EP3436701B1 - Pump module for a pump for blood sample extraction - Google Patents

Pump module for a pump for blood sample extraction Download PDF

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Publication number
EP3436701B1
EP3436701B1 EP17717787.0A EP17717787A EP3436701B1 EP 3436701 B1 EP3436701 B1 EP 3436701B1 EP 17717787 A EP17717787 A EP 17717787A EP 3436701 B1 EP3436701 B1 EP 3436701B1
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EP
European Patent Office
Prior art keywords
pump
pumping assembly
assembly according
chamber
pumping
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EP17717787.0A
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German (de)
French (fr)
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EP3436701A1 (en
Inventor
Khaled Abou-Saleh
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Tecan Trading AG
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Tecan Trading AG
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Publication of EP3436701A1 publication Critical patent/EP3436701A1/en
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    • 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
    • F04B53/162—Adaptations of cylinders
    • 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
    • F04B53/007—Cylinder heads
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • 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 relates to the field of piston pumps used in automatic sampling, in particular pumps of the syringe type used for taking a blood sample with a view to its analysis by an automatic device.
  • the object of the invention is to provide means for manufacturing reliable pumps at low cost.
  • the invention provides a pumping assembly according to claim 1.
  • the pump body comprises a base and means for fixing said base on a frame.
  • the fixing means of the base may be devoid of an internal thread, and preferably are smooth bores.
  • the body may further include a side duct connecting a side wall of the chamber with the connection face.
  • the invention also relates to a family of pumping assembly according to the invention, characterized in that it comprises several pump bodies having identical external dimensions, each pump body having a specific chamber diameter.
  • the invention also relates to a pump comprising a pumping assembly according to the invention.
  • the figures 1 to 4 illustrate a pump body 10 intended to be mounted with a solenoid valve 11 on a pump 100.
  • an interface part 12 provides a fluid connection between the body 10 and the valve 11.
  • This interface part can be an independent part, it can be an integral part of the solenoid valve 11.
  • the body 10 is in a substantially cylindrical shape, of diameter D10, around a vertical axis X10.
  • This cylindrical shape is truncated in an upper part 14 by two flats forming two opposite faces 15,16, plane, vertical and parallel to each other.
  • the X10 axis is equidistant from the two faces 15,16.
  • the body Under the upper part 14, the body comprises a base 17 which is substantially cylindrical around the axis X10.
  • the upper part 14 extends vertically upwards from the base 17.
  • the thickness E17 of the base is small relative to the total height H10 of the body and to the diameter D10 of the body.
  • E17 ⁇ H10 / 4 and, E17 ⁇ D10 / 4.
  • the base comprises, on either side of the upper part, bores 18 vertically passing through the base. As shown in figure 9 , these bores 18 are provided to fix and position the body 10 on a central part 40 of the pump 100. Thanks to this arrangement, it is not necessary for the body to include an internal thread to fix it to a frame.
  • Bores 19 are formed in the upper part 14 of the body, perpendicular to the opposite faces 15,16.
  • the solenoid valve 11, via its interface 12, is fixed on a front face 15, among the opposite faces 15,16, of the body 10, so that it extends horizontally from this front face 15.
  • L Interface 12 has a substantially rectangular vertical section. It comprises a front face, vertical 21, against which the solenoid valve 11 is fixed, so that the latter extends horizontally from the front face 21 of the interface 12.
  • the solenoid valve 11 has a substantially rectangular, substantially vertical section. identical to that of the interface, so the interface and the solenoid valve form an assembly of substantially constant vertical section, in the extension of one another.
  • a counterpart 22 is fixed against the rear face 16, among the opposite faces 15,16, of the body 10.
  • Each bore 19, formed in the upper part 14 of the body, is arranged so that it opens out on the one hand on the front face 15, facing the interface 12, and, on the other hand, in the face on the rear face 16, facing the counterpart 22.
  • Each bore 19 is further formed to fit therein a fixing rod, not shown in the figures. Each rod passes through body 10, keeping it clamped between the interface 12 and the counterpart 22, fixing them to the body. Thanks to this arrangement, it is not necessary for the body to include an internal thread in order to fix the interface 12 and / or the counterpart 22 thereto.
  • the body further comprises a pumping chamber 26, substantially cylindrical about the axis X10.
  • the chamber comprises an opening 25 in a lower face 27 of the body, so as to be able to introduce therein a piston 41, shown in figure 9 .
  • the chamber extends through the base 17 into the upper part 14 of the body 10. It comprises an end upper 28 of frustoconical shape, forming a bottom 28 axially opposite to the opening 25. The diameter of the frustoconical bottom 28 decreases upwards.
  • the body 10 further comprises an elbow conduit 29 fluidly connecting the top of the upper end 29 of the chamber with the front face of the body, and beyond, with the fluidic interface 12.
  • the conduit 29 serves both intake and exhaust for a fluid in the pumping chamber 26.
  • the fluid is distributed by the solenoid valve 11.
  • the chamber 26 has a main diameter D26, measured in the part provided for the sliding of the piston 41 and a height H26, measured between the lower face 17 of the base 17 and the base of the frustoconical end
  • a width L14 of the body, between the two faces 15,16 of its upper part 14, is provided for chambers of several chamber diameters D26.
  • the diameter D26 of the chamber 26 of the figure 4 is smaller than that of room 26 of the figure 3 .
  • the rooms 26 of figures 3 and 4 also have the same height H26.
  • H26 the diameter of the piston must be adapted to the diameter D26 of the chamber, the possible stroke of the piston in the chamber remaining substantially the same.
  • the body 10 is designed to be mounted without a solenoid valve.
  • the bent duct it comprises a lateral duct 30, connecting a lateral wall 32 of the chamber, in the cylindrical zone of main diameter D26, with the front face 15.
  • the interface 12 used in this second embodiment is adapted to extend each of the conduits 29, 30 by respective conduits 34, 35, in order to connect them to the rest of the device.
  • the chamber is therefore connected with the front face 15 by two ducts, one serving for the admission of fluid into the chamber, the other duct serving for the escape of the fluid.
  • the interface 12 used in this second embodiment is fixed by two screws passing through the bores 19.
  • the family comprises four pump bodies 10, adapted to operate without a solenoid valve, each having a specific chamber diameter D26.
  • the body 10 of the second embodiment, illustrated in figures 5 to 8 differs from the body according to the first embodiment, illustrated in figures 1 to 4 , only in that it comprises a second duct 30 formed in a side wall of the chamber 26.
  • the body is fixed by bores, without tapping, it can be made by molding more precisely and at lower cost.
  • the molding of an internal thread is a complex operation; poor filling of material around the core forming the mold for tapping produces fracture initiators in the injected material, which reduces the reliability of the part thus manufactured, and can lead to the scrapping of many parts, which increases it the cost of manufacture.
  • connection face can have a shape other than planar, provided that it can be mounted with sealing against the interface. It can be cylindrical or spherical.
  • a flat connection face may include a flat surface and suitable recesses to allow manufacture by molding, in particular to avoid excessively large thicknesses of the walls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

La présente invention se rapporte au domaine des pompes à piston utilisées dans les prélèvements automatiques, notamment des pompes du type seringue utilisées pour le prélèvement d'un échantillon sanguin en vue de son analyse par un appareil automatique.The present invention relates to the field of piston pumps used in automatic sampling, in particular pumps of the syringe type used for taking a blood sample with a view to its analysis by an automatic device.

Les publications FR 2 974 155 , FR 2 895 919 A1 , WO 2008/009797 A2 et EP 2 873 861 A2 décrivent de telles pompes.The publications FR 2 974 155 , FR 2 895 919 A1 , WO 2008/009797 A2 and EP 2 873 861 A2 describe such pumps.

Cependant, ces pompes sont particulièrement onéreuses à fabriquer, puisqu'elles doivent être fabriquées dans différentes configurations, selon le volume de pompage nécessaire et selon qu'elles sont équipées d'une électrovanne ou pas.However, these pumps are particularly expensive to manufacture, since they must be manufactured in different configurations, depending on the pumping volume required and whether or not they are equipped with a solenoid valve.

L'invention a pour but de proposer des moyens pour fabriquer des pompes fiables, à faible coût.The object of the invention is to provide means for manufacturing reliable pumps at low cost.

Pour atteindre son but, l'invention propose un ensemble de pompage selon la revendication 1.To achieve its goal, the invention provides a pumping assembly according to claim 1.

Avantageusement, le corps de pompe comprend une base et des moyens pour fixer ladite base sur un châssis. Les moyens de fixation de la base peuvent être dépourvus de taraudage, et, de préférence, sont des alésages lisses.Advantageously, the pump body comprises a base and means for fixing said base on a frame. The fixing means of the base may be devoid of an internal thread, and preferably are smooth bores.

Le corps peut en outre comprendre un conduit latéral reliant une paroi latérale de la chambre avec la face de connexion.The body may further include a side duct connecting a side wall of the chamber with the connection face.

L'invention porte aussi sur une famille d'ensemble de pompage selon l'invention, caractérisée en ce qu'elle comprend plusieurs corps de pompes ayant des dimensions extérieures identiques, chaque corps de pompe ayant un diamètre de chambre spécifique.The invention also relates to a family of pumping assembly according to the invention, characterized in that it comprises several pump bodies having identical external dimensions, each pump body having a specific chamber diameter.

L'invention porte aussi sur une pompe comprenant un ensemble de pompage selon l'invention.The invention also relates to a pump comprising a pumping assembly according to the invention.

Plusieurs modes d'exécution de l'invention seront décrits ci-après, à titre d'exemples non limitatifs, en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en perspective d'un ensemble comprenant un corps de pompe selon un premier mode de réalisation de l'invention et une électrovanne fixée sur ce corps de pompe ;
  • la figure 2 est une vue en élévation et de face, du corps de pompe de la figure 1 ;
  • la figure 3 est une coupe longitudinale, en élévation, selon le plan III-III de la figure 2, de l'ensemble de la figure 1 ;
  • la figure 4 est une vue similaire à celle de la figure 3, dans laquelle le corps de pompe comprend une chambre d'un diamètre inférieur à celui de la chambre de la figure 4 ;
  • la figure 5 est une vue en perspective d'un corps de pompe selon un deuxième mode de réalisation de l'invention, sans électrovanne ;
  • la figure 6 est une vue similaire à la vue en perspective de la figure 5, dans laquelle le corps est en outre représenté coupé longitudinalement, selon le plan VI-VI de la figure 7 ;
  • la figure 7 est une vue de face et en élévation du corps de pompe de la figure 5 ;
  • la figure 8 représente quatre coupes selon VI-VI, chacune d'un corps de pompe avec un diamètre de chambre respectif ; et,
  • la figure 9 illustre une pompe équipée d'un corps selon l'invention.
Several embodiments of the invention will be described below, by way of nonlimiting examples, with reference to the appended drawings in which:
  • The figure 1 is a perspective view of an assembly comprising a pump body according to a first embodiment of the invention and a solenoid valve fixed to this pump body;
  • the figure 2 is a front elevational view of the pump body of the figure 1 ;
  • the figure 3 is a longitudinal section, in elevation, according to the plane III-III of the figure 2 , of the whole figure 1 ;
  • the figure 4 is a view similar to that of the figure 3 , in which the pump body comprises a chamber of a diameter smaller than that of the chamber of the figure 4 ;
  • the figure 5 is a perspective view of a pump body according to a second embodiment of the invention, without a solenoid valve;
  • the figure 6 is a view similar to the perspective view of the figure 5 , in which the body is further shown cut longitudinally, along the plane VI-VI of the figure 7 ;
  • the figure 7 is a front elevational view of the pump body of the figure 5 ;
  • the figure 8 shows four sections along VI-VI, each of a pump body with a respective chamber diameter; and,
  • the figure 9 illustrates a pump equipped with a body according to the invention.

Dans la description, les termes vertical et avant, notamment, sont attribués arbitrairement, en fonction de la disposition des figures principales. Ces termes ne sont pas limitatifs, et les éléments décrits peuvent avoir une disposition différente lorsqu'ils sont implémentés sur un appareil.In the description, the terms vertical and front, in particular, are assigned arbitrarily, depending on the arrangement of the main figures. These terms are not limiting, and the elements described may have a different arrangement when implemented on a device.

Les figures 1 à 4 illustrent un corps de pompe 10 prévu pour être monté avec une électrovanne 11 sur une pompe 100. Dans l'exemple illustré, une pièce d'interface 12 assure une connexion fluidique entre le corps 10 et la vanne 11. Cette pièce d'interface peut être une pièce indépendante, elle peut être une partie intégrante de l'électrovanne 11.The figures 1 to 4 illustrate a pump body 10 intended to be mounted with a solenoid valve 11 on a pump 100. In the example illustrated, an interface part 12 provides a fluid connection between the body 10 and the valve 11. This interface part can be an independent part, it can be an integral part of the solenoid valve 11.

Le corps 10 s'inscrit dans une forme sensiblement cylindrique, de diamètre D10, autour d'un axe vertical X10. Cette forme cylindrique est tronquée dans une partie supérieure 14 par deux méplats formant deux faces 15,16 opposées, planes, verticales et parallèles entre elles. L'axe X10 est équidistant des deux faces 15,16.The body 10 is in a substantially cylindrical shape, of diameter D10, around a vertical axis X10. This cylindrical shape is truncated in an upper part 14 by two flats forming two opposite faces 15,16, plane, vertical and parallel to each other. The X10 axis is equidistant from the two faces 15,16.

Sous la partie supérieure 14, le corps comprend une base 17 sensiblement cylindrique autour de l'axe X10. La partie supérieure 14 s'étend verticalement vers le haut depuis la base 17. L'épaisseur E17 de la base est faible relativement à la hauteur totale H10 du corps et au diamètre D10 du corps. Dans l'exemple illustré, E17 < H10 / 4, et, E17 < D10 / 4. La base comprend, de part et d'autre de la partie supérieure, des alésages 18 traversants verticalement la base. Comme illustré à la figure 9, ces alésages 18 sont prévus pour fixer et positionner le corps 10 sur une pièce centrale 40 de la pompe 100. Grâce à cette disposition, il n'est pas nécessaire que le corps comprenne de taraudage pour le fixer sur un châssis.Under the upper part 14, the body comprises a base 17 which is substantially cylindrical around the axis X10. The upper part 14 extends vertically upwards from the base 17. The thickness E17 of the base is small relative to the total height H10 of the body and to the diameter D10 of the body. In the example illustrated, E17 <H10 / 4, and, E17 <D10 / 4. The base comprises, on either side of the upper part, bores 18 vertically passing through the base. As shown in figure 9 , these bores 18 are provided to fix and position the body 10 on a central part 40 of the pump 100. Thanks to this arrangement, it is not necessary for the body to include an internal thread to fix it to a frame.

Des alésages 19 sont formés dans la partie supérieure 14 du corps, perpendiculairement aux faces opposées 15,16.Bores 19 are formed in the upper part 14 of the body, perpendicular to the opposite faces 15,16.

L'électrovanne 11, par l'intermédiaire de son interface 12, est fixée sur une face avant 15, parmi les faces opposées 15,16, du corps 10, de sorte qu'elle s'étend horizontalement depuis cette face avant 15. L'interface 12 a une section verticale sensiblement rectangulaire. Elle comprend une face avant, verticale 21, contre laquelle est fixée l'électrovanne 11, de sorte que cette dernière s'étend horizontalement depuis la face avant 21 de l'interface 12. L'électrovanne 11 a une section verticale sensiblement rectangulaire, sensiblement identique à celle de l'interface, de sorte l'interface et l'électrovanne forment un ensemble de section verticale sensiblement constante, dans le prolongement l'une de l'autre.The solenoid valve 11, via its interface 12, is fixed on a front face 15, among the opposite faces 15,16, of the body 10, so that it extends horizontally from this front face 15. L Interface 12 has a substantially rectangular vertical section. It comprises a front face, vertical 21, against which the solenoid valve 11 is fixed, so that the latter extends horizontally from the front face 21 of the interface 12. The solenoid valve 11 has a substantially rectangular, substantially vertical section. identical to that of the interface, so the interface and the solenoid valve form an assembly of substantially constant vertical section, in the extension of one another.

Une contre-pièce 22 est fixée contre la face arrière 16, parmi les faces opposées 15,16, du corps 10. Chaque alésage 19, formé dans la partie supérieure 14 du corps, est disposé de sorte qu'il débouche d'une part sur la face avant 15, en vis-à-vis de l'interface 12, et, d'autre part, dans la face sur la face arrière 16, en vis-à-vis de la contre-pièce 22. Chaque alésage 19 est en outre formé pour y introduire de façon ajustée une tige de fixation, non représentée aux figures. Chaque tige traverse le corps 10, en le maintenant pincé entre l'interface 12 et la contre-pièce 22, les fixant au corps. Grâce à cette disposition, il n'est pas nécessaire que le corps comprenne de taraudage pour y fixer l'interface 12 et/ou la contrepièce 22.A counterpart 22 is fixed against the rear face 16, among the opposite faces 15,16, of the body 10. Each bore 19, formed in the upper part 14 of the body, is arranged so that it opens out on the one hand on the front face 15, facing the interface 12, and, on the other hand, in the face on the rear face 16, facing the counterpart 22. Each bore 19 is further formed to fit therein a fixing rod, not shown in the figures. Each rod passes through body 10, keeping it clamped between the interface 12 and the counterpart 22, fixing them to the body. Thanks to this arrangement, it is not necessary for the body to include an internal thread in order to fix the interface 12 and / or the counterpart 22 thereto.

Le corps comprend en outre une chambre de pompage 26, sensiblement cylindrique autour de l'axe X10. La chambre comprend une ouverture 25 dans une face inférieure 27 du corps, de façon à pouvoir y introduire un piston 41, représenté à la figure 9. La chambre s'étend au travers de la base 17 jusque dans la partie supérieure 14 du corps 10. Elle comprend une extrémité supérieure 28 de forme tronconique, formant un fond 28 axialement opposé à l'ouverture 25. Le diamètre du fond tronconique 28 va en se réduisant vers le haut. Le corps 10 comprend en outre un conduit 29 coudé reliant fluidiquement le sommet de l'extrémité supérieure 29 de la chambre avec la face 15 avant du corps, et au-delà, avec l'interface fluidique 12. Le conduit 29 sert à la fois d'admission et d'échappement pour un fluide dans la chambre de pompage 26. La distribution du fluide est assurée par l'électrovanne 11. La chambre 26 a un diamètre principal D26, mesuré dans la partie prévue pour le coulissement du piston 41 et une hauteur H26, mesurée entre la face inférieure 17 de la base 17 et la base de l'extrémité tronconique 28.The body further comprises a pumping chamber 26, substantially cylindrical about the axis X10. The chamber comprises an opening 25 in a lower face 27 of the body, so as to be able to introduce therein a piston 41, shown in figure 9 . The chamber extends through the base 17 into the upper part 14 of the body 10. It comprises an end upper 28 of frustoconical shape, forming a bottom 28 axially opposite to the opening 25. The diameter of the frustoconical bottom 28 decreases upwards. The body 10 further comprises an elbow conduit 29 fluidly connecting the top of the upper end 29 of the chamber with the front face of the body, and beyond, with the fluidic interface 12. The conduit 29 serves both intake and exhaust for a fluid in the pumping chamber 26. The fluid is distributed by the solenoid valve 11. The chamber 26 has a main diameter D26, measured in the part provided for the sliding of the piston 41 and a height H26, measured between the lower face 17 of the base 17 and the base of the frustoconical end 28.

Comme illustré aux figures 3 et 4, une largeur L14 du corps, entre les deux faces 15,16 de sa partie supérieure 14, est prévue pour des chambres de plusieurs diamètres D26 de chambres. Comme illustré, pour une même largeur L14, le diamètre D26 de la chambre 26 de la figure 4 est plus petit que celui de la chambre 26 de la figure 3. Ainsi, pour des dimensions extérieures identiques, on peut fabriquer plusieurs corps avec des volumes de chambres différents, chacun adapté à un usage spécifique.As shown in figures 3 and 4 , a width L14 of the body, between the two faces 15,16 of its upper part 14, is provided for chambers of several chamber diameters D26. As illustrated, for the same width L14, the diameter D26 of the chamber 26 of the figure 4 is smaller than that of room 26 of the figure 3 . Thus, for identical external dimensions, it is possible to manufacture several bodies with different chamber volumes, each suitable for a specific use.

Les chambres 26 des figures 3 et 4 ont en outre la même hauteur H26. Ainsi, seul le diamètre du piston doit être adapté au diamètre D26 de la chambre, la course possible du piston dans la chambre restant sensiblement la même. Ainsi, pour modifier le volume de pompage dans un dispositif de pompage 10-12, il suffit de modifier le couple piston/corps de pompe, le reste du dispositif étant identique.The rooms 26 of figures 3 and 4 also have the same height H26. Thus, only the diameter of the piston must be adapted to the diameter D26 of the chamber, the possible stroke of the piston in the chamber remaining substantially the same. Thus, to modify the pumping volume in a pumping device 10-12, it suffices to modify the piston / pump body pair, the rest of the device being identical.

On va maintenant décrire un deuxième mode de réalisation pour un corps selon l'invention, en ce qu'il diffère du mode de réalisation précédent, en référence aux figures 5 à 9.We will now describe a second embodiment for a body according to the invention, in that it differs from the previous embodiment, with reference to figures 5 to 9 .

Aux figures 5 à 9, le corps 10 est prévu pour être monté sans électrovanne. Ainsi, outre le conduit coudé, il comprend un conduit latéral 30, reliant une paroi latérale 32 de la chambre, dans la zone cylindrique de diamètre principal D26, avec la face avant 15. L'interface 12 utilisée dans ce deuxième mode de réalisation est adaptée pour prolonger chacun des conduits 29, 30 par des conduits 34, 35 respectifs, afin de les connecter au reste de l'appareil. La chambre est donc reliée avec la face avant 15 par deux conduits, l'un servant à l'admission de fluide dans la chambre, l'autre conduit servant à l'échappement du fluide. L'interface 12 utilisée dans ce deuxième mode de réalisation est fixée par deux vis passant à travers les alésages 19.To the figures 5 to 9 , the body 10 is designed to be mounted without a solenoid valve. Thus, in addition to the bent duct, it comprises a lateral duct 30, connecting a lateral wall 32 of the chamber, in the cylindrical zone of main diameter D26, with the front face 15. The interface 12 used in this second embodiment is adapted to extend each of the conduits 29, 30 by respective conduits 34, 35, in order to connect them to the rest of the device. The chamber is therefore connected with the front face 15 by two ducts, one serving for the admission of fluid into the chamber, the other duct serving for the escape of the fluid. The interface 12 used in this second embodiment is fixed by two screws passing through the bores 19.

Comme illustré à la figure 8, et comme précédemment décrit en référence aux figures 3 et 4, il est possible de réaliser une famille de corps de pompe ayant chacun un volume de chambre différent, uniquement en modifiant le diamètre D26 de la chambre 26. Dans l'exemple illustré à la figure 8, la famille comprend quatre corps de pompe 10, adaptés à fonctionner sans électrovanne, ayant chacun un diamètre de chambre D26 spécifique.As shown in figure 8 , and as previously described with reference to figures 3 and 4 , it is possible to produce a family of pump bodies each having a different chamber volume, only by modifying the diameter D26 of the chamber 26. In the example illustrated in figure 8 , the family comprises four pump bodies 10, adapted to operate without a solenoid valve, each having a specific chamber diameter D26.

Ainsi, le corps 10 du deuxième mode de réalisation, illustré aux figures 5 à 8 diffère du corps selon le première mode de réalisation, illustré aux figures 1 à 4, seulement en ce qu'il comprend un deuxième conduit 30 formé dans une paroi latérale de la chambre 26.Thus, the body 10 of the second embodiment, illustrated in figures 5 to 8 differs from the body according to the first embodiment, illustrated in figures 1 to 4 , only in that it comprises a second duct 30 formed in a side wall of the chamber 26.

Selon l'invention, on peut donc fabriquer des ensembles de pompage avec ou sans électrovanne, ayant des volumes de chambre spécifiques, mais dont les corps de pompe 10 ont tous les mêmes dimensions extérieures D10, H10, L14. Pour fabriquer un tel corps de pompe 10, il suffit de disposer d'un unique moule extérieur, et d'un premier noyau spécifique adapté à former une chambre d'un diamètre D26 donné et d'un noyau utilisé seulement pour réaliser le conduit latéral, si nécessaire. Les autres noyaux restent, de préférence, identiques quel que soit le type de corps de pompe 10.According to the invention, it is therefore possible to manufacture pumping assemblies with or without a solenoid valve, having specific chamber volumes, but the pump bodies 10 of which all have the same external dimensions D10, H10, L14. To manufacture such a pump body 10, it suffices to have a single external mold, and a first specific core adapted to form a chamber with a given diameter D26 and a core used only for make the side duct, if necessary. The other cores preferably remain the same regardless of the type of pump body 10.

En outre, le corps étant fixé par des alésages, sans taraudage, il peut être fabriqué par moulage avec plus de précision et à moindre coût. En effet, le moulage d'un taraudage est une opération complexe ; un mauvais remplissage de matière autour du noyau formant moule pour le taraudage produit des amorces de rupture dans la matière injectée, ce qui diminue la fiabilité de la pièce ainsi fabriquée, et peut conduire à la mise au rebus de nombreuses pièces, ce qui en augmente le coût de fabrication.Furthermore, since the body is fixed by bores, without tapping, it can be made by molding more precisely and at lower cost. Indeed, the molding of an internal thread is a complex operation; poor filling of material around the core forming the mold for tapping produces fracture initiators in the injected material, which reduces the reliability of the part thus manufactured, and can lead to the scrapping of many parts, which increases it the cost of manufacture.

Bien sûr, l'invention n'est pas limitée aux modes de réalisation préférés qui viennent d'être décrits mais, au contraire, l'invention est définie par les revendications qui suivent.Of course, the invention is not limited to the preferred embodiments which have just been described but, on the contrary, the invention is defined by the claims which follow.

Il apparaîtra en effet à l'homme de l'art que diverses modifications peuvent être apportées aux modes de réalisation décrits ci-dessus, à la lumière de l'enseignement qui vient de lui être divulgué.It will indeed appear to those skilled in the art that various modifications can be made to the embodiments described above, in the light of the teaching which has just been disclosed to him.

Ainsi, la face de connexion peut avoir une autre forme que plane, pourvu qu'elle puisse être montée avec étanchéité contre l'interface. Elle peut être cylindrique ou sphérique. Une face de connexion plane peut comporter une surface plane et des évidements adaptés pour permettre une fabrication par moulage, notamment pour éviter des épaisseurs trop importantes des parois.Thus, the connection face can have a shape other than planar, provided that it can be mounted with sealing against the interface. It can be cylindrical or spherical. A flat connection face may include a flat surface and suitable recesses to allow manufacture by molding, in particular to avoid excessively large thicknesses of the walls.

Claims (10)

  1. A pumping assembly for a pump for taking a blood sample, characterised in that it comprises a pump body (10) and a fluid interface, said pump body (10) comprising:
    - a pumping chamber (26) substantially cylindrical around a pumping axis (X10), comprising an opening for a piston to be introduced axially therein and a bottom (28) axially opposite said opening;
    - a connection face (15),
    - an angled pipe (29) connecting said bottom (28) to said face (15);
    - means (19) for fixing the fluid interface (12) on the said connexion face (15) of the said pump body (10) so that the connection face is fixed sealingly against said fluid interface;
    and
    the pumping assembly being characterised in that the means (19) for fixing are bores (19) devoid of thread formed in the said pump body (10), each of said bores designated to introduce a fixing rod therein.
  2. Pumping assembly according to claim 1, characterised in that it comprises a base (17) and means (18) for fixing said base to a frame.
  3. Pumping assembly according to claim 2, characterised in that the means (18) for fixing the base (17) are devoid of thread and are preferably smooth bores.
  4. Pumping assembly according to any of claims 1 to 3, characterised in that it further comprises a lateral pipe (30) connecting a lateral wall (32) of the chamber (26) to the connection face (15).
  5. Pumping assembly according to any of claims 1 to 4, characterised in that the connection face (15) is planar.
  6. Pumping assembly according to any of claims 1 to 5, characterised in that the connection face (15) is parallel to said axis (X10) of the body.
  7. Pumping assembly according to any of claims 1 to 6, characterised in that it comprises a solenoid valve (11) fluidically connected to the connection face (15) of said body by said interface (12).
  8. Pumping assembly according to claim 7, characterised in that the fluid interface forms an integral part of the solenoid valve.
  9. Family of pumping assembly according to any of the preceding claims, characterised in that it comprises a family of bodies, all pump bodies having identical outside dimensions, each pump body having a specific chamber diameter (D26).
  10. Pump (100) characterised in that it comprises a pumping assembly according to any of claims 1 to 8.
EP17717787.0A 2016-03-29 2017-03-27 Pump module for a pump for blood sample extraction Active EP3436701B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1652663A FR3049659B1 (en) 2016-03-29 2016-03-29 MODULAR PUMP BODY
PCT/FR2017/050698 WO2017168080A1 (en) 2016-03-29 2017-03-27 Modular pump housing

Publications (2)

Publication Number Publication Date
EP3436701A1 EP3436701A1 (en) 2019-02-06
EP3436701B1 true EP3436701B1 (en) 2020-12-02

Family

ID=56008783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17717787.0A Active EP3436701B1 (en) 2016-03-29 2017-03-27 Pump module for a pump for blood sample extraction

Country Status (5)

Country Link
US (1) US20190107107A1 (en)
EP (1) EP3436701B1 (en)
CN (1) CN108884827B (en)
FR (1) FR3049659B1 (en)
WO (1) WO2017168080A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235316C1 (en) * 1982-09-24 1984-01-05 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH, 5140 Erkelenz Closure for housing openings on piston pumps

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3667034B2 (en) * 1996-07-17 2005-07-06 光洋精工株式会社 Electric pump
US6991397B2 (en) * 2003-11-07 2006-01-31 Modular Systems, Inc. Dowel fastener and joints including same
FR2895919B1 (en) * 2006-01-11 2008-03-14 Pulssar Technologies Sarl PUMPING DEVICE.
FR2904066B1 (en) * 2006-07-18 2012-08-24 Pulssar Technologies PUMPING UNIT WITH HIGH LIFETIME.
FR2904065A1 (en) * 2006-07-18 2008-01-25 Pulssar Technologies Sarl Pumping unit for e.g. rinsing liquid substance sample, has guiding and connection module connecting pumping module and actuation module, and cylinder-spherical joint and cylindrical groove assembled to assure coupling between rod and piston
FR2974155B1 (en) * 2011-04-12 2015-12-18 Pulssar Technologies PISTON PUMP COMPRISING A FLAT GUIDE.
EP2873861A4 (en) * 2012-05-03 2016-09-21 Novag Spray Equipment S A Integral piston pump having an anti-leak system
US20140271264A1 (en) * 2013-03-15 2014-09-18 Anthony Florindi Piston pump drive train anti-backlash
CN104963961A (en) * 2015-06-26 2015-10-07 丁巧娜 Vehicle clutch pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235316C1 (en) * 1982-09-24 1984-01-05 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH, 5140 Erkelenz Closure for housing openings on piston pumps

Also Published As

Publication number Publication date
EP3436701A1 (en) 2019-02-06
FR3049659A1 (en) 2017-10-06
WO2017168080A1 (en) 2017-10-05
FR3049659B1 (en) 2019-09-06
CN108884827B (en) 2021-03-02
US20190107107A1 (en) 2019-04-11
CN108884827A (en) 2018-11-23

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