US20220389923A1 - Peristaltic pump with one-piece pump body and facilitated assembly - Google Patents
Peristaltic pump with one-piece pump body and facilitated assembly Download PDFInfo
- Publication number
- US20220389923A1 US20220389923A1 US17/775,194 US202017775194A US2022389923A1 US 20220389923 A1 US20220389923 A1 US 20220389923A1 US 202017775194 A US202017775194 A US 202017775194A US 2022389923 A1 US2022389923 A1 US 2022389923A1
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- Prior art keywords
- peristaltic pump
- housing
- flexible tube
- rotor
- pump according
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 230000002572 peristaltic effect Effects 0.000 title claims abstract description 50
- 239000012530 fluid Substances 0.000 claims description 21
- 230000000295 complement effect Effects 0.000 claims description 18
- 239000012263 liquid product Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Images
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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- the invention relates to a peristaltic pump to transfer a product, generally liquid, and a method for assembling such a peristaltic pump.
- the invention also relates to a device for dispensing a liquid product comprising such a pump.
- the invention aims in particular to provide a peristaltic pump whose assembly is facilitated, preferably can be industrialised and in particular automated.
- This invention therefore relates to a peristaltic pump comprising:
- the invention provides for a single part designed to support the rotor and to receive the flexible tube, which means that there is no need to provide for two separate parts to sandwich the flexible tube. Fewer parts therefore need to be assembled and there are fewer assembly steps. Since the pump is easier to assemble, the assembly can be industrialised and in particular automated. The manufacturing cost is therefore reduced. It is understood that two parts formed as one-piece are parts forming a single piece, preferably integral with each other, or even integrally moulded, in other words the head for receiving the flexible tube and the body for supporting the rotational shaft of the rotor are included in the same one-piece part.
- the housing comprises:
- the deformable means can also be used to enlarge the assembly opening or reduce the width of a part of the rotor, for example of the rotational shaft.
- enlarging the assembly opening allows the rotational shaft of the rotor to go through the opening up to the assembled position. An assembly such as clipping or a force fit is thus possible. No tools or additional steps are required.
- the ramp guides the rotational shaft as it moves and facilitates the deformation of the assembly opening.
- the deformable means comprise two ramps intended to cooperate with the two ends of the rotational shaft to facilitate the deformation of the assembly opening.
- a recess is a through-hole.
- the shape of the recess follows the ramp to make it even easier to deform the assembly opening.
- a lateral support is a support which prevents the displacement of the tube along the axis of rotation of the rotor.
- This invention also relates to a method for assembling a peristaltic pump as described previously, comprising the following steps:
- the assembly method also comprises the following steps:
- the invention further relates to a liquid product dispensing device, comprising:
- FIG. 1 is a cross-sectional view of a peristaltic pump according to a first embodiment of the invention
- FIG. 2 is an exploded perspective view of the peristaltic pump of FIG. 1 ;
- FIG. 3 is a cross-sectional and perspective view of a housing of the peristaltic pump of FIG. 1 ;
- FIG. 4 is an exploded perspective view of a peristaltic pump according to a second embodiment of the invention.
- FIG. 5 is a perspective view of the assembled peristaltic pump of FIG. 4 ;
- FIG. 6 is an exploded perspective view of a peristaltic pump according to a third embodiment of the invention.
- FIG. 7 is a perspective view of the assembled peristaltic pump of FIG. 6 .
- FIGS. 1 to 3 show a peristaltic pump according to a first embodiment of the invention, designated by the general reference 1 .
- the peristaltic pump 1 comprises a one-piece housing 10 as shown on FIG. 2 .
- the housing 10 comprises an upper part, forming a head 18 for receiving the flexible tube 30 , having the general shape of a half-cylinder, and a lower part forming a support body 19 .
- the lower part forming a support body 19 consists of two opposite vertical walls 191 , arranged in the extension of the cylindrical surface of the upper part forming a receiving head 18 , and of two opposite lateral walls 192 , which are substantially in the same plane as the flat surfaces of the upper part forming a receiving head 18 .
- the peristaltic pump 1 is configured to receive a flexible tube 30 which is shown on FIGS. 1 and 2 .
- the flexible tube 30 has a fluid inlet 31 and a fluid outlet 32 .
- the fluid inlet 31 is intended to be connected to a liquid product reservoir and the fluid outlet 32 is intended to be connected to a liquid product dispensing unit.
- the peristaltic pump 1 transfers liquid product from the reservoir to the dispensing unit.
- the product dispensed is a medication and dispensing is carried out by injection using a catheter.
- the upper part forms a head 18 for receiving the flexible tube 30 and comprises a cavity 181 configured to receive the flexible tube 30 .
- FIG. 3 is a cross-sectional and perspective view of a first half-part of the housing 10 according to a first plane of symmetry P 1 of the housing 10 . Consequently, it is understood that the cavity 181 has a U-shaped profile according to the first plane of symmetry P 1 of the housing 10 .
- the receiving head 18 further comprises a stop 14 as shown on FIG. 3 , supporting the flexible tube 30 laterally. It is understood that this stop 14 is also present on the other half-part of the housing 10 (not shown on this figure).
- the peristaltic pump 1 further comprises a rotor 20 comprising a rotational shaft 25 shown on FIG. 2 .
- the rotor 20 is configured to be rotationally driven so as to deform a part of the flexible tube 30 located in the upper part forming a receiving head 18 of the housing 10 .
- the upper part forms a head 18 of the housing 10 for receiving the flexible tube 30 .
- the rotor 20 comprises three rollers 23 mounted respectively on a rod 24 so that each associated roller can rotate freely.
- the rotor 20 further comprises a first plate 21 and a second plate 22 mounted on each side of the rollers 23 . At least the first plate 21 comprises a hollow 27 at its center intended to cooperate with a drive means 40 , as shown on FIG. 2 , actuated by an electric motor.
- the drive means 40 can be a cylinder provided with a protuberance 41 having a shape complementary to that of the hollow 27 .
- the protuberance 41 on the drive means 40 couples with the hollow 27 of the first plate 21 so that the drive means 40 can rotate the first plate 21 and the entire rotor 20 .
- the first plate 21 and the second plate 22 further comprise holes 26 to receive one end of each rod 24 so that when the rotor 20 is rotated, the first plate 21 and the second plate 22 drive the rods 24 which in turn drive the rollers 23 so that they rotate around the rotational shaft 25 .
- Each roller 23 is arranged so as to compress a portion of the flexible tube 30 facing it against the receiving head 18 when the peristaltic pump 1 is assembled.
- the rollers 23 which block portions of the flexible tube 30 as they rotate will move the liquid product contained in the tube in the same direction.
- the liquid product at the inlet of the peristaltic pump 1 can then be sucked in due to the elasticity of the flexible tube 30 .
- This is the traditional operation of a peristaltic pump known in the technical field and which will therefore not be described in detail here.
- the lower part forms a body 19 of the housing 10 for supporting the rotational shaft 25 of the rotor 20 , the rotational shaft 25 being mounted to rotate freely relative to the support body 19 .
- the housing 10 comprises two orifices 11 for receiving the rotational shaft 25 , the orifices 11 being arranged on the two lateral walls 192 of the housing 10 to form bearings.
- the rotor 20 comprises respectively on the first plate 21 and the second plate 22 a disc 211 extending from the first plate 21 or the second plate 22 of diameter substantially equal to that of the orifices 11 , each disc 211 cooperating with a corresponding orifice 11 to support the rotor 20 in the support body 19 .
- the disc 211 forms the rotational shaft 25 .
- the housing 10 comprises an assembly opening 12 arranged at the end of the support body 19 which is arranged on the side opposite the receiving head 18 .
- the rotor 20 is assembled in the housing 10 through this assembly opening 12 .
- the housing 10 further comprises deformable means 13 , 13 ′ used to deform the assembly opening 12 when assembling the rotor 20 .
- the deformable means 13 , 13 ′ comprise ramps 13 carried by the housing 10 , in particular at the support body 19 .
- each ramp 13 is arranged on a vertical wall 191 as shown on FIGS. 2 and 3 .
- the ramps 13 come into contact with the rotational shaft 25 of the rotor 20 .
- the rotational shaft 25 exerts a pressure on the ramps 13 , and on the lateral walls 192 , tending to push them apart, thus deforming the assembly opening 12 to facilitate the assembly of the rotor 20 .
- the ramp 13 extends between the assembly opening 12 and the orifice 11 .
- each lateral wall 192 comprises two longitudinal recesses 13 ′ arranged on each side of the orifice 11 and of the ramp 13 .
- the housing 10 comprises means 15 for attaching the fluid inlet 31 and the fluid outlet 32 of the flexible tube 30 .
- the attachment means 15 are receiving slots 15 having a first semi-circular area 151 connected to a second longitudinal area 152 .
- Each receiving slot 15 is arranged on a vertical wall 191 at the assembly opening 12 .
- the flexible tube 30 comprises complementary attachment means 33 comprising, in this first embodiment, a first cylindrical portion 331 of diameter slightly greater than the width of the second area 152 of the receiving slot 15 for a tight assembly.
- the complementary attachment means 33 further comprise a second portion 332 having the shape of a disc and connected to the first portion 331 .
- the diameter of the disc formed by the second portion 332 is greater than that of the first area 151 of the receiving slot 15 .
- Each of the first and second portions 331 , 332 is connected to the flexible tube 30 and forms one piece with it. In this example, they are integrally molded with the flexible tube 30 .
- the complementary attachment means 33 are arranged at two positions of the flexible tube 30 to cooperate with all the receiving slots 15 present on the housing 10 .
- the flexible tube 30 is first assembled on the rotor 20 or in the receiving head 18 of the housing 10 .
- the rotor is then assembled in the housing 10 and the rotational shaft 25 of the rotor 20 is connected to the drive means 40 , taking care to insert the first portion 331 of the complementary attachment means 33 into the receiving slot 15 .
- FIGS. 4 and 5 A second embodiment is shown on FIGS. 4 and 5 and only the differences compared with the first embodiment of the invention are described as follows:
- the complementary attachment means 34 comprise two rings 34 arranged at two positions of the flexible tube 30 , the rings 34 and the flexible tube 30 being formed as one piece.
- the attachment means 16 comprise two cavities 16 of shape substantially complementary to that of the ring 34 .
- FIGS. 6 and 7 A third embodiment is shown on FIGS. 6 and 7 and only the differences compared with the first embodiment of the invention are described as follows:
- the peristaltic pump 1 comprises two connectors 50 having a tubular body which are added and connected respectively to the fluid inlet 31 and to the fluid outlet 32 .
- the connectors 50 thus connect the flexible tube 30 to a liquid product reservoir and to a liquid product dispensing unit.
- Each connector 50 comprises complementary attachment means 35 between the two ends of the connector 50 and extending therefrom.
- the attachment means 17 comprise two cavities 17 of shape substantially complementary to a part, for example half of the complementary attachment means 35 .
- the invention is not limited to the embodiments described and other embodiments will be clearly apparent to those skilled in the art.
- the rotational shaft 25 can be retractable and retracted when assembling the peristaltic pump in order to insert the rotor 20 into the assembly opening 12 .
Abstract
A peristaltic pump includes a rotor including a rotational shaft and configured to be rotated so as to deform a flexible tube, a housing including a head for receiving the flexible tube and a body for supporting the rotational shaft of the rotor, the rotational shaft being mounted to rotate freely relative to the support body, the receiving head and the support body for the housing being formed as one piece.
Description
- The invention relates to a peristaltic pump to transfer a product, generally liquid, and a method for assembling such a peristaltic pump. The invention also relates to a device for dispensing a liquid product comprising such a pump.
- The state of the art, in particular document U.S. Pat. No. 5,082,429, already describes a peristaltic pump composed of two parts, one independent of the other, firstly a base carrying a rotor, secondly a head, added on top of the rotor in order to sandwich a dispensing pump between the two parts. The pump comprises a clamping arm used to close the space formed by the two parts and place the rotor in contact with the tube when it is mounted in the pump. The pump is assembled manually. Being sandwiched between the two parts, the dispensing tube can be replaced. The disadvantage of this peristaltic pump is that it is relatively difficult to assemble. Like all peristaltic pumps known in the state of the art, the peristaltic pump as described in this document must be assembled manually, resulting in a long assembly time and a high production cost.
- The invention aims in particular to provide a peristaltic pump whose assembly is facilitated, preferably can be industrialised and in particular automated.
- This invention therefore relates to a peristaltic pump comprising:
-
- a rotor comprising a rotational shaft and configured to be rotated so as to deform a flexible tube,
- a housing comprising a head for receiving the flexible tube and a body for supporting the rotational shaft of the rotor, the rotational shaft being mounted to rotate freely relative to the support body, the receiving head and the support body for the housing being formed as one piece.
- Thus, the invention provides for a single part designed to support the rotor and to receive the flexible tube, which means that there is no need to provide for two separate parts to sandwich the flexible tube. Fewer parts therefore need to be assembled and there are fewer assembly steps. Since the pump is easier to assemble, the assembly can be industrialised and in particular automated. The manufacturing cost is therefore reduced. It is understood that two parts formed as one-piece are parts forming a single piece, preferably integral with each other, or even integrally moulded, in other words the head for receiving the flexible tube and the body for supporting the rotational shaft of the rotor are included in the same one-piece part.
- According to other optional characteristics of the peristaltic pump taken alone or in combination:
- The housing comprises:
-
- an assembly opening through which the rotor is assembled in the housing and,
- deformable means used to deform the assembly opening and/or a part of the rotor when assembling the rotor.
- The deformable means can also be used to enlarge the assembly opening or reduce the width of a part of the rotor, for example of the rotational shaft. In the first case, enlarging the assembly opening allows the rotational shaft of the rotor to go through the opening up to the assembled position. An assembly such as clipping or a force fit is thus possible. No tools or additional steps are required.
-
- The deformable means comprise a ramp carried by the housing and configured to cooperate with the rotational shaft of the rotor to deform the assembly opening.
- The ramp guides the rotational shaft as it moves and facilitates the deformation of the assembly opening. Advantageously, the deformable means comprise two ramps intended to cooperate with the two ends of the rotational shaft to facilitate the deformation of the assembly opening.
-
- The deformable means comprise a recess used to deform the assembly opening. The recess makes a part of the housing arranged near the recess deformable, thus making it easier to deform the housing. More precisely, the presence of the recess makes it easier to deform the part forming the support body. Assembly of the rotor is therefore facilitated.
- It is understood that a recess is a through-hole. Preferably, the shape of the recess follows the ramp to make it even easier to deform the assembly opening.
-
- The receiving head comprises a cavity configured to receive the flexible tube and a stop to support the flexible tube laterally. Thus, the flexible tube is received and supported only by the one-piece housing, for greater stability and simplified assembly. The fact that the tube is supported by the stop limits the lateral movement generated by the rotor.
- It is understood that a lateral support is a support which prevents the displacement of the tube along the axis of rotation of the rotor.
-
- The receiving head and the support body are integral with each other, and the cavity of the receiving head comprises the stop, which is integral thereof.
- The receiving head comprises two opposite walls integral with each other and forming two stops to support the flexible tube laterally. It is understood that the two opposite walls are walls of the cavity.
- The housing comprises an orifice for receiving the rotational shaft, preferably two orifices arranged on two opposite walls of the housing to form bearings. Thus, the rotational shaft of the rotor is entirely carried by the housing and not by two parts arranged on each side of the rotor and which must be assembled to each other. Preferably, the orifice is configured to allow the rotational shaft to rotate under the action of a drive means of the rotor.
- The peristaltic pump is configured to receive a flexible tube having a fluid inlet and a fluid outlet, the housing comprising means for attaching the fluid inlet and/or the fluid outlet of the flexible tube, for example slots for receiving the fluid inlet and/or the fluid outlet. The attachment means minimise the movement of the flexible tube generated by its deformation. They support the tube in the position and under the tension required for its stability for the fluid to flow when the rotor is moving. This arrangement also increases the lifetime of the tube and prevents a possible leak due to wear. If slots are used, the flexible tube can be attached by clamping.
- The peristaltic pump comprises a flexible tube, the flexible tube comprising complementary attachment means configured to cooperate with the attachment means, the complementary attachment means and the flexible tube preferably being formed as one piece. The complementary attachment means improve the attachment of the tube, while not requiring the assembly of additional components.
- The peristaltic pump comprises at least one added connector, configured to connect the flexible tube to a liquid product reservoir or a liquid product dispensing unit, the connector comprising the complementary attachment means configured to cooperate with the attachment means.
- This invention also relates to a method for assembling a peristaltic pump as described previously, comprising the following steps:
-
- Assembling the flexible tube on the rotor or in the receiving head of the housing,
- Assembling the rotor in the housing,
- Connecting the rotational shaft of the rotor to a drive means.
- Optionally, the assembly method also comprises the following steps:
-
- Deforming the assembly opening and/or a part of the rotor,
- Inserting the rotational shaft of the rotor into the opening up to the assembled position.
- The invention further relates to a liquid product dispensing device, comprising:
-
- A liquid product dispensing unit,
- A liquid product reservoir,
- A peristaltic pump as described previously, connecting the dispensing unit and the reservoir.
- The invention will be better understood on reading the following description, given solely by way of example and with reference to the accompanying drawings in which:
-
FIG. 1 is a cross-sectional view of a peristaltic pump according to a first embodiment of the invention; -
FIG. 2 is an exploded perspective view of the peristaltic pump ofFIG. 1 ; -
FIG. 3 is a cross-sectional and perspective view of a housing of the peristaltic pump ofFIG. 1 ; -
FIG. 4 is an exploded perspective view of a peristaltic pump according to a second embodiment of the invention; -
FIG. 5 is a perspective view of the assembled peristaltic pump ofFIG. 4 ; -
FIG. 6 is an exploded perspective view of a peristaltic pump according to a third embodiment of the invention; and -
FIG. 7 is a perspective view of the assembled peristaltic pump ofFIG. 6 . -
FIGS. 1 to 3 show a peristaltic pump according to a first embodiment of the invention, designated by the general reference 1. The peristaltic pump 1 comprises a one-piece housing 10 as shown onFIG. 2 . Thehousing 10 comprises an upper part, forming ahead 18 for receiving theflexible tube 30, having the general shape of a half-cylinder, and a lower part forming asupport body 19. The lower part forming asupport body 19 consists of two oppositevertical walls 191, arranged in the extension of the cylindrical surface of the upper part forming a receivinghead 18, and of two oppositelateral walls 192, which are substantially in the same plane as the flat surfaces of the upper part forming a receivinghead 18. - The peristaltic pump 1 is configured to receive a
flexible tube 30 which is shown onFIGS. 1 and 2 . Theflexible tube 30 has afluid inlet 31 and afluid outlet 32. Thefluid inlet 31 is intended to be connected to a liquid product reservoir and thefluid outlet 32 is intended to be connected to a liquid product dispensing unit. Thus, once in operation, the peristaltic pump 1 transfers liquid product from the reservoir to the dispensing unit. In this example, the product dispensed is a medication and dispensing is carried out by injection using a catheter. - The upper part forms a
head 18 for receiving theflexible tube 30 and comprises acavity 181 configured to receive theflexible tube 30. This is shown onFIG. 3 which is a cross-sectional and perspective view of a first half-part of thehousing 10 according to a first plane of symmetry P1 of thehousing 10. Consequently, it is understood that thecavity 181 has a U-shaped profile according to the first plane of symmetry P1 of thehousing 10. - The receiving
head 18 further comprises astop 14 as shown onFIG. 3 , supporting theflexible tube 30 laterally. It is understood that thisstop 14 is also present on the other half-part of the housing 10 (not shown on this figure). - The peristaltic pump 1 further comprises a
rotor 20 comprising arotational shaft 25 shown onFIG. 2 . Therotor 20 is configured to be rotationally driven so as to deform a part of theflexible tube 30 located in the upper part forming a receivinghead 18 of thehousing 10. Thus, the upper part forms ahead 18 of thehousing 10 for receiving theflexible tube 30. Therotor 20 comprises threerollers 23 mounted respectively on arod 24 so that each associated roller can rotate freely. Therotor 20 further comprises afirst plate 21 and asecond plate 22 mounted on each side of therollers 23. At least thefirst plate 21 comprises a hollow 27 at its center intended to cooperate with a drive means 40, as shown onFIG. 2 , actuated by an electric motor. For example, the drive means 40 can be a cylinder provided with aprotuberance 41 having a shape complementary to that of the hollow 27. Thus, theprotuberance 41 on the drive means 40 couples with the hollow 27 of thefirst plate 21 so that the drive means 40 can rotate thefirst plate 21 and theentire rotor 20. Thefirst plate 21 and thesecond plate 22 further compriseholes 26 to receive one end of eachrod 24 so that when therotor 20 is rotated, thefirst plate 21 and thesecond plate 22 drive therods 24 which in turn drive therollers 23 so that they rotate around therotational shaft 25. - Each
roller 23 is arranged so as to compress a portion of theflexible tube 30 facing it against the receivinghead 18 when the peristaltic pump 1 is assembled. Thus, when therotor 20 rotates, therollers 23 which block portions of theflexible tube 30 as they rotate will move the liquid product contained in the tube in the same direction. The liquid product at the inlet of the peristaltic pump 1 can then be sucked in due to the elasticity of theflexible tube 30. This is the traditional operation of a peristaltic pump known in the technical field and which will therefore not be described in detail here. - Still referring to
FIGS. 1 to 3 , the lower part forms abody 19 of thehousing 10 for supporting therotational shaft 25 of therotor 20, therotational shaft 25 being mounted to rotate freely relative to thesupport body 19. To do this, thehousing 10 comprises twoorifices 11 for receiving therotational shaft 25, theorifices 11 being arranged on the twolateral walls 192 of thehousing 10 to form bearings. Therotor 20 comprises respectively on thefirst plate 21 and the second plate 22 adisc 211 extending from thefirst plate 21 or thesecond plate 22 of diameter substantially equal to that of theorifices 11, eachdisc 211 cooperating with acorresponding orifice 11 to support therotor 20 in thesupport body 19. In the example shown, thedisc 211 forms therotational shaft 25. - As shown on
FIGS. 1 to 3 , thehousing 10 comprises anassembly opening 12 arranged at the end of thesupport body 19 which is arranged on the side opposite the receivinghead 18. Therotor 20 is assembled in thehousing 10 through thisassembly opening 12. Thehousing 10 further comprises deformable means 13, 13′ used to deform theassembly opening 12 when assembling therotor 20. In the example shown, the deformable means 13, 13′ compriseramps 13 carried by thehousing 10, in particular at thesupport body 19. For example, eachramp 13 is arranged on avertical wall 191 as shown onFIGS. 2 and 3 . Theramps 13 come into contact with therotational shaft 25 of therotor 20. When therotor 20 is forced into theassembly opening 12, therotational shaft 25 exerts a pressure on theramps 13, and on thelateral walls 192, tending to push them apart, thus deforming theassembly opening 12 to facilitate the assembly of therotor 20. In this example illustrated and as shown onFIG. 3 , theramp 13 extends between theassembly opening 12 and theorifice 11. - Advantageously, the deformable means 13, 13′ further comprise
recesses 13′ making it easier to deform theassembly opening 12. In the example shown onFIG. 3 , eachlateral wall 192 comprises twolongitudinal recesses 13′ arranged on each side of theorifice 11 and of theramp 13. - To hold the
flexible tube 30 in position as therotor 20 moves, thehousing 10 comprises means 15 for attaching thefluid inlet 31 and thefluid outlet 32 of theflexible tube 30. In the example shown onFIG. 2 , the attachment means 15 are receivingslots 15 having a first semi-circular area 151 connected to a secondlongitudinal area 152. Each receivingslot 15 is arranged on avertical wall 191 at theassembly opening 12. As shown onFIGS. 1 and 2 , theflexible tube 30 comprises complementary attachment means 33 comprising, in this first embodiment, a firstcylindrical portion 331 of diameter slightly greater than the width of thesecond area 152 of the receivingslot 15 for a tight assembly. The complementary attachment means 33 further comprise asecond portion 332 having the shape of a disc and connected to thefirst portion 331. The diameter of the disc formed by thesecond portion 332 is greater than that of the first area 151 of the receivingslot 15. Each of the first andsecond portions flexible tube 30 and forms one piece with it. In this example, they are integrally molded with theflexible tube 30. The complementary attachment means 33 are arranged at two positions of theflexible tube 30 to cooperate with all the receivingslots 15 present on thehousing 10. - When assembling the peristaltic pump 1, the
flexible tube 30 is first assembled on therotor 20 or in the receivinghead 18 of thehousing 10. The rotor is then assembled in thehousing 10 and therotational shaft 25 of therotor 20 is connected to the drive means 40, taking care to insert thefirst portion 331 of the complementary attachment means 33 into the receivingslot 15. - A second embodiment is shown on
FIGS. 4 and 5 and only the differences compared with the first embodiment of the invention are described as follows: - In this second embodiment, the complementary attachment means 34 comprise two
rings 34 arranged at two positions of theflexible tube 30, therings 34 and theflexible tube 30 being formed as one piece. In this second embodiment, the attachment means 16 comprise twocavities 16 of shape substantially complementary to that of thering 34. Thus, when the peristaltic pump 1 is assembled as shown onFIG. 5 , eachring 34 is tightly inserted into thecavity 16 to support theflexible tube 30. - A third embodiment is shown on
FIGS. 6 and 7 and only the differences compared with the first embodiment of the invention are described as follows: - The peristaltic pump 1 comprises two
connectors 50 having a tubular body which are added and connected respectively to thefluid inlet 31 and to thefluid outlet 32. Theconnectors 50 thus connect theflexible tube 30 to a liquid product reservoir and to a liquid product dispensing unit. Eachconnector 50 comprises complementary attachment means 35 between the two ends of theconnector 50 and extending therefrom. In this third embodiment, the attachment means 17 comprise twocavities 17 of shape substantially complementary to a part, for example half of the complementary attachment means 35. Thus, when the peristaltic pump 1 is assembled as shown onFIG. 7 , each complementary attachment means 35 is tightly inserted into thecavity 17 to support theflexible tube 30. - The invention is not limited to the embodiments described and other embodiments will be clearly apparent to those skilled in the art. In particular, it is possible to deform a part of the
rotor 20, for example therotational shaft 25, during the assembly. Therotational shaft 25 can be retractable and retracted when assembling the peristaltic pump in order to insert therotor 20 into theassembly opening 12.
Claims (14)
1. A peristaltic pump comprising:
a rotor comprising a rotational shaft and configured to be rotationally driven to deform a flexible tube,
a housing comprising a receiving head for receiving the flexible tube and a support body for supporting the rotational shaft of the rotor, the rotational shaft being mounted to rotate freely relative to the support body,
the receiving head and the support body of the housing being formed as one piece.
2. The peristaltic pump according to claim 1 , wherein the housing comprises:
an assembly opening through which the rotor is assembled in the housing and,
a deformable member configured to deform the assembly opening and/or a part of the rotor when assembling the rotor.
3. The peristaltic pump according to claim 2 , wherein the deformable member comprises a ramp carried by the housing and configured to cooperate with the rotational shaft of the rotor to deform the assembly opening.
4. The peristaltic pump according to claim 2 , wherein the deformable member comprise a recess configured to deform the assembly opening.
5. The peristaltic pump according to claim 1 , wherein the receiving head comprises a cavity configured to receive the flexible tube and a stop configured to support the flexible tube laterally.
6. The peristaltic pump according to claim 5 , wherein the receiving head and the support body are integral with each other, and the cavity of the receiving head comprises the stop, which is integral thereof.
7. The peristaltic pump according to claim 5 , wherein the receiving head comprises two opposite walls integral with each other and forming two stops configured to support the flexible tube laterally.
8. The peristaltic pump according to claim 1 , wherein the housing comprises an orifice for receiving the rotational shaft, preferably two orifices arranged on two opposite walls of the housing to form bearings.
9. The peristaltic pump according to claim 1 , wherein the flexible tube comprises a fluid inlet and a fluid outlet, wherein the housing comprises at least one attaching member for attaching the fluid inlet and/or the fluid outlet of the flexible tube.
10. The peristaltic pump according to claim 9 , wherein the flexible tube comprises at least one complementary attachment member configured to cooperate with the at least one member of the housing, the at least one complementary attachment member and the flexible tube being formed as one piece.
11. The peristaltic pump according to claim 10 , comprising at least one added connector configured to connect the flexible tube to a liquid product reservoir or a liquid product dispensing unit, the at least one added connector comprising the at least one complementary attachment member configured to cooperate with the at least one attachment member of the housing.
12. A method for assembling a peristaltic pump according to claim 1 , comprising the following steps:
assembling the flexible tube on the rotor or in the receiving head of the housing,
assembling the rotor in the housing, and
connecting the rotational shaft of the rotor to a drive member.
13. A liquid product dispensing device comprising:
a liquid product dispensing unit,
a liquid product reservoir, and
a peristaltic pump according to claim 1 , connecting the dispensing unit and the reservoir.
14. The peristaltic pump according to claim 9 , wherein the at least one attachment member comprises one or more slots for receiving the fluid inlet and/or the fluid outlet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1912465 | 2019-11-06 | ||
FR1912465A FR3102811B1 (en) | 2019-11-06 | 2019-11-06 | Peristaltic pump with one-piece pump body and easy assembly |
PCT/EP2020/081249 WO2021089762A1 (en) | 2019-11-06 | 2020-11-06 | Peristaltic pump with one-piece pump body and facilitated assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220389923A1 true US20220389923A1 (en) | 2022-12-08 |
Family
ID=69700039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/775,194 Pending US20220389923A1 (en) | 2019-11-06 | 2020-11-06 | Peristaltic pump with one-piece pump body and facilitated assembly |
Country Status (3)
Country | Link |
---|---|
US (1) | US20220389923A1 (en) |
FR (1) | FR3102811B1 (en) |
WO (1) | WO2021089762A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2595772A (en) * | 2020-05-06 | 2021-12-08 | Blue White Ind Ltd | Rotor assembly with removable rollers |
US11939972B2 (en) | 2020-05-06 | 2024-03-26 | Blue-White Industries, Ltd. | Rotor assembly with removable rollers |
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Also Published As
Publication number | Publication date |
---|---|
WO2021089762A1 (en) | 2021-05-14 |
FR3102811A1 (en) | 2021-05-07 |
FR3102811B1 (en) | 2022-04-22 |
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