WO2019106185A1 - Cassette de pompe péristaltique - Google Patents

Cassette de pompe péristaltique Download PDF

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Publication number
WO2019106185A1
WO2019106185A1 PCT/EP2018/083219 EP2018083219W WO2019106185A1 WO 2019106185 A1 WO2019106185 A1 WO 2019106185A1 EP 2018083219 W EP2018083219 W EP 2018083219W WO 2019106185 A1 WO2019106185 A1 WO 2019106185A1
Authority
WO
WIPO (PCT)
Prior art keywords
cassette
peristaltic pump
tube
removable
head
Prior art date
Application number
PCT/EP2018/083219
Other languages
English (en)
Inventor
Christophe Blanc
Original Assignee
Christophe Blanc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Christophe Blanc filed Critical Christophe Blanc
Publication of WO2019106185A1 publication Critical patent/WO2019106185A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the present invention pertains to the field of the peristaltic pumps.
  • the invention relates to a peristaltic pump cassette and its support.
  • Peristaltic pump is a displacement pump used for pumping a variety of fluids.
  • the fluid is contained within a flexible tube fitted inside a circular pump casing.
  • a rotor with a number of rollers attached to the external circumference of the rotor compresses the flexible tube so as to generate an occlusion of the tube.
  • the part of the tube under compression is pinched closed thus forcing the fluid to be pumped to move through the tube.
  • This process is used in many biological systems to pump clean or sterile fluids without exposing those fluids to contamination from exposed fluid components.
  • Peristaltic pumps are also used in a wide variety of industrial applications in order to pump abrasives and viscous fluids.
  • the peristaltic pump may generally include a pump body comprising a rotor driven by a motorized drive shaft and a cassette removably attached thereto, and a tube supported by the cassette.
  • a pump body comprising a rotor driven by a motorized drive shaft and a cassette removably attached thereto, and a tube supported by the cassette.
  • a main drawback of these systems is the time needed and the difficulty to easily and safely mount a pump.
  • the present invention relates to a removable peristaltic pump cassette comprising a stator configured to receive a tube intended to extend from an inlet to an outlet of said stator; the cassette further comprising a rotor located in said stator; said rotor comprising a driven shaft configured to cooperate with a drive shaft; said rotor comprises at least one roller configured to move in rotation to compress a portion of said tube to displace a fluid in said tube from the inlet to the outlet.
  • the peristaltic pump cassette comprises a cover ensuring the closing of the stator, said cover comprising an aperture to reach the driven shaft of the rotor.
  • Another advantage of the invention is that, when the cover is closed, the rotor, the roller and the tube are not available for the user, avoiding the risk of injuries.
  • Still another advantage of the invention is to allow the user to open the aperture located on the cover and to insert a crank in the driven shaft to provide energy rotating the rotor without electricity.
  • the cassette is disposable.
  • the stator and / or the rotor are made of plastic material.
  • said cassette further comprising a pattern to be identified by a reader.
  • the pattern allows the cassette to be advantageously identified.
  • a configured calculator may determine the rotation speed of the rotor. This configuration allows reaching a targeted flow rate of the fluid comprised in the tube. In another example, a configured calculator may determine the flow rate. This configuration allows reaching a targeted rotation speed of the rotor.
  • the stator comprises a frame wall positioned to compress the tube against the at least one roller. In one embodiment, the frame wall comprising a curves portion in order to guide the tube circularly around the axis of the driven shaft of the rotor.
  • the rotor comprising at least one support arm comprising the at least one roller, wherein said roller is maintained with at least one degree-of-freedom in rotation.
  • the inlet and / or the outlet comprise a maintaining groove of a joint comprising a protrusion on its circumference to cooperate with said groove. The joint allows connected safely an external tube 33 to the tube in the cassette.
  • the inlet and / or the outlet comprise a mobile part forming a flap to maintain the tube.
  • the rotor comprises a guiding means to guide and maintain said tube in the stator.
  • the guiding means is a part of the at least one support arm.
  • the invention further relates to a peristaltic pump head comprising a removable peristaltic pump cassette according to the invention, said head being also equipped with a centrifugation device comprising:
  • a base surface in contact with the cassette cover, said base surface comprising an aperture positioned facing the aperture of the cassette cover, a driven shaft aligned along the axis of the aperture of the base surface, and intended to cooperate with a drive shaft so as to rotate at least part of the centrifugation device,
  • said head further comprising attachment means configured to hold the centrifugation device in a stable position on the cassette cover.
  • the cassette and the centrifugation device are in fluid communication, so that a liquid intended to be pumped into the cassette is then conveyed to the centrifugation device.
  • the centrifugation device comprises an outer shell:
  • the peristaltic pump head comprises prehension means configured to simultaneously handle and move the cassette and the centrifuge device.
  • the prehension means comprise a handle cooperating with at least the centrifugation device.
  • the invention relates to a support comprising a pump housing intended to house a peristaltic pump head according to the invention, said support comprising a floating head comprising drive means configured to cooperate with the driven shafts of said peristaltic pump head.
  • said drive means comprise two drive shafts, a first drive shaft and a second drive shaft respectively intended to cooperate with the driven shafts of the cassette and of the centrifugation device of the peristaltic pump head, the second drive shaft being positioned inside the first drive shaft in a substantially concentric manner so that their respective rotational movements are independent, the drive means comprising two motors configured to respectively drive the first and second drive shafts.
  • the invention further relates to a support for a removable peristaltic pump cassette comprising a floating head comprising a drive shaft and a motor to drive said drive shaft; said support comprising a pump housing configured to house a removable peristaltic pump cassette, said cassette comprising a rotor located in a stator and comprising a driven shaft configured to cooperate with the drive shaft of the floating head; said support comprising at least one retractable element for cooperate the floating head with the driven shaft of the cassette.
  • the at least one retractable element is the drive shaft of the floating head, said drive shaft being movable from a first retracted position to a second insertion position wherein the drive shaft of the floating head is inserted into said pump housing.
  • the at least one retractable element is the pump housing, said pump housing being movable from a first retracted position to a second position wherein the drive shaft of the floating head is inserted into said pump housing.
  • the present invention relates to a peristaltic pump comprising a support according to the present invention and a removable peristaltic pump cassette according to the present invention, and a tube.
  • the present invention also relates to a peristaltic pump comprising a tube, a support according to the invention, and a peristaltic pump head according to the invention.
  • the support of the peristaltic pump comprises a pattern reader configured to read a pattern located on the cassette.
  • the tube of the peristaltic pump is made of silicone.
  • “Cassette” refers to a removable closable receptacle.
  • “Stator”, refers to the stationary part of a rotary system.
  • Rotor refers to the moving component of a rotary system.
  • Floating head refers to a head protruding from a surface, preferably from a surface of a support.
  • Figure 1 is an exploded view of a cassette according to one embodiment of the present invention.
  • Figure 2 is an exploded view of the inlet and the outlet of the cassette according to one embodiment of the present invention.
  • Figure 3 is a schematic view of the support for a cassette according to one embodiment where the retractable element is the pump housing.
  • Figure 4 is a schematic view of the floating head according to one embodiment of the present invention.
  • Figure 5 is a schematic view of the floating head cooperating with the driven shaft of a cassette according to one embodiment of the present invention.
  • Figure 6 is an exploded view of the rotor according to tone embodiment of the present invention.
  • Figures 7 A and 7B are schematic view of the pump with transparent frame of the support wherein the at least one retractable element is the floating head.
  • FIGS 8A, 8B and 8C are schematic view of the pump wherein the at least one retractable element is the pump housing.
  • Figure 9A is an exploded view of the cassette comprising needle roller bearing and thrust needle roller bearing.
  • Figure 9B is an exploded view of the rotor comprising needle roller bearing and thrust needle roller bearing.
  • Figure 10A and 10B is a schematic front view of an alternative embodiment of figures 7A and 7B, in which a peristaltic pump head is respectively disengaged and engaged with the floating head of a support, said head comprising a cassette according to the invention and a centrifugation device.
  • Figure 10C is a three-quarter view of a particularly advantageous embodiment of the peristaltic pump head illustrated in Fig. 10A and 10B, in which said head comprises prehension means
  • the present invention relates to a removable peristaltic pump cassette 1, a support 18 comprising a motor to receive said cassette 1, and a peristaltic pump comprising the cassette 1 and the support 18.
  • the present invention relates to a removable peristaltic pump cassette 1 comprising a stator 2 and a rotor 6.
  • the rotor 6 comprises at least one roller 8 arranged at the external circumference of said rotor 6 in order to compress a flexible tube 3.
  • said tube 3 is made of silicone.
  • the choice of such a material is particularly advantageous because it allows the tube 3 to easily return to its original shape after being compressed by the rotor 3. In this way, it is prevented that the tube bears traces as it is used, and thus damages itself.
  • the choice of a particular material can typically result from a compromise between cost and lifespan.
  • stator 2 is a cassette housing.
  • the removable peristaltic pump cassette is disposable. Particularly in cardiopulmonary bypass application, elements which touch the blood cannot be reutilized.
  • all parts of the cassette 1 are intended for single-use only. Then, the cassette 1 and its components are intended to be threw out after use.
  • stator 2 and / or the rotor 6 are made in plastic material.
  • the stator 2 defines a compartment of the cassette 1 comprising different components of the cassette 1.
  • Said cassette 1 is configured to be inserted into a pump housing 19 of a support 18 comprising at least a floating head 17, said cassette 1 being intended to cooperate with said floating head 17.
  • the cassette 1 comprises a closed housing.
  • Said cassette 1 comprises a stator 2 on which the tube 3 is guided from an inlet 4 to an outlet 5 of the cassette 1.
  • the tube 3 is guided along a frame wall 21. Therefore, said tube 3 is made of a material which is deformable. The tube 3 is compressed between the at least one roller 8 and the frame wall 21 of the housing of the stator 2 of the cassette 1.
  • the rotor 6 comprises a driven shaft 7 configured to cooperate with a drive shaft 22.
  • the driven shaft 7 cooperates with the drive shaft 22, the rotation of the drive shaft 22 causes the rotation of the driven shaft 7.
  • the removable peristaltic pump cassette 1 is able to be coupled to a drive shaft 22 of a floating head 17 of the support 18.
  • the tube 3 of the cassette 1 is intended to be connected to external tubes 33 at the inlet 4 and the outlet 5.
  • the removable peristaltic pump cassette 1 is designed to be inserted in a pump housing 19 of a support 18, for example a drawer.
  • One advantage of the invention is to allow a user to remove easily the cassette 1 from the support 18, and choose a new cassette. Each cassette may be addressed for a specific application or a specific need. The user is able to insert a new cassette in the pump housing 19 of the support. No steps of handling tubes, especially the tube 3 of the housing of the cassette 1, rollers, or a rotor is then needed. This simplification avoids any risk of injury or any risk of incorrect setting or adjustment during the assembly which could disturb the pump to operate.
  • Fig. 1 describes a removable peristaltic pump cassette 1 comprising a rotor 6 and a stator 2.
  • the stator 2 comprises a frame wall 21 which ensures guiding a tube 3.
  • the removable peristaltic pump cassette 1 further comprise a pattern 30.
  • two rollers 8 are connected to a support arm 9 by a longitudinal element 81 configured to maintain a roller 8.
  • the support arm 9 comprises a lower arm 91 and an upper arm 90 arranged in opposite each other.
  • the lower arm 91 and the upper arm 90 comprise each one at least one aperture 92 arranged respectively one above the other.
  • two apertures 92 are facing each other so that the longitudinal element 81 may be introduced in each of the apertures.
  • a stopper 82 allows longitudinal element 81 to stay in position in said two apertures 92.
  • Each roller may comprise a hollow cylindrical profile in order to receive the longitudinal element 81 inside the hollow.
  • One advantage is to configure a slightly smaller diameter of the longitudinal element 81 than the diameter of the hollow of the roller 8. In this case the roller 8 may turn on itself and thus facilitate its contact with the tube 3, especially when the tube is introduced in the cassette 1.
  • the roller diameter is predefined, depending on the tube diameter, to produce an optimal occlusion of said tube 3.
  • the support arm 9 comprises the at least one roller 8 and maintains the at least one roller 8 with at least one degree-of-freedom, preferably in rotation.
  • the advantage is the at least one roller 8 is able to compress a portion of the tube without friction between the roller 8 and the tube 3.
  • the rotor 6 further comprises a driven shaft 7 configured to cooperate with a drive shaft 22 of a support 18.
  • the driven shaft 7 comprises a hollow center. In one embodiment, the driven shaft 7 comprises tooth configured to cooperate with tooth 23 of a drive shaft 22. In an alternative embodiment non-illustrated, the driven shaft 7 is configured to be inserted into a hollow center of a drive shaft 22 of a support. In on embodiment, the driven shaft 7 protruding from the stator 2.
  • the cassette 1 comprises a tube 3 extending from an inlet 4 to an outlet 5. In one embodiment, the inlet 4 and / or the outlet 5 comprise a joint 10 configured to connect the tube 3 of the cassette 1 to another tube outside the cassette.
  • the joint 10 comprises a hollow cylinder with an outside diameter substantially equal to the inner diameter of the tube 3 in order to insert said joint inside the tube 3.
  • the joint 10 comprises a hollow cylinder with an inner diameter substantially equal to the outer diameter of the tube 3 in order to insert the tube 3 inside the hollow cylinder of the joint 10.
  • the joint further comprise a protrusion 12. The advantage of this protrusion 12 is double: firstly, it acts like an abutment for the tube 3 when the joint 10 is inserted into the tube 3 and secondly it is configured to cooperate with a groove 11 of the inlet 4 or the outlet 5 to maintain the tube 3 in said inlet 4 or in said outlet 5.
  • the inlet 4 and / or the outlet 5 further comprise a maintaining groove 11 to cooperate with the protrusion 12 of the joint 10.
  • the joint 10 further comprise a second hollow cylinder extending from the cassette 1 in order to connect another external tube 33 to the inlet 4 and / or the outlet 5.
  • the inlet 4 and / or the outlet 5 further comprises a mobile part 13 forming a flap to maintain the tube 3 or to maintain the joint 10 in the inlet 4 or in the outlet 5.
  • the tube 3 protrudes from the exterior of the stator 2.
  • the tube 3 stick out from the inlet 4 and / or the outlet 5.
  • the inlet and / or the outlet comprise a plastic ring arranged at the circumference of the inlet and / or the outlet. Said plastic ring allows maintaining the tube in a predefined position.
  • the rotor 6 further comprises guiding means configured to rotate with the roller 8 and maintaining the tube in the working position before and / or after the passage of the roller 8.
  • the support arm 9 comprises said guiding means.
  • the guiding means extending radially from the driven shaft 7 of the rotor 6.
  • said guiding means maintain the tube 3 in the stator 2.
  • said guiding means is a part of the at least one support arm 9.
  • said guiding means is the lower arm 91 and / or the upper arm 90 of the support arm 9.
  • the cassette 1 comprises a cover 14 ensuring the closing of the stator 2.
  • said cover 14 comprises an aperture 15 to reach driven shaft 7 of the rotor 6.
  • said aperture 15 allows reaching the hollow center of the driven shaft 7 or to reach the tooth of the driven shaft 7. The advantage is to provide a security in case of a shut-down of the electrical system.
  • the user in case of power failure or in case of power interruption, the user is able to open the aperture and to insert a crank in the driven shaft to provide energy rotating the rotor without electricity.
  • the cover 14 is transparent. In one embodiment, the cover 14 is made of plastic material. In one embodiment, the cover 14 is made of polycarbonate, polystyrene, or acrylonitrile butadiene styrene (also called ABS).
  • the cassette 2 comprises a frame wall 21 positioned to guide the tube 3.
  • the at least one roller 8 is configured to press the tube against the frame wall 21.
  • said frame wall 21 comprises a curve portion in order to guide the tube 3 circularly around the axis of the driven shaft 7 of the rotor 6.
  • the portion of the frame wall 21 compressing the tube 3 against the roller 8 is straight.
  • said frame wall 21 is comprised in the stator 2.
  • the cassette 1 further comprises a pattern 30. In one embodiment, the cassette 1 comprises a pattern 30 on its external surface. In one embodiment, said pattern 30 allows associating the cassette 1 with a tube diameter.
  • An information of the context of use is read on the pattern by an electronical or optical reader.
  • the information is automatically read by the reader. It allows a user, such as medical staff, to understand the context of the configuration of the pump needed.
  • An interface may be integrated in the pump or in another equipment in order to read the information decoded by the reader.
  • the user who configures the pump may control the pressure, the flow rate or the speed rotation of the rotor according to a predefined setting.
  • said user can adjust the speed rotation to reach a predefined speed flow. In one embodiment, said user can adjust the speed rotation to reach an optimal flow. In one embodiment, the interface comprises a button or a potentiometer to modify the speed rotation.
  • the pattern 30 is a machine-readable label that contains information about the cassette 1 to which it is attached. In one embodiment, said information comprise the outside diameter of the tube 3 of the cassette. In one embodiment, said information comprise the inside diameter of the tube 3 of the cassette 1.
  • said information comprise the pressure exerted by the roller 8 on the tube 3. In one embodiment, said information comprise the gap between the roller 8 and the frame wall 21 determining the squeeze applied on the tube 3.
  • said information allow calculating the flow rate of the peristaltic pump. In one embodiment, said information allow calculating the flow rate of the peristaltic pump depending of the rotation speed of the rotor 6 or depending of the number of revolution per minute of the rotor 6. In one embodiment, said information allow calculating the flow rate depending of the rotation speed chosen by the user via the interface.
  • said information comprise the number of rollers 8. In one embodiment, said information comprise the length of the tube 3 measured from the inlet 4 to the outlet 5.
  • said pattern 30 is an optical label.
  • the optical label is characterized by its size, its shape or its color.
  • the optical label is a barcode.
  • the optical label is a quick response code (commonly called QR code).
  • the visual label is a matrix barcode.
  • said pattern 30 is a three-dimensional or a mechanical pattern.
  • said pattern 30 is a geometric shape or a size.
  • said pattern 30 is a pin which can be inserted in a specific housing. In one embodiment, said pattern 30 is the location of a pin in the exterior surface of the cassette.
  • the pattern 30 allows the cassette to be advantageously identified. Then, a calculator determines the flow applied to the fluid based on the rotation speed of the pump.
  • the rotation speed of the rotor may be determined by the user to reach the optimal flow.
  • This configuration allows reaching a targeted flow rate of the fluid comprised in the tube 3.
  • a configured calculator may determine the flow rate. This configuration allows reaching a targeted rotation speed of the rotor 6.
  • the present invention also relates to a support for a cassette.
  • said support 18 comprises a floating head 17.
  • the support 18 further comprises a pump housing 19 configured and dimensioned to receive or to house a removable peristaltic pump cassette 1 to cooperate with the drive shaft 22 of the floating head 17.
  • the floating head 17 comprises a drive shaft 22 and a motor 16 connected to said drive shaft 22.
  • At least a part of the floating head 17 is protruding in the pump housing 19. In one embodiment, at least a part of the drive shaft 22 is protruding in the pump housing 19.
  • the drive shaft 22 of the floating head 17 is configured to cooperate with a driven shaft of a cassette.
  • the drive shaft 22 is coupled to a motor 16.
  • the motor 16 of the support 18 transmits rotating movement to the drive shaft 22 of the floating head 17.
  • the support 18 comprises a frame 31 and the floating head 17.
  • at least a part of the floating head 17 is protruding from the frame 31 of the support 18.
  • the drive shaft 22 is on a distal part of the floating head 17. By distal, it should be understood here spaced from the attachment point with the frame 31 of the support 18.
  • the pump housing 19 is located on the top surface of the support 18. In said embodiment, the pump housing 19 is accessible to the cassette 1 so that the cassette 1 can be mounted on the floating head 17 by a translation displacement in the direction of the rotation axis of the drive shaft 22 of the floating head 17.
  • said support 18 comprises at least one retractable element for cooperate the floating head 17 with the driven shaft 7 of the cassette 1.
  • retractable element is to provide a peristaltic pump wherein the cassette 1 is at least in part surrounded by walls of the pump housing 19.
  • the cassette 1 When the cassette 1 is at least in part surrounded by walls, the cassette is advantageously maintained by said walls and the stress on the floating head 17 during use is reduced.
  • the reduction of the stress in the floating head 17 improves the durability of the floating head 17 and the durability of the support 18.
  • the at least one retractable element is the drive shaft 22 of the floating head 17.
  • the drive shaft 22 is movable from a first retracted position to a second insertion position wherein the drive shaft 22 of the floating head 17 is inserted into said pump housing 19.
  • the floating head 17 comprises at least one element ensuring the translation of the drive shaft 22 among but not limited to a spring or a protrusion in a groove.
  • the cassette 1 is designed to be inserted into the pump housing 19 (e.g. by translation) when the drive shaft 22 of the floating head 17 is in the first retracted position (Fig. 7A).
  • the driven shaft 7 of the cassette is configured to be positioned in front of the drive shaft 22.
  • the drive shaft 22 is moved from the first retracted position to the second insertion position wherein the drive shaft 22 of the floating head 17 cooperates with the driven shaft 7 of the cassette 1 (Fig. 7B).
  • the at least one retractable element is the pump housing 19, said pump housing 19 being movable from a first retracted position (Fig. 8A and 8B) to a second position wherein the drive shaft 22 of the floating head 17 is inserted into said pump housing 19 (Fig. 8C).
  • the support 18 comprises means to ensure a displacement of the pump housing 19 from a first retracted position to a second position.
  • the support 18 comprises at least one groove and the pump housing 19 comprises at least one protruding element configured to be movable along said groove of the support 18 (or inversely). This groove and this protruding element ensures the displacement of the pump housing 19 in regard with the support 18.
  • the support comprising a slider in which the pump housing 19 is able to slide.
  • said removable peristaltic pump cassette is the removable peristaltic pump cassette according to the first aspect of the present invention.
  • the pump house of the support 18 further comprises a reader 32 able to read the pattern of the cassette 2 described above.
  • the support 18 comprises a software and / or a database determining the flow rate of the liquid in the tube 3.
  • the support comprises 18 a software and / or a database determining the rotation speed of the rotor.
  • this determination is automatically engaged with the reading of the pattern of the cassette.
  • said pump housing is a receptacle, a compartment or a container.
  • the present invention further related to a peristaltic pump comprising a support according to the second aspect and a removable peristaltic pump cassette according to the first aspect of the present invention.
  • said peristaltic pump further comprises a tube 3.
  • the cassette 1 is configured to be inserted in the pump housing 19.
  • the drive shaft 22 is located on the pump house such as to cooperate with the driven shaft 7 of the cassette when said cassette is inserted in the pump housing 19.
  • Fig.5 illustrates one embodiment of a mechanical cooperation between the floating head 17 of the support 18 and the driven shaft 7 of the cassette 1.
  • the floating head 17 comprises a drive shaft 22, a motor shaft 24, and a spring 26.
  • said spring 26 is located between the drive shaft 22 and the motor shaft 24.
  • the spring 26 is configured, when being uncompressed, to separate the drive shaft 22 from the motor shaft 24. This separation allows facilitating the introduction of the floating head 17 into the driven shaft 7 of the cassette 1.
  • this configuration allows introducing a mechanical clearance by rotating the floating head 17 in order to guide the teeth of the drive driven shaft 7 into those 27 of the cassette 1.
  • the drive shaft 22 comprises teeth 23 cooperating with the teeth of the driven shaft 7 of the rotor 6.
  • the teeth 23 of the drive shaft 22 comprises a distal chamfer 27 on their distal end. The distal chamfer 27 advantageously slide on the teeth of the driven shaft 7 until the embedment of the teeth 23 of the drive shaft 22 in the driven shaft 7.
  • the motor shaft 24 comprises teeth 25.
  • the drive shaft 22 and the motor shaft 24 are configured to cooperate each other when the spring 26 between them is compressed.
  • the spring 26 is compressed and the teeth 23 of the drive shaft 22 cooperates with the teeth 25 of the motor shaft 24.
  • the proximal end of each tooth of the drive shaft 22 comprises a chamfer 28 improving the embedment of each tooth 23 of the drive shaft 22 between two successive teeth 24 of the motor shaft 25.
  • the teeth 25 of the motor shaft 24 also comprise chamfers 29 on their distal end improving the embedment of the teeth 23 of the drive shaft 22 in the spaces defined between two successive teeth 24 of the motor shaft 25.
  • the driven shaft 7 comprises an abutment or an abutment ring 20 configured to stop the displacement of the teeth 23 of the drive shaft 22 in the driven shaft 7.
  • the cassette further comprises means to reduce the friction between the driven shaft 7 and the stator 2.
  • the cassette 1 further comprises at least one thrust needle roller bearing 35 and / or at least one needle roller bearing 34.
  • said thrust needle roller bearing 35 is located between the driven shaft 7 and the cover 14 and / or between the driven shaft 7 and the part of the stator 2.
  • the at least one thrust needle roller bearing 35 and the at least one needle roller bearing 34 are concentric with the driven shaft 7.
  • the at least one thrust needle roller bearing 35 avoid the gap between the driven shaft 7 and the stator 2 or between the driven shaft 7 which limit a vertical displacement of the driven shaft 7.
  • the at least one thrust needle roller bearing 35 and the at least one needle roller 34 avoid the friction between the stator 2 and the driven shaft 7 or between the cover 14 and the driven shaft 7.
  • said at least one needle roller bearing 34 is arranged in a portion of the stator 2 having a cylinder shape. Then, the at least one needle roller bearing 34 ensures that the friction between the driven shaft 7 and the wall of said portion of the stator is reduced.
  • the at least one needle roller bearing 34 further limits the horizontal displacement of the driven shaft 7.
  • vertical it should be understood along the rotation axis of the driven shaft 7.
  • horizontal it should be understood along an axis perpendicular to the rotation axis of the driven shaft 7.
  • the invention relates to a peristaltic pump head 100.
  • a peristaltic pump head 100 is configured not only to pump a liquid, such as blood, but also to centrifuge the same liquid or a different one, and thus forms an alternative embodiment of the invention described above, the support for this head 100 and the associated peristaltic pump being modified accordingly and as described below.
  • FIGS. 10A and 10B schematically illustrate said alternative embodiment, in which the peristaltic pump head 100 is housed in a support configured for this purpose, said peristaltic pump head 100 comprising not only a cassette 1 with an aperture 15 according to the invention but also a centrifugation device 110.
  • Figures 10A and 10B show a front view of a floating head 170 of the support on which the peristaltic pump head 100 is disengaged and engaged respectively.
  • Figures 10A and 10B are schematic illustrations in that the only element of the support that is shown is the floating head 170. It will appear obvious to the skilled person in the art that the support of this alternative embodiment cannot be limited to the presence of this floating head 170 alone. Thus, all the characteristics of the support described above, for example those related to Fig. 7A, 7B, 8A, 8B and 8C, may form part of the support relative to said alternative embodiment.
  • the centrifugation device 110 of the peristaltic pump head comprises a base surface 111 in contact with the cassette cover 14, said base surface 111 comprising an aperture 112 positioned facing the aperture 15 of the cassette cover 14.
  • said base surface 111 is configured to conform to the surface of the cassette cover 14 and extends to the contours of said cover 14.
  • the cassette 1 forms a baseplate on which the centrifugation device 110 is supported.
  • the base surface 111 for its part, forms part of an outer shell 113 of the centrifuge device 110.
  • the part of the outer shell 113 that does not include the base surface 111 extends vertically from the base surface 111 by extending the lateral edges of the cassette 1.
  • the peristaltic pump head 100 has a uniform appearance, without roughness, and can therefore be easily inserted into a housing provided in the.
  • the outer shell 113 is designed so that the peristaltic pump head 100 is substantially kettle- shaped.
  • the base surface 111 as well as the shape of the peristaltic pump head 100, as long as the centrifuge device 110 is supported on the cassette 1, the objective remaining that the centrifuge device 110 and the cassette 1 are substantially aligned at their respective apertures 15, 112.
  • the centrifugation device 110 further comprises a driven shaft 114 aligned along the axis of the aperture 112 of the base surface 111, and intended to cooperate with a drive shaft so as to rotate at least part of the centrifugation device 110.
  • the driven shaft 114 of the centrifugation device 110 is arranged to extend in the axis of the floating head 170 of the support.
  • said driven shaft 114 does not pass through the aperture 112 of the base surface 111 and therefore remains within the volume delimited by the outer shell 113.
  • the outer shell 113 is configured to remain in a fixed position during operation of the centrifugation device 110.
  • fixed position one refers here to the fact that the outer shell 113 does not rotate when the centrifugation device 110 is in motion.
  • an inner bowl 115 is arranged within said outer shell 113 and is configured to cooperate with the driven shaft 114, so as to centrifuge a liquid intended to be conveyed within said inner bowl 115.
  • the inner bowl 115 is bell-shaped and thus corresponds to a surface of revolution whose axis of revolution is aligned with the driven shaft 114.
  • a drive disc 116 is positioned at the lower part of the inner bowl 115, so that it faces the respective apertures of the cassette cover 14 and of the base surface 111.
  • Said drive disc 116 is configured in a manner known per se to cooperate with the driven shaft 114 as well as with the inner bowl 115 to rotate the latter when the driven shaft 114 is in motion. It will also be obvious for the skilled person in the art that other elements configured to obtain a rotational movement, such as bearings, can be used in addition or not to the drive disc 116.
  • the centrifugation device 110 and the cassette 1 can be operated with the same liquid.
  • the cassette 1 and the centrifugation device 110 are in fluid communication, so that a liquid intended to be pumped into the cassette 1 is then conveyed to the centrifugation device 110, for example inside the inner bowl 115.
  • a liquid intended to be pumped into the cassette 1 is then conveyed to the centrifugation device 110, for example inside the inner bowl 115.
  • a hydraulic network for example formed by tubes
  • the liquid concerned is blood
  • transferring the pumped blood to the centrifuge device 110 allows the latter to be washed and the red blood cells to be concentrated following a rotation movement at high speed, typically between 3000 and 5000 rpm (revolutions per minute).
  • the blood can be evacuated to an external bag for storage.
  • the type of liquid that may circulate in the cassette 1 and/or in the centrifugation device 110 does not constitute a limitation of the invention.
  • any type of liquid can be considered, such as a physiological serum, a washing solution, etc.
  • the peristaltic pump head 100 comprises attachment means configured to hold the centrifugation device 110 in a stable position on the cassette cover 14.
  • the attachment means can be of any type, such as screwing, clamping, gluing, welding, clipping, etc. In this way, it is possible to move the peristaltic pump head 100 without the cassette 1 and centrifuge device 110 disengaging from each other.
  • the attachment means are reversible, so that the cassette 1 can be separated from the centrifuge device 110, for example when at least one of these elements 1, 110 is defective and it is desired to replace it.
  • the configuration of the present invention makes it advantageous to have an all-in-one system formed by the combination of the cassette 1 and the centrifuge device 110.
  • the configurations known until now separated the cassette from the centrifuge device which required a complex geometry of the arrangement of these elements in close proximity to each other, and therefore also numerous and potentially dangerous manipulations to connect them.
  • these risks are thus eliminated since the assembly of the cassette 1 with the centrifugation device 110 can be carried out upstream of the assembly of the peristaltic pump head 100 with the support.
  • the pre-assembled head 100 forms a ready- to-use unit, which can therefore be handled safely.
  • Figure 10C shows a three-quarter view of a particularly advantageous embodiment of the peristaltic pump head 100 illustrated in Fig. 10A and 10B, in which said head 100 comprises prehension means configured to simultaneously handle and move the cassette 1 and the centrifuge device 110. These prehension means make it easier to move the head 100.
  • a user can grasp said prehension means, preferably with one hand, in order to transfer the head 100 very easily from an initial position, for example outside a support of a peristaltic pump, to a final position, for example in a housing of this support.
  • the prehension means comprise a handle 117 cooperating with at least the centrifugation device 110.
  • said handle 117 substantially forms an arc of a circle extending in a vertical plane, and has two extremities respectively attached to the upper part (i.e. the part which is furthest from of the cassette 1) and the lower part (i.e. the part which is nearest to the cassette 1) of the centrifugation device 110.
  • the peristaltic pump head 100 is associated with a support configured to house and operate it, and corresponds to a variant of the support described in reference to Fig. 7A, 7B, 8A, 8B and 8C.
  • the support comprises a pump housing (not illustrated on Fig. 10A and 10B) intended to house the peristaltic pump head 100 according to the invention.
  • Said support also comprises a floating head 170 comprising drive means configured to cooperate with the driven shafts 7, 114 of said peristaltic pump head 100. In this way, the drive means allow not only the cassette rotor 6 but also the centrifugation device 110 to be rotated.
  • said drive means comprise two drive shafts, a first drive shaft 171 and a second drive 172 shaft respectively intended to cooperate with the driven shafts
  • the second drive shaft 172 is positioned inside the first drive shaft 171 in a substantially concentric manner so that their respective rotational movements are independent.
  • the drive shafts 171, 172 of the floating head 170 are substantially cylindrical in shape, the second drive shaft 172 being inserted coaxially into the first drive shaft 171 without touching the inner walls of the latter.
  • This second drive shaft 172 is positioned so as to pass through the aperture 15 of the cassette cover 14 and also the aperture 112 of the base surface 111 of the centrifugation device 110.
  • the second drive shaft 172 also has an extremity configured to cooperate with the drive disc 116 of the inner bowl 115, the transmission of the rotational movement being carried out upon the cooperation between the drive disc 116 and this extremity of the second drive shaft 172.
  • the drive means further comprise two motors (not illustrated in the figures) configured to respectively drive the first and second drive shafts 171, 172.
  • the motor associated with the first drive shaft 171 is configured so that the rotational speed of the cassette rotor 6 is between 1 and 100 rpm.
  • the motor associated with the second drive shaft 172 is for its part configured so that the speed of rotation of the inner bowl 115 is between 3000 and 5000 rpm. None excludes, following other examples not detailed here, having different speed ranges for these motors. In particular, these speed ranges are determined by the skilled person in the art according to the intended application, i.e., in particular, whether the liquid pumped into the cassette is intended to be centrifuged.
  • the invention also concerns, in another aspect, a peristaltic pump comprising a tube as well as such a head and support.
  • the support comprises a pattern reader configured to read a pattern located on the cassette.
  • 170 - bloating head configured to engage/disengage with the peristaltic pump head

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)

Abstract

La présente invention concerne une cassette de pompe péristaltique amovible comprenant un stator (2) conçu pour recevoir un tube (3) destiné à s'étendre depuis une entrée (4) jusqu'à une sortie (5) dudit stator (2) ; la cassette (1) comprend en outre un rotor (6) situé dans ledit stator (2) ; ledit rotor (6) comprend un arbre mené (7) conçu pour coopérer avec un arbre menant ; ledit rotor (6) comprend au moins un rouleau (8) conçu pour se déplacer en rotation de sorte à comprimer une partie dudit tube (3) afin de déplacer un fluide dans ledit tube (3) de l'entrée (4) jusqu'à la sortie (5). La cassette de pompe péristaltique amovible comprend en outre un couvercle (14) assurant la fermeture du stator (2), ledit couvercle (14) comprenant une ouverture (15) qui permet d'atteindre l'arbre mené (7) du rotor (6). La présente invention concerne également un support destiné à une cassette de pompe péristaltique amovible selon la présente invention.
PCT/EP2018/083219 2017-12-01 2018-11-30 Cassette de pompe péristaltique WO2019106185A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP17306682.0 2017-12-01
EP17306682 2017-12-01
US201862625474P 2018-02-02 2018-02-02
US62/625,474 2018-02-02

Publications (1)

Publication Number Publication Date
WO2019106185A1 true WO2019106185A1 (fr) 2019-06-06

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ID=64477194

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Application Number Title Priority Date Filing Date
PCT/EP2018/083219 WO2019106185A1 (fr) 2017-12-01 2018-11-30 Cassette de pompe péristaltique

Country Status (1)

Country Link
WO (1) WO2019106185A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112568859A (zh) * 2019-09-30 2021-03-30 富士胶片株式会社 内窥镜用送液装置、送液管及送液装置主体
CN117948265A (zh) * 2024-03-27 2024-04-30 保定思诺流体科技有限公司 一种新型蠕动泵

Citations (15)

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Publication number Priority date Publication date Assignee Title
US3877634A (en) * 1973-05-25 1975-04-15 Du Pont Cell washing centrifuge apparatus and system
US4558996A (en) * 1983-06-30 1985-12-17 Organon Teknika Corporation Easy load peristaltic pump
US5518378A (en) * 1992-04-30 1996-05-21 Debiotec S.A. Cassette-type peristaltique pump fitted with an undeceitful assembly
US5588815A (en) * 1995-11-15 1996-12-31 Alcon Laboratories, Inc. Surgical cassette loading and unloading system
EP0885619A1 (fr) * 1997-06-16 1998-12-23 Terumo Kabushiki Kaisha Appareil pour collecter des composants du sang
US20010020148A1 (en) * 2000-02-07 2001-09-06 Joachim Sasse Medical device
US20040124157A1 (en) * 2002-03-04 2004-07-01 Dennis Briggs Apparatus for the continuous separation of biological fluids into components and method of using same
US20090053085A1 (en) * 2007-08-24 2009-02-26 Thompson Loren M Peristalitic pump assembly and method for attaching a cassette thereto
WO2009042181A1 (fr) 2007-09-27 2009-04-02 Delphi Technologies, Inc. Pompe péristaltique et cassette amovible dédiée
US20100008755A1 (en) * 2008-07-14 2010-01-14 Blue-White Industries, Ltd. Method of extending tubing life of a peristaltic pump
EP2500569A1 (fr) * 2009-11-12 2012-09-19 Welco Co., Ltd Pompe à tube et stabilisateur à tube
US20130315763A1 (en) * 2012-05-24 2013-11-28 Cook Medical Technologies Llc Peristaltic pump tubing securing system
EP3017836A1 (fr) * 2014-11-04 2016-05-11 Micrel Medical Devices S.A. Pompe péristaltique rotative sans pulse
US20170184088A1 (en) * 2015-12-24 2017-06-29 Hologic, Inc. Uterine distension fluid management system with peristaltic pumps
WO2017129193A1 (fr) * 2016-01-25 2017-08-03 Fluisense Aps Pompe péristaltique à micro-dosage pour le micro-dosage d'un fluide

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877634A (en) * 1973-05-25 1975-04-15 Du Pont Cell washing centrifuge apparatus and system
US4558996A (en) * 1983-06-30 1985-12-17 Organon Teknika Corporation Easy load peristaltic pump
US5518378A (en) * 1992-04-30 1996-05-21 Debiotec S.A. Cassette-type peristaltique pump fitted with an undeceitful assembly
US5588815A (en) * 1995-11-15 1996-12-31 Alcon Laboratories, Inc. Surgical cassette loading and unloading system
EP0885619A1 (fr) * 1997-06-16 1998-12-23 Terumo Kabushiki Kaisha Appareil pour collecter des composants du sang
US20010020148A1 (en) * 2000-02-07 2001-09-06 Joachim Sasse Medical device
US20040124157A1 (en) * 2002-03-04 2004-07-01 Dennis Briggs Apparatus for the continuous separation of biological fluids into components and method of using same
US20090053085A1 (en) * 2007-08-24 2009-02-26 Thompson Loren M Peristalitic pump assembly and method for attaching a cassette thereto
WO2009042181A1 (fr) 2007-09-27 2009-04-02 Delphi Technologies, Inc. Pompe péristaltique et cassette amovible dédiée
US20100008755A1 (en) * 2008-07-14 2010-01-14 Blue-White Industries, Ltd. Method of extending tubing life of a peristaltic pump
EP2500569A1 (fr) * 2009-11-12 2012-09-19 Welco Co., Ltd Pompe à tube et stabilisateur à tube
US20130315763A1 (en) * 2012-05-24 2013-11-28 Cook Medical Technologies Llc Peristaltic pump tubing securing system
EP3017836A1 (fr) * 2014-11-04 2016-05-11 Micrel Medical Devices S.A. Pompe péristaltique rotative sans pulse
US20170184088A1 (en) * 2015-12-24 2017-06-29 Hologic, Inc. Uterine distension fluid management system with peristaltic pumps
WO2017129193A1 (fr) * 2016-01-25 2017-08-03 Fluisense Aps Pompe péristaltique à micro-dosage pour le micro-dosage d'un fluide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112568859A (zh) * 2019-09-30 2021-03-30 富士胶片株式会社 内窥镜用送液装置、送液管及送液装置主体
EP3797674A1 (fr) * 2019-09-30 2021-03-31 FUJIFILM Corporation Dispositif d'alimentation en liquide pour endoscope, tube d'alimentation en liquide et corps du dispositif d'alimentation en liquide
CN117948265A (zh) * 2024-03-27 2024-04-30 保定思诺流体科技有限公司 一种新型蠕动泵

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