EP0604604B1 - Driving shaft for peristaltique pump and fabrication method - Google Patents
Driving shaft for peristaltique pump and fabrication method Download PDFInfo
- Publication number
- EP0604604B1 EP0604604B1 EP93911815A EP93911815A EP0604604B1 EP 0604604 B1 EP0604604 B1 EP 0604604B1 EP 93911815 A EP93911815 A EP 93911815A EP 93911815 A EP93911815 A EP 93911815A EP 0604604 B1 EP0604604 B1 EP 0604604B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- roller
- treated
- drive
- contact
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 4
- 239000002245 particle Substances 0.000 claims abstract description 16
- 230000002572 peristaltic effect Effects 0.000 claims description 10
- 238000005422 blasting Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000004381 surface treatment Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000005480 shot peening Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241001508691 Martes zibellina Species 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 241001639412 Verres Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel 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
- 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
Definitions
- the present invention relates to a drive shaft for a peristaltic pump and its manufacturing process.
- drive shafts are used to rotate rollers, which crush deformable tubes containing the liquid to be conveyed.
- the drive axes are connected by all appropriate links to a control motor.
- the control motor rotates the drive axis, which acts on at least one roller adjacent to it.
- the drive axes are metallic, they are more particularly made of stainless steel, while the rollers are made of various plastics.
- a bad drive of a rotary roller by an axis does not allow to have a regular and appropriate crushing of the deformable tube, with which a rotary roller comes into contact and, consequently, a good routing of the liquid to be conveyed.
- the present invention overcomes the aforementioned drawbacks by proposing a drive axis of rotary rollers, with which a drive is obtained without sliding of a roller by the axis.
- the drive is obtained without crushing the rollers and with a very low engine torque.
- the present invention also relates to the method of manufacturing such an axis.
- the present invention therefore creates a drive axis of at least one rotary roller, which is characterized in that the external part of said drive axis has surfaces treated by projection of particles to give it a controlled roughness capable of allowing a drive without sliding of the roller relative to the axis.
- the present invention also relates to a method of manufacturing a drive shaft of a peristaltic pump with rotary rollers from a cylindrical metal axis, in which the zone intended to come into contact with a rotary roller is turned, then rectified, in order to obtain a uniform, controlled surface condition, which is characterized in that at least part of said zone intended to come into contact with a roller is surface treated by spraying a material for give it a controlled roughness.
- FIG. 1 there is schematically and partially illustrated a peristaltic pump 4, with which three rollers 2 are rotated by a drive shaft 1 driven by a motor not shown.
- the drive axis 1 has several different zones on its external surface coming into contact with at least one roller 2 housed in the peristaltic pump 4.
- the drive axis 1 is integral with a shoulder 12 ensuring its retention in the peristaltic pump body.
- the control motor 5 of the drive shaft 1 is connected to the latter by a link 13, which can take any suitable form.
- the external surface 6 of the drive axis 1, coming into contact with at least one roller 2, comprises treated surfaces 7, 7 'cooperating with selective parts of the roller 2.
- Figure 2A shows the detail A of the upper end of the drive shaft 1.
- the upper part 8 of the drive shaft 1 has a rounded conical shape.
- the radius of curvature 9 of the cone is substantially equal to half the diameter 10 of the drive axis 1 at the level of the rollers 2.
- Figure 3 shows the cooperation between an example of a drive axis 1 according to the present invention, and a particular example of a rotary roller having a bulged configuration.
- the tube 3 is compressed by the middle part 11 of the rotary roller 2.
- the surface treatment of the drive axis 1 of the rollers 2 is what is known as shot blasting or billing.
- particles are projected at a certain angle and under a determined pressure, in order to obtain a controlled roughness of the selective parts of the drive axis having received the projections. solid particles.
- projections of solid particles can be, for example, projections of glass beads, tungsten particles, particles of various hard materials such as diamond. Naturally, it can also be various particles of sand.
- the drive shaft is manufactured under the following conditions.
- the axle is made of a material, for example steel, stainless.
- the axis is carried by a rotary head and is subjected to the projections of an oriented nozzle, approximately perpendicular to the axis, and driven by an alternating movement parallel thereto.
- the nozzle thus scans the selective parts 7, 7 ′ of the axis to be shot blasted.
- Shot blasting balls are glass balls or diamond crystals with an average size of 65 micrometers.
- the projection time was 5 seconds, at a distance of 100 mm, at a shooting angle of 90 °.
- the pressure of the machine projecting the abrasive was 2 bars.
- the drive axis 1 was again rectified in the parts 14 which have not received shot blasting or billing treatment.
- the axis is then subjected to a heat treatment accompanied by a deposit of titanium nitride, for example with a thickness equal to 2 micrometers.
- This treatment makes it possible to increase the surface hardness of the axis without changing its surface condition.
- the shot peening or billing treatment applied to the drive shaft 1 of the present invention ensures good drive of the roller (s) 2, without wear or abrasion of said roller (s) 2. There is no also no transfer of plastic particles on the axis, which could lead to blockage of the craters created by shot blasting or billing.
- the part of the drive shaft is fully polished before billing and, after the billing operations, the dimensions of the drive shaft 1 are not not modified, which allows excellent dimensional accuracy of the diameter of the drive axis 1 to be obtained.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Press Drives And Press Lines (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
La présente invention concerne un axe d'entraînement pour pompe péristaltique et son procédé de fabrication.The present invention relates to a drive shaft for a peristaltic pump and its manufacturing process.
Dans les pompes péristaltiques, on utilise des axes d'entraînement pour faire tourner des galets, qui écrasent des tubes déformables contenant le liquide à véhiculer.In peristaltic pumps, drive shafts are used to rotate rollers, which crush deformable tubes containing the liquid to be conveyed.
Ces axes sont reliés par toutes liaisons appropriées à un moteur de commande. Le moteur de commande assure la rotation de l'axe d'entraînement, qui agit sur au moins un galet qui lui est contigu.
Habituellement, les axes d'entraînement sont métalliques, ils sont plus particulièrement réalisés en acier inoxydable, tandis que les galets sont en diverses matières plastiques.These axes are connected by all appropriate links to a control motor. The control motor rotates the drive axis, which acts on at least one roller adjacent to it.
Usually, the drive axes are metallic, they are more particularly made of stainless steel, while the rollers are made of various plastics.
Les axes d'entraînement connus jusqu'à présent donnent généralement satisfaction. Cependant, on a constaté qu'après un certain temps d'utilisation, il se produisait, d'une part, une usure tant de l'axe d'entraînement que du galet et, d'autre part, un glissement entre l'axe et le galet, ce qui conduit à une mauvaise rotation et à un entraînement insatisfaisant.The drive axes known up to now generally give satisfaction. However, it was found that after a certain period of use, there was, on the one hand, wear and tear both of the drive axle and of the roller and, on the other hand, a sliding between the axle and the roller, which leads to poor rotation and unsatisfactory drive.
Un mauvais entraînement d'un galet rotatif par un axe ne permet pas d'avoir un écrasement régulier et approprié du tube déformable, avec lequel un galet rotatif vient en contact et, par conséquent, un bon acheminement du liquide à véhiculer.A bad drive of a rotary roller by an axis does not allow to have a regular and appropriate crushing of the deformable tube, with which a rotary roller comes into contact and, consequently, a good routing of the liquid to be conveyed.
Dans le passé, de nombreuses tentatives ont été réalisées pour essayer d'éviter ce phénomène de glissement, mais pour autant qu'on le sache, elles se sont révélées infructueuses car, en effet, il a été nécessaire de comprimer les galets pour obtenir un entraînement satisfaisant.In the past, many attempts have been made to try to avoid this sliding phenomenon, but as far as is known, they have proved unsuccessful because, in fact, it was necessary to compress the rollers to obtain a satisfactory training.
Selon le brevet américain US-2.899.904, il est proposé de rendre l'axe d'entraînement rugueux par moletage. Le résultat obtenu n'est pas stable dans le temps et peut produire une usure rapide des galets.According to American patent US-2,899,904, it is proposed to make the drive shaft rough by knurling. The result obtained is not stable over time and can produce rapid wear of the rollers.
Le brevet américain US-3.249.059 propose d'équiper l'axe d'entraînement de bagues en matière élastique. Les pièces rapportées sont une source potentielle de panne. De plus, elles ne permettent pas de remédier à tous les défauts d'entraînement et leur usure est rapide.American patent US-3,249,059 proposes to equip the drive shaft with rings of elastic material. Patches are a potential source of failure. In addition, they do not make it possible to remedy all of the drive faults and their wear is rapid.
Le brevet américain US-5.037.274 propose par ailleurs l'utilisation d'un axe d'entraînement ayant une extrémité supérieure conique.American patent US Pat. No. 5,037,274 also proposes the use of a drive shaft having a conical upper end.
La présente invention remédie aux inconvénients précités en proposant un axe d'entraînement de galets rotatifs, avec lequel on obtient un entraînement sans glissement d'un galet par l'axe.The present invention overcomes the aforementioned drawbacks by proposing a drive axis of rotary rollers, with which a drive is obtained without sliding of a roller by the axis.
Dans la présente invention, l'entraînement est obtenu sans écrasement des galets et avec un couple moteur très faible.In the present invention, the drive is obtained without crushing the rollers and with a very low engine torque.
La présente invention a aussi pour objet le procédé de fabrication d'un tel axe.The present invention also relates to the method of manufacturing such an axis.
La présente invention crée donc un axe d'entraînement d'au moins un galet rotatif, qui est caractérisé en ce que la partie externe dudit axe d'entraînement présente des surfaces traitées par projection de particules pour lui donner une rugosité contrôlée apte à permettre un entraînement sans glissement du galet par rapport à l'axe.The present invention therefore creates a drive axis of at least one rotary roller, which is characterized in that the external part of said drive axis has surfaces treated by projection of particles to give it a controlled roughness capable of allowing a drive without sliding of the roller relative to the axis.
La présente invention a également pour objet un procédé de fabrication d'un axe d'entraînement d'une pompe péristaltique à galets rotatifs à partir d'un axe métallique cylindrique, dans lequel la zone destinée à venir au contact d'un galet rotatif est décolletée, puis rectifiée, afin d'obtenir un état de surface uniforme contrôlé, qui est caractérisé en ce qu'une partie au moins de ladite zone destinée à venir au contact d'un galet est traitée en surface par projection d'une matière pour lui donner une rugosité contrôlée.The present invention also relates to a method of manufacturing a drive shaft of a peristaltic pump with rotary rollers from a cylindrical metal axis, in which the zone intended to come into contact with a rotary roller is turned, then rectified, in order to obtain a uniform, controlled surface condition, which is characterized in that at least part of said zone intended to come into contact with a roller is surface treated by spraying a material for give it a controlled roughness.
La présente invention concerne également les caractéristiques ci-après, considérées isolément ou selon toutes leurs combinaisons techniquement possibles :
- les surfaces traitées sont prévues sur toute la partie externe de l'axe d'entraînement ;
- les surfaces traitées sont réalisées sélectivement sur une ou plusieurs zones de l'axe d'entraînement ;
- seules les parties externes de l'axe d'entraînement destinées à venir au contact avec au moins un galet, sont traitées ;
- le traitement de surface est réalisé par projection de particules solides ;
- le traitement de surface est un grenaillage, dans lequel des billes de verre, des particules de tungstène, de sable, ou analogues, sont projetées sur la surface externe de l'axe d'entraînement ;
- la partie supérieure de l'axe a une forme conique arrondie ;
- le rayon de courbure du cône de l'axe est approximativement égal à la moitié du diamètre de l'axe au niveau des galets ;
- les parties traitées destinées à venir au contact des galets correspondent à la partie supérieure et à la partie inférieure d'un galet, qui produit l'écrasement du tube par sa partie médiane ;
- la partie traitée de l'axe d'entraînement est polie subséquemment.
- the treated surfaces are provided over the entire external part of the drive axis;
- the treated surfaces are produced selectively on one or more zones of the drive axis;
- only the external parts of the drive shaft intended to come into contact with at least one roller, are treated;
- the surface treatment is carried out by projection of solid particles;
- the surface treatment is shot peening, in which glass balls, particles of tungsten, sand, or the like, are projected onto the external surface of the drive axis;
- the upper part of the axis has a rounded conical shape;
- the radius of curvature of the axis cone is approximately equal to half the diameter of the axis at the level of the rollers;
- the treated parts intended to come into contact with the rollers correspond to the upper part and to the lower part of a roller, which produces the crushing of the tube by its middle part;
- the treated part of the drive shaft is subsequently polished.
Divers avantages et caractéristiques de la présente invention ressortiront de la description détaillée ci-après, faite en regard des dessins annexés, dans lesquels :
- la Figure 1 est une vue de dessus d'une partie d'une pompe péristaltique ;
- la Figure 2 est une coupe prise suivant la ligne II-II de la Figure 1 ;
- la Figure 2A est le détail A de la Figure 2 ;
- la Figure 3 est une coupe schématique partielle d'un axe et d'un galet.
- Figure 1 is a top view of part of a peristaltic pump;
- Figure 2 is a section taken on the line II-II in Figure 1;
- Figure 2A is the detail A of Figure 2;
- Figure 3 is a partial schematic section of an axis and a roller.
Comme représenté sur la Figure 1, on a illustré schématiquement et partiellement une pompe péristaltique 4, avec laquelle trois galets 2 sont animés d'un mouvement de rotation par un axe d'entraînement 1 mû par un moteur non représenté.As shown in Figure 1, there is schematically and partially illustrated a peristaltic pump 4, with which three
Comme on peut le constater à partir de la Figure 2, l'axe d'entraînement 1 présente plusieurs zones différentes à sa surface externe venant au contact d'au moins un galet 2 logé dans la pompe péristaltique 4.As can be seen from FIG. 2, the drive axis 1 has several different zones on its external surface coming into contact with at least one
L'axe d'entraînement 1 est solidaire d'un épaulement 12 assurant son maintien dans le corps de pompe péristaltique.The drive axis 1 is integral with a
Le moteur de commande 5 de l'axe d'entraînement 1 est relié à ce dernier par une liaison 13, qui peut affecter toutes formes appropriées.The
La surface externe 6 de l'axe d'entraînement 1, venant au contact d'au moins un galet 2, comprend des surfaces traitées 7, 7' coopérant avec des parties sélectives du galet 2.The external surface 6 of the drive axis 1, coming into contact with at least one
Le mode d'obtention des surfaces traitées 7, 7' sera indiqué ci-après.The method of obtaining the treated surfaces 7, 7 ′ will be indicated below.
La Figure 2A représente le détail A de l'embout supérieur de l'axe d'entraînement 1.Figure 2A shows the detail A of the upper end of the drive shaft 1.
La partie supérieure 8 de l'axe d'entraînement 1 a une forme conique arrondie.The
Le rayon de courbure 9 du cône est sensiblement égal à la moitié du diamètre 10 de l'axe d'entraînement 1 au niveau des galets 2.The radius of curvature 9 of the cone is substantially equal to half the
La Figure 3 montre la coopération entre un exemple d'axe d'entraînement 1 selon la présente invention, et un exemple particulier de galet rotatif ayant une configuration renflée.Figure 3 shows the cooperation between an example of a drive axis 1 according to the present invention, and a particular example of a rotary roller having a bulged configuration.
Dans le mode de mise en oeuvre selon la Figure 3, seules les zones 7, 7' venant en contact avec les parties 15, 16 du galet 2 sont traitées, tandis que les autres parties externes 6 de l'axe d'entraînement 1 ne sont pas traitées.In the embodiment according to Figure 3, only the zones 7, 7 'coming into contact with the
Lors de la rotation du galet 2 par l'axe d'entraînement 1, le tube 3 est comprimé par la partie médiane 11 du galet rotatif 2.During the rotation of the
On décrit à présent le traitement de la surface externe de l'axe d'entraînement 1.The treatment of the external surface of the drive axis 1 is now described.
Le traitement de surface de l'axe d'entraînement 1 des galets 2 est ce qu'il est convenu d'appeler un grenaillage ou billage.The surface treatment of the drive axis 1 of the
Selon ce traitement de grenaillage ou de billage, on projette des particules, généralement des particules solides, sous un certain angle et sous une pression déterminée, afin d'obtenir une rugosité contrôlée des parties sélectives de l'axe d'entraînement ayant reçu les projections de particules solides.According to this shot peening or billing treatment, particles, generally solid particles, are projected at a certain angle and under a determined pressure, in order to obtain a controlled roughness of the selective parts of the drive axis having received the projections. solid particles.
Ces projections de particules solides peuvent être, à titre d'exemple, des projections de billes de verre, de particules de tungstène, de particules de divers matériaux durs comme du diamant. Naturellement, il peut aussi s'agir de diverses particules de sable.These projections of solid particles can be, for example, projections of glass beads, tungsten particles, particles of various hard materials such as diamond. Naturally, it can also be various particles of sand.
Dans un mode de réalisation de la présente invention, l'axe d'entraînement est fabriqué dans les conditions suivantes.In one embodiment of the present invention, the drive shaft is manufactured under the following conditions.
L'axe est réalisé dans un matériau, par exemple de l'acier, inoxydable.The axle is made of a material, for example steel, stainless.
Il est rectifié de manière à lui donner un diamètre précis, par exemple φ = 2,48 ± 0,001 mm.It is adjusted so as to give it a precise diameter, for example φ = 2.48 ± 0.001 mm.
Il est ensuite grenaillé au moins sur des parties sélectives 7, 7'. A cet effet, l'axe est porté par une tête rotative et est soumis aux projections d'une buse orientée, approximativement perpendiculaire à l'axe, et animé d'un mouvement alternatif parallèle à celui-ci. La buse balaie ainsi les parties sélectives 7, 7' de l'axe à grenailler.It is then shot blasted at least on selective parts 7, 7 '. To this end, the axis is carried by a rotary head and is subjected to the projections of an oriented nozzle, approximately perpendicular to the axis, and driven by an alternating movement parallel thereto. The nozzle thus scans the selective parts 7, 7 ′ of the axis to be shot blasted.
Les billes de grenaillage sont des billes de verre ou des cristaux de diamant d'une grosseur moyenne de 65 micromètres.Shot blasting balls are glass balls or diamond crystals with an average size of 65 micrometers.
Le temps de projection a été de 5 secondes, à une distance de 100 mm, sous un angle de tir de 90°.The projection time was 5 seconds, at a distance of 100 mm, at a shooting angle of 90 °.
La pression de la machine projetant l'abrasif était de 2 bars.The pressure of the machine projecting the abrasive was 2 bars.
Dans certains cas, après le traitement sélectif de grenaillage sur une zone étendue, pour obtenir les parties 7, 7' illustrées sur les dessins, on a rectifié à nouveau l'axe d'entraînement 1 dans les parties 14 qui n'ont pas reçu de traitement de grenaillage ou de billage.In some cases, after the selective shot peening treatment over a large area, in order to obtain the parts 7, 7 ′ illustrated in the drawings, the drive axis 1 was again rectified in the
L'axe est alors soumis à un traitement thermique accompagné d'un dépôt de nitrure de titane, par exemple d'une épaisseur égale à 2 micromètres. Ce traitement permet d'augmenter la dureté superficielle de l'axe sans changer son état de surface.The axis is then subjected to a heat treatment accompanied by a deposit of titanium nitride, for example with a thickness equal to 2 micrometers. This treatment makes it possible to increase the surface hardness of the axis without changing its surface condition.
Lors de l'utilisation intensive de l'axe d'entraînement 1 selon la présente invention, ayant des parties sélectives traitées 7, 7' pour avoir une rugosité contrôlée lors du contact avec les parties supérieure 15 et inférieure 16 du galet rotatif 2, on a constaté que le traitement de grenaillage ou de billage, appliqué sur l'axe d'entraînement 1 de la présente invention, assure un bon entraînement du ou des galets 2, sans usure ou abrasion dudit ou desdits galets 2. Il n'y a pas non plus de transfert de particules plastiques sur l'axe, ce qui pourrait conduire à un bouchage des cratères créés par le grenaillage ou billage.During intensive use of the drive shaft 1 according to the present invention, having selective parts treated 7, 7 ′ to have a controlled roughness upon contact with the upper 15 and lower 16 parts of the
L'axe d'entraînement 1 en acier inoxydable avec les parties traitées 7, 7', comme indiqué ci-dessus, avait un diamètre d'environ 2,5 mm, tandis que le diamètre des galets rotatifs 2 était d'environ 12 mm.The drive shaft 1 made of stainless steel with the treated parts 7, 7 ', as indicated above, had a diameter of approximately 2.5 mm, while the diameter of the
La partie de l'axe d'entraînement est polie entièrement avant le billage et, après les opérations de billage, les dimensions de l'axe d'entraînement 1 ne sont pas modifiées, ce qui permet d'obtenir d'excellentes précisions dimensionnelles du diamètre de l'axe d'entraînement 1.The part of the drive shaft is fully polished before billing and, after the billing operations, the dimensions of the drive shaft 1 are not not modified, which allows excellent dimensional accuracy of the diameter of the drive axis 1 to be obtained.
L'invention n'est pas limitée au mode de réalisation représenté et décrit en détail, et diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the embodiment shown and described in detail, and various modifications can be made without departing from its scope.
Les signes de référence, insérés après les caractéristiques techniques mentionnées dans les revendications, ont pour seul but de faciliter la compréhension de ces dernières, et n'en limitent aucunement la portée.The reference signs, inserted after the technical characteristics mentioned in the claims, have the sole purpose of facilitating the understanding of the latter, and in no way limit their scope.
Claims (12)
- A drive shaft (1) for at least one rotating roller (2), characterized in that the external part (6) of said drive shaft (1) has surfaces (7, 7') treated by the projection of particles, to impart a controlled roughness to it, designed to enable slip-free drive of the roller (2) by the shaft (1).
- The drive shaft according to Claim 1, characterized in that the treated surfaces (7, 7') are provided over the entire external portion (6) of the drive shaft (1).
- The drive shaft according to Claim 1, characterized in that the treated surface (7, 7') are made selectively on one or more zones of the drive shaft (1).
- The drive shaft according to Claim 1 or Claim 3, characterized in that only the external parts of the drive shaft (1), intended to come into contact with at least one roller (2), are treated.
- The drive shaft according to any one of Claims 1 to 4, characterized in that the surface treatment is made by the projection of solid particles.
- The drive shaft according to Claim 5, characterized in that the surface treatment is a shot-blasting, in which glass beads, tungsten particles or sand particles are projected;
- The drive shaft according to any one of Claims 1 to 6, characterized in that the upper portion (8) of the shaft (1) has rounded tapered shape.
- The drive shaft according to any one of Claims 1 to 7, characterized in that the radius of curvature (9) of the cone of the shaft (1) is approximately equal to half the diameter (10) of the shaft (1) at the level of the rollers (2).
- The drive shaft according to any one of Claims 1 to 8, characterized in that the treated parts (7, 7') designed to come into contact with the rollers (2) correspond to the upper part (15) and to the lower part (16) of a roller (2), which causes the squeezing of the tube (3) by its median portion (11).
- The drive shaft (1) for at least one rotating roller (2) according to any one of Claims 1 to 9, characterized in that it is applied to peristaltic pump, in which at least one roller (2) compresses a deformable tube (3).
- The process of manufacture according to a drive shaft for a peristaltic pump with rotating rollers from a cylindrical metal shaft, in which the zone intended to come into contact with a rotating roller is cropped, then ground, in order to obtain a controlled uniform surface state, characterized in that at least a portion of said zone intended to come into contact with a roller is surface treated by projection of a material to impart a controlled roughness to it.
- The process to Claim 11, characterized in that the treated portion is subsequently polished.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9205114 | 1992-04-24 | ||
| FR9205114A FR2690484B1 (en) | 1992-04-24 | 1992-04-24 | DRIVE AXIS FOR PERISTALTIC PUMP, AND ITS MANUFACTURING METHOD. |
| PCT/FR1993/000396 WO1993022559A1 (en) | 1992-04-24 | 1993-04-22 | Driving shaft for peristaltique pump and fabrication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0604604A1 EP0604604A1 (en) | 1994-07-06 |
| EP0604604B1 true EP0604604B1 (en) | 1996-09-04 |
Family
ID=9429256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93911815A Expired - Lifetime EP0604604B1 (en) | 1992-04-24 | 1993-04-22 | Driving shaft for peristaltique pump and fabrication method |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0604604B1 (en) |
| JP (1) | JPH06508669A (en) |
| AT (1) | ATE142311T1 (en) |
| AU (1) | AU663793B2 (en) |
| CA (1) | CA2110981A1 (en) |
| DE (1) | DE69304502T2 (en) |
| ES (1) | ES2092308T3 (en) |
| FR (1) | FR2690484B1 (en) |
| WO (1) | WO1993022559A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5688112A (en) * | 1996-02-22 | 1997-11-18 | Garay; Thomas William | Rotor axis aligned tube and outlet for a peristaltic pump system |
| JP5404105B2 (en) * | 2009-03-09 | 2014-01-29 | 株式会社日研工作所 | Clamp mechanism, spanner and tool clamper provided with this clamp mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2899904A (en) * | 1959-08-18 | Roller pump | ||
| US3249059A (en) * | 1964-03-31 | 1966-05-03 | Everpure | Peristaltic-type pump |
| US4906168A (en) * | 1989-02-06 | 1990-03-06 | Thompson Ronald E | Peristaltic pump |
| US5037274A (en) * | 1989-12-05 | 1991-08-06 | Infometrix, Incorporated | Peristaltic apparatus and method for pumping and/or metering fluids |
-
1992
- 1992-04-24 FR FR9205114A patent/FR2690484B1/en not_active Expired - Fee Related
-
1993
- 1993-04-22 ES ES93911815T patent/ES2092308T3/en not_active Expired - Lifetime
- 1993-04-22 JP JP5518986A patent/JPH06508669A/en active Pending
- 1993-04-22 AT AT93911815T patent/ATE142311T1/en not_active IP Right Cessation
- 1993-04-22 CA CA002110981A patent/CA2110981A1/en not_active Abandoned
- 1993-04-22 EP EP93911815A patent/EP0604604B1/en not_active Expired - Lifetime
- 1993-04-22 DE DE69304502T patent/DE69304502T2/en not_active Expired - Fee Related
- 1993-04-22 WO PCT/FR1993/000396 patent/WO1993022559A1/en active IP Right Grant
- 1993-04-22 AU AU42635/93A patent/AU663793B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO1993022559A1 (en) | 1993-11-11 |
| CA2110981A1 (en) | 1993-11-11 |
| DE69304502T2 (en) | 1997-04-03 |
| EP0604604A1 (en) | 1994-07-06 |
| ES2092308T3 (en) | 1996-11-16 |
| ATE142311T1 (en) | 1996-09-15 |
| FR2690484B1 (en) | 1995-07-13 |
| AU663793B2 (en) | 1995-10-19 |
| JPH06508669A (en) | 1994-09-29 |
| DE69304502D1 (en) | 1996-10-10 |
| FR2690484A1 (en) | 1993-10-29 |
| AU4263593A (en) | 1993-11-29 |
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