the wobbling device (20) is displaceable along at least one direction (X, Y) transverse to the rotational axis (A) with respect to the receptacle (300).

Abstract: A peristaltic micropump includes one or more flexible channels configured to transfer one or more pumped fluids, and an actuator configured to engage the one or more flexible channels and rotate about a central axis. The actuator includes a plurality of rolling elements and a driving element configured such that the driving element operably rotates about the central axis and each rolling element operably rolls about a respective axis that is not parallel to the central axis. The plurality of rolling elements is disposed between the one or more flexible channels and the driving element. The driving element includes a cage configured to capture the plurality of rolling elements such that the plurality of rolling elements is located at different radii from a center of the cage.

Abstract: A roller assembly comprises a central section with a hub; a plurality of arms coupled to the central section such that each arm is capable of moving independently with respect to the central section; a plurality of spring pins, one spring pin associated with each arm; a plurality of retaining pins, one retaining pin associated with each arm; and a plurality of rollers, one roller coupled to each arm.

Abstract: A peristaltic pump head includes a housing assembly adapted for mounting to a drive mechanism, a roller assembly arranged with the housing assembly and a flexible conduit extending through the housing assembly and engageable by the roller assembly to impel fluid therethrough. The roller assembly and the flexible conduit are removable from the housing assembly without disconnecting the entire housing assembly from the drive mechanism. The roller assembly can include an axially extending drive shaft, a roller control body fixedly mounted to the drive shaft, at least a first end plate rotatably mounted about the drive shaft, and at least a first roller arm pivotably mounted to the first end plate. The flexible conduit can include a length of hollow tubing made of an elastomeric material, and at least one overmolded end fitting made of a rigid polymeric material and fused to an end of the hollow tubing.

Abstract: A roller assembly comprises a central section with a hub; a plurality of arms coupled to the central section, each arm having a radial section, an arcuate section, and a bent section; and a plurality of rollers, one roller coupled to the bent section of each arm. The arms may be flexible such that the rollers are capable of moving with respect to the central section when the arms flex. The rolling surface of the rollers is arranged to engage a polymer sheet or flexible tubing throughout travel of the arms.

Abstract: A roller assembly comprises a central section with a hub; a plurality of spring assemblies coupled to the central section; a plurality of arms coupled to the central section such that each arm is capable of pivoting independently with respect to the central section; and a plurality of rollers, one roller coupled to each of the plurality of arms. Each roller may be coupled to each arm with a pin.

Abstract: A roller assembly comprises a central section with a hub; a plurality of flexible arms coupled to the central section; a plurality of spring pins, one spring pin coupled to each of the plurality of flexible arms; a plurality of arms coupled to the central section such that each arm is capable of pivoting independently with respect to the central section; and a plurality of rollers, one roller coupled to each of the plurality of arms.

Abstract: A roller assembly comprises a central section with a hub, the central section having a plurality of pivots located around the central section; a plurality of arms, each arm having a roller end and a pivot end, the pivot ends coupled to the central section at the plurality of pivots such that each arm is capable of pivoting independently with respect to the central section, the roller ends and pivot ends of each arm located a distance of at least one roller width away from each other; a plurality of rollers, one roller coupled to each of the roller ends of the plurality of arms; wherein the plurality of rollers and arms are located around the central section such that the pivot is located a distance away from the roller.

Abstract: A hose compressed peristaltic pump is provided. The pump includes a base, a sidewall structure mounted on the base, and forming a containing space therein, a rotor having a center in the space and further having plural integral protrusions, and a hose disposed between the protrusions and the sidewall structure.

Abstract: A liquid pumping apparatus comprising a rotor housing, a rotor having at least one roller, to be rotated by a prime mover, an inner periphery wall of the rotor housing, a flexible tube to be inserted into a gap formed between the rotor and the inner periphery wall and squeezed when the rotor is rotated so as to transfer a liquid fed into the tube, and a deformable guide for guiding the flexible tube in a moving path of the roller. At least one portion of the inner periphery wall is movable so as to approach or separate from the rotor.

Abstract: A tube holder (105) for use with a peristaltic pump includes a housing having a recess (165) for receipt of a pump rotor and a tube race around the recess. The tube race has a first race part and a second race part, a first tube inlet (167a) into the first race part and a first tube outlet (167b) from the first race part, a second tube inlet (167c) into the second race part and a second tube outlet (167d) from the second race part. The tube is insertable in the tube race by movement in a substantially orthogonal direction relative to the tube race so that it extends in through the first tube inlet (167a), around the first race part, out through the first tube outlet (167b), in through the second tube inlet (167c), around the second race part, and out through the second tube outlet (167d).

Abstract: A cassette having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The flow channel projects outwardly from the exterior of the cassette so that a peristaltic pump having pump head rollers mounted radially from the axis of rotation of the pump motor compress the elastomeric flow channels against the rigid substrate during operation.

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 peristaltic pump mechanism comprises a base plate (11) having a generally planar surface for supporting a pump tube (12) to extend at least partially around a circular path defined on said surface, an operating section (10) connectable to the base member (11). At least one rotatable pumping element (21) is mounted on the operating section (10) locally to compress the pump tube (12) and roll around the circular path when the operating section (10) is connected to the base member. A power drive causes the pumping element (21) to roll around the circular path, the pumping element (21) being of conical shape and mounted on the operating section (10) so that the axis of the element is substantially co-incident with the centre of the circular path. In this way essentially no slippage takes place between the pumping element and the base plate.

Abstract: A peristaltic pump mechanism comprises a base plate (11) having a generally planar surface for supporting a pump tube (12) to extend at least partially around a circular path defined on said surface, an operating section (10) connectable to the base member (11). At least one rotatable pumping element (21) is mounted on the operating section (10) locally to compress the pump tube (12) and roll around the circular path when the operating section (10) is connected to the base member. A power drive causes the pumping element (21) to roll around the circular path, the pumping element (21) being of conical shape and mounted on the operating section (10) so that the axis of the element is substantially co-incident with the centre of the circular path. In this way essentially no slippage takes place between the conical surface of the pumping element and the planar surface of the base plate.

Abstract: In a tube pump, a rotor is fixed to a drive shaft so as to rotate therewith. A tube pressing member is swingable in an axial direction of the drive shaft. A swinging member swings the tube pressing member in accordance with the rotation of the rotor. An upper outer face of a tube is fixed to a lower portion of the tube pressing member. A lower outer face of the tube is fixed to a fixing member. The tube is forcibly pressed and expanded in accordance with the swing motion of the tube pressing member, while the pressed/expanded part is shifted in an extending direction.