A peristaltic pump that reduces electrical current flowing through a pumping tube segment includes a central rotor mounted on a central rotation axis, a shoe with a curved surface facing toward the central rotor, multiple rollers mounted along the circumference of the central rotor and the pumping tube segment positioned between the curved surface and the central rotor. Each roller of the plurality of rollers is a member of a roller group, each roller group includes at least two rollers, rollers in a particular roller group are physically located closer to each other than to rollers in other roller groups, and at least two rollers pinch a portion of the pumping tube segment against the curved surface through a full rotation of the central rotor.

The present invention relates to a fluid handling device which can prevent an inclination of a rotary member. The fluid handling device includes a substrate; an arc-shaped groove having a central angle more than 180° disposed on the substrate; a first protrusion located between both ends of the groove in the same circumference as the arc-shaped groove; a second protrusion disposed in the groove; and a film joined on the substrate so as to cover the groove, the first protrusion and the second protrusion. The groove closed by the film functions as a rotary membrane pump.

The present invention relates to a fluid handling device which can prevent an inclination of a rotary member. The fluid handling device includes: a substrate; a circular first groove disposed on the substrate; a second groove connected to the first groove; a third groove connected to the first groove; a film joined to the substrate so as to cover the first groove, the second groove and the third groove; and a joining area where the film and the bottom of the first groove is joined, the joining area being disposed between a connecting portion of the second groove and a connecting portion of the third groove in the first groove. The surface of the film in the joining area is located closer to the bottom of the first groove than the surface of the film in an area joined to the substrate of the film.

A pump is provided that includes a tube 1, tube rotors 21A, 21B, and 21C in contact with the tube 1, a case 3 containing the tube 1 and tube rotors 21A, 21B, and 21C, and a drive apparatus 10 that rotates the tube rotors 21A, 21B, and 21C from outside the case 3 without contacting the tube rotors 21A, 21B, and 21C.

The present invention provides a water-pumping device and a hairdressing device. The water-pumping device is connected to a liquid storage device to deliver liquid in the liquid storage device, and includes a chamber for containing the liquid and a squeezing device. Two ends of the chamber are communicated with a first water delivery channel and a second water delivery channel respectively, the first water delivery channel is connected to the liquid storage device, and a wall surface of the chamber is at least partially made of a deformable material, and the squeezing device periodically squeezes the deformable material from one end of the chamber to the other end thereof to make the first water delivery channel pump water and the second water delivery channel deliver water. No hose is provided in the chamber so that the number of components is reduced and the overall structure is simplified.

The present disclosure provides apparatuses and methods related to a high pressure processing device that is configured to simplify batch processing. In an embodiment, a high pressure processing device includes a processing module configured to reduce a particle size of a material or achieve a desired liquid processing result for the material, a pump configured to pump the material to an inlet of the processing module, a recirculation pathway configured to recirculate the material from an outlet of the processing module back to the pump, an input device configured to receive at least one user input variable, and a controller configured to (i) determine a number of pump strokes for the pump based on the user input variable, and (ii) control the pump according to the determined number of pump strokes so that the material makes a plurality of passes through the processing module.

A conveying device at least for conveying a conveying medium, includes at least one first conveying space, with at least one second conveying space, with at least one elastically deformable conveying element which delimits at least the first conveying space, and with at least one third conveying space. The at least the conveying element is embodied in spring-elastic fashion.

A peristaltic pumphead comprising a pumphead housing accommodating a pumping tube, an end of the tube being provided with an end fitting having a through passage and an abutment shoulder and a threaded shank extending from the abutment shoulder into the tube the tube end abutting the abutment shoulder and being accommodated in an opening, in the pumphead housing, the abutment shoulder abutting the housing at the opening, and the end fitting being engaged by a retaining element to retain the abutment shoulder against the housing.

A dual-head, pulseless peristaltic-type pump comprises a pump housing, cover, two compressible tube chambers and two sets of rotatable occluding members. An off-center drive axis driven by motor or other rotational mechanism rotate inner large diameter disk. Balls or rollers between inner disk rotate in one direction from center drive axis where the outer ring is stationary and occludes the tube by linear motion without friction between tube and outer ring. The linear roller occluding motion transfers liquid or slurry from inlet to outlet of tube. In one embodiment, two separate sets of occluding members are installed 180 degree opposite to each other such that pulsations are compensated for and canceled out.

A peristaltic pump with an oscillating drive 14 and a diverter valve 5, having a cylindrical pump housing 2 and the ports 4 and 12 are arranged in a end wall. The ports 4 and 12 are alternately used as outlet and inlet, controlled by the diverter valve 5 and in dependence on the pivot direction of the pump head 7. The roller or the sliding shoe 8 constantly flattens the pump hose and in this way, forms an annular space that is distinguished into a suction and compression chamber. Due to the constant contact of the roller or the sliding shoe 8, a sudden space enlargement is prevented according to the invention.