EP1268070A1 - Liquid sample pipette with tip ejecting mechanism - Google Patents

Liquid sample pipette with tip ejecting mechanism

Info

Publication number
EP1268070A1
EP1268070A1 EP01923762A EP01923762A EP1268070A1 EP 1268070 A1 EP1268070 A1 EP 1268070A1 EP 01923762 A EP01923762 A EP 01923762A EP 01923762 A EP01923762 A EP 01923762A EP 1268070 A1 EP1268070 A1 EP 1268070A1
Authority
EP
European Patent Office
Prior art keywords
pipette
button
arm
longitudinal direction
axis
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.)
Granted
Application number
EP01923762A
Other languages
German (de)
French (fr)
Other versions
EP1268070B1 (en
Inventor
François VIOT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gilson SAS
Original Assignee
Gilson Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gilson Inc filed Critical Gilson Inc
Publication of EP1268070A1 publication Critical patent/EP1268070A1/en
Application granted granted Critical
Publication of EP1268070B1 publication Critical patent/EP1268070B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0275—Interchangeable or disposable dispensing tips
    • B01L3/0279—Interchangeable or disposable dispensing tips co-operating with positive ejection means

Definitions

  • the invention relates to pipettes for taking liquid samples.
  • Document EP-0 566 939 discloses a pipette comprising a body and a movable actuator arm sliding along the body to separate from the pipette a fixed cone with friction in the lower part thereof.
  • the pipette has a voter control button to lower the arm by pressing the button.
  • the button is articulated on the arm and connects to the body of the pipette so that a push down on the button changes its inclination and by leveraging lowers the arm reducing the effort to be provided by the user against of the elector's return spring.
  • the parts of this ejection mechanism are relatively difficult to make and assemble.
  • An object of the invention is to provide a pipette of a different type in which the election mechanism is easier to manufacture and to assemble.
  • a sampling pipette comprising a body, an arm movable relative to the body parallel to a longitudinal direction of the pipette for ejecting a cone fixed to the body and a control button of the movement of the arm, the pipette being arranged so that the button achieves a sliding sliding on the arm during the movement of the arm because of its relation to the body.
  • the connection between the button and the arm is particularly simple. These two parts are therefore easy to manufacture and assemble with respect to this connection.
  • the invention may also have at least any of the following characteristics:
  • the button is mounted movable in rotation relative to the body about an axis perpendicular to the longitudinal direction;
  • the pipette comprises an intermediate piece mounted movable in rotation relative to the body about an axis parallel to the longitudinal direction, the button being mounted movable in rotation relative to the intermediate piece about an axis perpendicular to the longitudinal direction;
  • the intermediate piece is mounted movable in rotation relative to the arm about the axis parallel to the longitudinal direction;
  • the pipette comprises a movable connecting piece relative to the body along an axis parallel to the longitudinal direction, the button being movable relative to this piece through an opening of this piece;
  • the connecting piece is movable in rotation relative to the arm about the axis parallel to the longitudinal directicr; - The connecting piece is movable in rotation relative to the intermediate piece around the axis parallel to the longitudinal direction;
  • the button is movable relative to the body in a plane perpendicular to the longitudinal direction by being able to occupy any position from a continuous range of positions in this plane and by allowing the movement of the arm to be controlled in any position;
  • the button is mounted movable in rotation relative to the body in said plane; - The button is arranged to carry out a sliding support on the arm during the movement of the button in said plane;
  • the pipette comprises means for locating at least one predetermined position of the button with respect to the body from among said range;
  • the pipette is a hand pipette
  • FIG. 1 is a partial view in vertical axial section of the upper part of a pipette according
  • FIG. 3 is an exploded perspective view of the upper part of the pipette elector mechanism of Figure 1;
  • Figures 4 and 5 are two views similar to Figure 1 respectively showing the high and low positions of the ejector
  • FIG. 6 is a vertical axial sectional view along the plane VI-VI of the pipette of Figure 4;
  • Figure 7 is a view similar to Figure 6 showing the ejector in the low position
  • - Figure 8 is a top view of the pipette of Figure 1;
  • - Figure 9 is a horizontal sectional view along the plane IX-IX of the pipette of Figure 4;
  • FIG. 10 is a partial view of the pipette similar to Figure 8 showing the angular displacement of the voter button in a horizontal plane;
  • Figures 11 and 12 are two views similar to Figure 10 illustrating two extreme left and right positions of the button.
  • the pipette according to the embodiment illustrated in FIG. 1 is a single-channel sampling pipette, many aspects of which are known in themselves and will not be described here in detail.
  • the pipette comprises a rod 4 with an axis 10 surmounted by a sampling control button 6, controlling the sliding movement of a piston along the axis 10 in a lower cavity of the pipette for suction of a liquid sample in this cavity or its expulsion from it
  • the lower tip of the pipette is capable of receiving a frictionally disposable cone through which the withdrawn liquid passes.
  • the pipette includes means for adjusting the volume to be sampled, which can be of a conventional type.
  • the pipette has an ejector mechanism allowing the tip to be pushed in the longitudinal direction downwards, to separate it from the pipette.
  • the lower part of this mechanism is known per se. We will only describe its upper part.
  • the mechanism comprises an upper cover 12, an ejector control button 14, a pivot cover 16, a spring 18 and an actuator 20.
  • the upper cover 12 has a cylindrical lateral face 22 and an upper planar circular face 24.
  • the upper face is surmounted in its center by a finger 26 received in an orifice in the body 2 and held in place by a washer. Thanks to this finger, the cover 12 is movable in rotation relative to the body 2 about a vertical axis 28 parallel to the axis 10, and fixed to slide relative to the body.
  • the button 14 comprises a flattened actuation part 30, a leg 32 extending laterally parallel to the actuation part and a shaft 34 perpendicular to the leg and emerging from each side thereof. The shaft is received in rotation in the upper cover 12.
  • the button is thus articulated to the cover around a horizontal axis 36 perpendicular to the vertical axes 10 and 28 and intersecting with the axis 28.
  • the wall side 22 of the cover has a notch 37 in which the leg 32 of the button extends when it is in a horizontal position.
  • the hood is open down.
  • the pivot cover 16 comprises a cylindrical wall 38 open upwards and a planar circular lower wall 40 projecting from which extends a finger 42 downwards.
  • the cover 12 extends in the pivot cover 16 with their faces side 22 and 38 opposite.
  • the wall 38 has a notch 39 over its entire height placed in coincidence with the notch 37 of the cover, and crossed by the leg 32.
  • the pivot cover 16 is movable to slide relative to the cover 12 along the axis 28.
  • L 'actuator 20 has in the upper part a flat wall 44 indented from its front edge to its center. This notch receives the finger 42 extending at the center of the wall 44. The lower end of the finger is widened to block the translation of the pivot cover 16 relative to the actuator 20 along the axis 28. The pivot cover 16 is therefore movable in rotation relative to the actuator about the axis 28. It bears downwards on the wall 44 of the actuator.
  • the actuator 20 has a U-shaped flange 46 extending at the edge of the wall 44, behind, to the left and to the right of the latter, and projecting upwards relative to the wall 44. the flange has notches 48, for example three in number as illustrated, or five, starting the flange down. One of the notches is etered in the middle at the back. The other two extend respectively to the left and to the right of the wall 44.
  • the leg 32 is supported on the flange 46 and can penetrate one of the notches 48.
  • the spring 18 is housed in the actuator 20, as illustrated in FIGS. 4 to 7. It bears by its lower end on the body 2 and by its upper end under the wall 44 to urge the actuator upwards.
  • the actuator 20 is movable by sliding in the body 2 along the axis 28. It is rigidly connected to a lower rod, not shown, intended to contact the cone to be ejected.
  • the button 14 is movable in rotation relative to the body 2 around the axis 28, that is to say in a horizontal plane perpendicular to the axis 28. It can move on either side of its rear middle position by 80 ° on each side.
  • the left and right ends of these deflections, illustrated in FIGS. 11 and 12, correspond to the reception of the branch 32 in the lateral notches 48.
  • the button 14, the upper cover 12 and the pivot cover 16 move in one piece in rotation about the axis 28.
  • the actuator 20 remains fixed.
  • the button can be placed in any position among the 160 ° travel range, outside or in the notches.
  • the button can be actuated downwards by the user on the part 30.
  • This action causes the button to rotate around the horizontal axis 36, this which causes the vertical sliding along the axis 28 of the pivot cover 16 and of the actuator 20.
  • the leg 32 presses on the same point of the flange 46 by sliding on it in a radial plar has the axis 28.
  • the upper cover 12 remains stationary. Lowering the actuator allows the cone to be ejected. Consequently, the cone can be ejected whatever the position of the button around the axis 28, in particular with the button on the left, on the right or behind the pipette.
  • the two movements which have just been described can be combined at leisure when the button is moved.
  • the user can freely choose the position of the button at rest and its position during the ejection movement of a cone.
  • this mechanism provides great freedom of movement and positioning of the button while being of a relatively simple constitution It is easy to manufacture and assemble.
  • the button acts as a lever reducing the effort to be provided for ejecting the cone .
  • the notches 48 constitute means for locating preferred positions of the button on the collar (here rear, left and right).

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

The invention concerns a pipette comprising a body (2), an arm (20) mobile relative to the body parallel to a longitudinal direction (10) of the pipette to eject a tip fixed to the body and a push button controlling (14) the movement of the arm. The pipette is arranged so that the push button (14) produces a sliding pressure on the arm (20) during the movement of the arm relative to the body.

Description

«Pipet te de prél èvemen t d' échan t i l l ons l i quides a mécanisme d ' ej ecteur de cône » "Pipette for sample sampling in the liquid with cone ejector mechanism"
L' invention concerne les pipettes de prélèvement d'échantillons liquides.The invention relates to pipettes for taking liquid samples.
On connaît d'après le document EP-0 566 939 une pipette comportant un corps et un bras d'e]ecteur mobile a coulissement le long du corps pour séparer de la pipette un cône fixe a friction en partie inférieure de celle-ci. La pipette comporte un bouton de commande d'électeur permettant d'abaisser le bras par une pression sur le bouton.Document EP-0 566 939 discloses a pipette comprising a body and a movable actuator arm sliding along the body to separate from the pipette a fixed cone with friction in the lower part thereof. The pipette has a voter control button to lower the arm by pressing the button.
Le bouton est articule au bras et relie au corps de la pipette de sorte qu'une poussée vers le bas sur le bouton modifie son inclinaison et par effet de levier abaisse le bras en réduisant l'effort a fournir par l'utilisateur a l' encontre du ressort de rappel de l'électeur. Toutefois, les pièces de ce mécanisme d'éjection sont relativement difficiles a réaliser et a assembler .The button is articulated on the arm and connects to the body of the pipette so that a push down on the button changes its inclination and by leveraging lowers the arm reducing the effort to be provided by the user against of the elector's return spring. However, the parts of this ejection mechanism are relatively difficult to make and assemble.
Un but de l'invention est de fournir une pipette d'un type différent dans laquelle le mécanisme d'élection est plus facile a fabriquer et a assemblerAn object of the invention is to provide a pipette of a different type in which the election mechanism is easier to manufacture and to assemble.
En vue de la réalisation de ce but, on prévoit selon l'invention une pipette de prélèvement comportant un corps, un bras mobile par rapport au corps parallèlement a une direction longitudinale dp la pipette pour éjecter un cône fixe au corps et un bouton de commande du mouvement du bras, la pipette étant agencée de sorte que le bouton réalise un aπoui glissant sur le bras au cours du mouvement du bras car rapport au corps. Ainsi, la liaison entre le bouton et le bras est particulièrement simple. Ces deux pièces sont donc faciles à fabriquer et à assembler à l'égard de cette liaison . L'invention pourra en outre présenter au moins l'une quelconque des caractéristiques suivantes :In order to achieve this goal, there is provided according to the invention a sampling pipette comprising a body, an arm movable relative to the body parallel to a longitudinal direction of the pipette for ejecting a cone fixed to the body and a control button of the movement of the arm, the pipette being arranged so that the button achieves a sliding sliding on the arm during the movement of the arm because of its relation to the body. Thus, the connection between the button and the arm is particularly simple. These two parts are therefore easy to manufacture and assemble with respect to this connection. The invention may also have at least any of the following characteristics:
- le bouton est monté mobile à rotation par rapport au corps autour d'un axe perpendiculaire à la direction longitudinale ; - la pipette comprend une pièce intermédiaire montée mobile à rotation par rapport au corps autour d' un axe parallèle à la direction longitudinale, le bouton étant monté mobile à rotation par rapport a la pièce intermédiaire autour d'un axe perpendiculaire a la direction longitudinale ;- The button is mounted movable in rotation relative to the body about an axis perpendicular to the longitudinal direction; - The pipette comprises an intermediate piece mounted movable in rotation relative to the body about an axis parallel to the longitudinal direction, the button being mounted movable in rotation relative to the intermediate piece about an axis perpendicular to the longitudinal direction;
- le bouton est directement relie a la pièce intermédiaire ;- the button is directly connected to the intermediate piece;
- la pièce intermédiaire est montée mobile a rotation par rapport au bras autour de l'axe parallèle a la direction longitudinale ;- The intermediate piece is mounted movable in rotation relative to the arm about the axis parallel to the longitudinal direction;
- la pièce intermédiaire est directement reliée au corps ;- the intermediate piece is directly connected to the body;
- la pipette comprend une pièce de liaison mobile par rapport au corps suivant un axe parallèle a la direction longitudinale, le bouton étant mobile par rapport à cette pièce à travers une ouverture de cette pièce ;- The pipette comprises a movable connecting piece relative to the body along an axis parallel to the longitudinal direction, the button being movable relative to this piece through an opening of this piece;
- la pièce de liaison est mobile a rotation par rapport au bras autour de l'axe parallèle a la directicr longitudinale ; - la pièce de liaison est mobile à rotation par rapport à la pièce intermédiaire autour de l'axe parallèle à la direction longitudinale ;- The connecting piece is movable in rotation relative to the arm about the axis parallel to the longitudinal directicr; - The connecting piece is movable in rotation relative to the intermediate piece around the axis parallel to the longitudinal direction;
- la pièce de liaison est directement reliée à la pièce intermédiaire ;- the connecting piece is directly connected to the intermediate piece;
- la pièce de liaison est directement reliée au bras ;- the connecting piece is directly connected to the arm;
- le bouton est mobile par rapport au corps dans un plan perpendiculaire à la direction longitudinale en pouvant occuper une position quelconque parmi une plage continue de positions dans ce plan et en permettant de commander le mouvement du bras dans une position quelconque ;- The button is movable relative to the body in a plane perpendicular to the longitudinal direction by being able to occupy any position from a continuous range of positions in this plane and by allowing the movement of the arm to be controlled in any position;
- le bouton est monté mobile à rotation par rapport au corps dans ledit plan ; - le bouton est agencé pour réaliser un appui glissant sur le bras au cours du mouvement du bouton dans ledit plan ;- The button is mounted movable in rotation relative to the body in said plane; - The button is arranged to carry out a sliding support on the arm during the movement of the button in said plane;
- la pipette comprend des moyens de repérage d'au moins une position prédéterminée du bouton par rapport au corps parmi ladite plage ;- The pipette comprises means for locating at least one predetermined position of the button with respect to the body from among said range;
- la pipette est une pipette à main ;- the pipette is a hand pipette;
- la pipette est à canal unique ; et- the pipette is single channel; and
- la pipette a une forme allongée suivant la direction longitudinale . D'autres caractéristiques et avantages de l'invention apparaîtront encore dans la description suivante d'un mode préféré de réalisation donne a titre d'exemple non limitatif. Aux dessins annexés :- The pipette has an elongated shape in the longitudinal direction. Other characteristics and advantages of the invention will become apparent in the following description of a preferred embodiment given by way of non-limiting example. In the accompanying drawings:
- la figure 1 est une vue partielle en coupe axiaie verticale de la partie supérieure d'une pipette selon- Figure 1 is a partial view in vertical axial section of the upper part of a pipette according
1 ' invention ; - la figure 2 est une vue partielle de droite de la pipette de la figure 1 ;The invention; - Figure 2 is a partial right view of the pipette of Figure 1;
- la figure 3 est une vue éclatée en perspective de la partie supérieure du mécanisme d' électeur de la pipette de la figure 1 ;- Figure 3 is an exploded perspective view of the upper part of the pipette elector mechanism of Figure 1;
- les figures 4 et 5 sont deux vues analogues à la figure 1 montrant respectivement les positions haute et basse de l'éjecteur ;- Figures 4 and 5 are two views similar to Figure 1 respectively showing the high and low positions of the ejector;
- la figure 6 est une vue en coupe axiale verticale suivant le plan VI-VI de la pipette de la figure 4 ;- Figure 6 is a vertical axial sectional view along the plane VI-VI of the pipette of Figure 4;
- la figure 7 est une vue analogue à la figure 6 montrant l'éjecteur en position basse ;- Figure 7 is a view similar to Figure 6 showing the ejector in the low position;
- la figure 8 est une vue de dessus de la pipette de la figure 1 ; - la figure 9 est une vue en coupe horizontale suivant le plan IX-IX de la pipette de la figure 4 ;- Figure 8 is a top view of the pipette of Figure 1; - Figure 9 is a horizontal sectional view along the plane IX-IX of the pipette of Figure 4;
- la figure 10 est une vue partielle de la pipette analogue à la figure 8 montrant le débattement angulaire du bouton d' électeur dans un plan horizontal ; et- Figure 10 is a partial view of the pipette similar to Figure 8 showing the angular displacement of the voter button in a horizontal plane; and
- les figures 11 et 12 sont deux vues analogues à la figure 10 illustrant deux positions extrêmes gauche et droite du bouton.- Figures 11 and 12 are two views similar to Figure 10 illustrating two extreme left and right positions of the button.
La pipette selon le mode de réalisation illustre a la figure 1 est une pipette de prélèvement a canal unique dont de nombreux aspects sont connus en eux- mêmes et ne seront pas décrits ici er détail. Notamment, la pipette comporte une tige 4 d'axe 10 surmontée d'un bouton de commande de prélèvement 6, commandant le mouvement de coulissement d'un piston suivant l'axe 10 dans une cavité inférieure de la pipette pour l'aspiration d'un échantillon de liquide dans cette cavité ou son expulsion hors de celle-ciThe pipette according to the embodiment illustrated in FIG. 1 is a single-channel sampling pipette, many aspects of which are known in themselves and will not be described here in detail. In particular, the pipette comprises a rod 4 with an axis 10 surmounted by a sampling control button 6, controlling the sliding movement of a piston along the axis 10 in a lower cavity of the pipette for suction of a liquid sample in this cavity or its expulsion from it
La pointe inférieure de la pipette est apte a recevoir fixé a friction un cône jetable a travers lequel le liquide prélevé transite. La pipette comporte des moyens de réglage du volume a prélever, qui peuvent être d'un type classique.The lower tip of the pipette is capable of receiving a frictionally disposable cone through which the withdrawn liquid passes. The pipette includes means for adjusting the volume to be sampled, which can be of a conventional type.
La pipette comporte un mécanisme d'ejecteur permettant de pousser le cône suivant la direction longitudinale vers le bas, pour le séparer de la pipette. La partie inférieure de ce mécanisme est connue en soi. On ne décrira que sa partie supérieure.The pipette has an ejector mechanism allowing the tip to be pushed in the longitudinal direction downwards, to separate it from the pipette. The lower part of this mechanism is known per se. We will only describe its upper part.
En référence notamment a la figure 3, le mécanisme comporte un capot supérieur 12, un bouton de commande d'ejecteur 14, un cache-pivot 16, un ressort 18 et un actionneur 20.With particular reference to FIG. 3, the mechanism comprises an upper cover 12, an ejector control button 14, a pivot cover 16, a spring 18 and an actuator 20.
Le capot supérieur 12 comporte une face latérale cylindrique 22 et une face circulaire plane supérieure 24. La face supérieure est surmontée en son centre par un doigt 26 reçu dans un orifice du corps 2 et maintenu en place par une rondelle. Grâce a ce doigt, le capot 12 est mobile a rotation par rapport au corps 2 autour d'un axe vertical 28 parallèle a l'axe 10, et fixe a coulissement par rapport au corps. Le bouton 14 comporte une partie d' act îonnement aplatie 30, une jambe 32 s' étendant latéralement- parallèle a la partie d' actionnement et un arbre 34 perpendiculaire à la jambe et émergeant de chaque cote de celle-ci. L'arbre est reçu a rotation dans le capot supérieur 12. Le bouton est ainsi articule au capot autour d'un axe horizontal 36 perpendiculaire aux ctxes verticaux 10 et 28 et sécant avec l'axe 28. La paroi latérale 22 du capot présente une echancrure 37 dans laquelle s'étend la jambe 32 du bouton lorsqu'elle est en position horizontale. Le capot est ouvert vers le bas . Le cache-pivot 16 comprend une paroi cylindrique 38 ouverte vers le haut et une paroi inférieure plane circulaire 40 en saillie de laquelle s'étend vers ie bas un doigt 42. Le capot 12 s'étend dans le cache- pivot 16 avec leurs faces latérales 22 et 38 en regard. La paroi 38 présente une echancrure 39 sur toute sa hauteur placée en coïncidence avec l' echancrure 37 du capot, et traversée par la jambe 32. Le cache-pivot 16 est mobile à coulissement par rapport au capot 12 suivant l'axe 28. L' actionneur 20 présente en partie supérieure une paroi plane 44 échancrée depuis son bord avant jusqu'à son centre. Cette echancrure reçoit le doigt 42 s' étendant au centre de la paroi 44. L'extrémité inférieure du doigt est élargie pour bloquer la translation du cache-pivot 16 par rapport a 1' actionneur 20 suivant l'axe 28. Le cache-pivot 16 est donc mobile a rotation par rapport a l' actionneur autour de l'axe 28. Il est en appui vers le bas sui la paroi 44 de l' actionneur . L'actionneur 20 présente une collerette 46 en « U » s' étendant au bord de la paroi 44, en arrière, à gauche et a droite de celle-ci, et en saillie vers le haut par rapport a la paroi 44. la collerette comporte des encoches 48, par exemple au nombre de trois tel qu'illustre, ou de cinq, entamant la collerette vers le bas. L'une des encoches s'eterd au milieu à l'arriére. Les deux autres s'étendent respectivement a gauche et a droite de la paroi 44. La jambe 32 est en appui sur la collerette 46 et peut pénétrer dans l'une des encoches 48.The upper cover 12 has a cylindrical lateral face 22 and an upper planar circular face 24. The upper face is surmounted in its center by a finger 26 received in an orifice in the body 2 and held in place by a washer. Thanks to this finger, the cover 12 is movable in rotation relative to the body 2 about a vertical axis 28 parallel to the axis 10, and fixed to slide relative to the body. The button 14 comprises a flattened actuation part 30, a leg 32 extending laterally parallel to the actuation part and a shaft 34 perpendicular to the leg and emerging from each side thereof. The shaft is received in rotation in the upper cover 12. The button is thus articulated to the cover around a horizontal axis 36 perpendicular to the vertical axes 10 and 28 and intersecting with the axis 28. The wall side 22 of the cover has a notch 37 in which the leg 32 of the button extends when it is in a horizontal position. The hood is open down. The pivot cover 16 comprises a cylindrical wall 38 open upwards and a planar circular lower wall 40 projecting from which extends a finger 42 downwards. The cover 12 extends in the pivot cover 16 with their faces side 22 and 38 opposite. The wall 38 has a notch 39 over its entire height placed in coincidence with the notch 37 of the cover, and crossed by the leg 32. The pivot cover 16 is movable to slide relative to the cover 12 along the axis 28. L 'actuator 20 has in the upper part a flat wall 44 indented from its front edge to its center. This notch receives the finger 42 extending at the center of the wall 44. The lower end of the finger is widened to block the translation of the pivot cover 16 relative to the actuator 20 along the axis 28. The pivot cover 16 is therefore movable in rotation relative to the actuator about the axis 28. It bears downwards on the wall 44 of the actuator. The actuator 20 has a U-shaped flange 46 extending at the edge of the wall 44, behind, to the left and to the right of the latter, and projecting upwards relative to the wall 44. the flange has notches 48, for example three in number as illustrated, or five, starting the flange down. One of the notches is etered in the middle at the back. The other two extend respectively to the left and to the right of the wall 44. The leg 32 is supported on the flange 46 and can penetrate one of the notches 48.
Le ressort 18 est logé dans l'actionneur 20, comme illustré aux figures 4 à 7. Il prend appui par son extrémité inférieure sur le corps 2 et par son extrémité supérieure sous la paroi 44 pour solliciter l'actionneur vers le haut. L'actionneur 20 est mobile à coulissement dans le corps 2 suivant l'axe 28. Il est relié de façon rigide à une tige inférieure non illustrée destinée à contacter le cône à éjecter.The spring 18 is housed in the actuator 20, as illustrated in FIGS. 4 to 7. It bears by its lower end on the body 2 and by its upper end under the wall 44 to urge the actuator upwards. The actuator 20 is movable by sliding in the body 2 along the axis 28. It is rigidly connected to a lower rod, not shown, intended to contact the cone to be ejected.
Grâce à la structure qui vient d'être décrite, deux séries de mouvements sont possibles.Thanks to the structure which has just been described, two series of movements are possible.
Tout d'abord, en référence aux figures 10 à 12, le bouton 14 est mobile à rotation par rapport au corps 2 autour de l'axe 28, c'est-à-dire dans un plan horizontal perpendiculaire à l'axe 28. Il peut se déplacer de part et d'autre de sa position médiane arrière sur 80° de chaque côté. Les extrémités gauche et droite de ces débattements, illustrées aux figures 11 et 12, correspondent à la réception de la branche 32 dans les encoches 48 latérales. Au cours de ce mouvement de rotation, le bouton 14, le capot supérieur 12 et le cache-pivot 16 se déplacent d'un seul bloc en rotation autour de l'axe 28. L'actionneur 20 reste fixe. Le bouton peut être place dans une position quelconque parmi la plage de débattement de 160°, en dehors des encoches ou dans celles-ci.First of all, with reference to FIGS. 10 to 12, the button 14 is movable in rotation relative to the body 2 around the axis 28, that is to say in a horizontal plane perpendicular to the axis 28. It can move on either side of its rear middle position by 80 ° on each side. The left and right ends of these deflections, illustrated in FIGS. 11 and 12, correspond to the reception of the branch 32 in the lateral notches 48. During this rotational movement, the button 14, the upper cover 12 and the pivot cover 16 move in one piece in rotation about the axis 28. The actuator 20 remains fixed. The button can be placed in any position among the 160 ° travel range, outside or in the notches.
Par ailleurs, à partir de n'importe quelle position du bouton 14 par rapport au corps 2 autour de l'axe 28, le bouton peut être actionne vers le bas par l'utilisateur sur la partie 30. Cette action entraîne le bouton à rotation autour de l'axe horizontal 36, ce qui provoque le coulissement vertical suivant l'axe 28 du cache-pivot 16 et de l'actionneur 20. Au cours de ce mouvement, la jambe 32 appuie sur un même point de la collerette 46 en glissant sur celle-ci dans un plar radial a l'axe 28. Le capot supérieur 12 reste immobile. La descente de l'actionneur permet l' éjection du cône. Par conséquent, le cône peut être éjecte quelle que soit la position du bouton autour de l'axe 28, notamment avec le bouton a gauche, a droite ou en arrière de la pipette.Furthermore, from any position of the button 14 relative to the body 2 around the axis 28, the button can be actuated downwards by the user on the part 30. This action causes the button to rotate around the horizontal axis 36, this which causes the vertical sliding along the axis 28 of the pivot cover 16 and of the actuator 20. During this movement, the leg 32 presses on the same point of the flange 46 by sliding on it in a radial plar has the axis 28. The upper cover 12 remains stationary. Lowering the actuator allows the cone to be ejected. Consequently, the cone can be ejected whatever the position of the button around the axis 28, in particular with the button on the left, on the right or behind the pipette.
En pratique, les deux mouvements qui viennent d'être décrits peuvent être combines a loisir lors du déplacement du bouton. L'utilisateur peut librement choisir la position du bouton au repos et sa position au cours du mouvement d' éjection d'un cône.In practice, the two movements which have just been described can be combined at leisure when the button is moved. The user can freely choose the position of the button at rest and its position during the ejection movement of a cone.
On voit que ce mécanisme procure une grande liberté de mouvement et de positionnement du bouton tout en étant d'une constitution relativement simple Il est facile a fabriquer et a assembler. En outre, puisque le point d'appui glissant du bouton 14 sur l'actionneur 20 s'étend entre la partie 30 d' actionnement et l'arbre 34, le bouton fait office de levier réduisant l'effort a fournir pour éjecter le cône . Les encoches 48 constituent des moyens de repérage de positions préfères du bouton sur la collerette (ici arrière, gauche et droite).We see that this mechanism provides great freedom of movement and positioning of the button while being of a relatively simple constitution It is easy to manufacture and assemble. In addition, since the sliding support point of the button 14 on the actuator 20 extends between the actuating part 30 and the shaft 34, the button acts as a lever reducing the effort to be provided for ejecting the cone . The notches 48 constitute means for locating preferred positions of the button on the collar (here rear, left and right).
On pourra mettre en œuvre les caractéristiques relatives a l'appui glissant du bouton sur 1 ' act îonneu1- au cours de l' éjection, indépendamment de celles relatives a la mobilité du bouton par rapport au corps dans un plan perpendiculaire a la direction 10 We can implement the characteristics relating to the sliding support of the button on the act îonneu 1 - during ejection, independently of those relating to the mobility of the button relative to the body in a plane perpendicular to the direction 10

Claims

REVENDICATIONS
1. Pipette de prélèvement comportant :1. Sampling pipette comprising:
- un corps (2) ; - un bras (20) mobile par rapport au corps parallèlement a une direction longitudinale (10) de la pipette pour éjecter un cône fixe au corps ; et- a body (2); - an arm (20) movable relative to the body parallel to a longitudinal direction (10) of the pipette for ejecting a fixed cone to the body; and
- un bouton de commande (14) du mouvement du bras, caractérisée en ce qu'elle est agencée de sorte que le bouton (14) réalise un appui glissant sur le bras (20) au cours du mouvement du bras par rapport au corps.- A control button (14) of the movement of the arm, characterized in that it is arranged so that the button (14) provides a sliding support on the arm (20) during the movement of the arm relative to the body.
2. Pipette selon la revendication 1, caractérisée en ce que le bouton (14) est monte mobile a rotation par rapport au corps (2) autour d'un axe (36) perpendiculaire a la direction longitudinale (10) .2. Pipette according to claim 1, characterized in that the button (14) is mounted movable in rotation relative to the body (2) about an axis (36) perpendicular to the longitudinal direction (10).
3. Pipette selon la revendication 1 ou 2, caractérisée en ce qu'elle comprend une pièce intermédiaire (12) montée mobile a rotation par rapport au corps (2) autour d'un axe (28) parallèle a la direction longitudinale (10), le bouton (14; étant monte mobile a rotation par rapport a la pièce intermédiaire (12) autour d'un axe (36) perpendiculaire a la direction longitudinale (10).3. Pipette according to claim 1 or 2, characterized in that it comprises an intermediate piece (12) mounted movable in rotation relative to the body (2) about an axis (28) parallel to the longitudinal direction (10) , the button (14; being mounted movable in rotation relative to the intermediate piece (12) about an axis (36) perpendicular to the longitudinal direction (10).
4. Pipette selon la revendication 3, caractérisée en ce que le bouton (14) est directement relie a la pièce intermédiaire (12) .4. Pipette according to claim 3, characterized in that the button (14) is directly connected to the intermediate piece (12).
5. Pipette selon la revendication 3 ou 4, caractérisée en ce que la pièce intermédiaire (12 est montée mobile a rotation par rapport au bras (20) autour de l'axe (28) parallèle a la directior longitudinale (10). 5. Pipette according to claim 3 or 4, characterized in that the intermediate piece (12 is mounted movable in rotation relative to the arm (20) around the axis (28) parallel to the longitudinal direction (10).
6. Pipette selon l'une quelconque des revendications 3 à 5, caractérisée en ce que la pièce intermédiaire (12) est directement reliée au corps (2) .6. Pipette according to any one of claims 3 to 5, characterized in that the intermediate piece (12) is directly connected to the body (2).
7. Pipette selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comprend une pièce de liaison (16) mobile par rapport au corps (2) suivant un axe (28) parallèle à la direction longitudinale (10), le bouton (14) étant mobile par rapport à cette pièce à travers une ouverture (39) de cette pièce.7. Pipette according to any one of claims 1 to 6, characterized in that it comprises a connecting piece (16) movable relative to the body (2) along an axis (28) parallel to the longitudinal direction (10) , the button (14) being movable relative to this part through an opening (39) of this part.
8. Pipette selon la revendication 7, caractérisée en ce que la pièce de liaison (16) est mobile à rotation par rapport au bras (20) autour de l'axe (28> parallèle à la direction longitudinale (10). 8. Pipette according to claim 7, characterized in that the connecting piece (16) is rotatable with respect to the arm (20) around the axis (28> parallel to the longitudinal direction (10).
9. Pipette selon l'une quelconque des revendications 3 à 6 et selon la revendication 7 ou 8, caractérisée en ce que la pièce de liaison (16) est mobile à rotation par rapport à la pièce intermédiaire9. Pipette according to any one of claims 3 to 6 and according to claim 7 or 8, characterized in that the connecting piece (16) is movable in rotation relative to the intermediate piece
(12) autour de l'axe (28) parallèle à la direction longitudinale (10).(12) around the axis (28) parallel to the longitudinal direction (10).
10. Pipette selon la revendication 9, caractérisée en ce que la pièce de liaison (16) est directement reliée à la pièce intermédiaire (12) .10. Pipette according to claim 9, characterized in that the connecting piece (16) is directly connected to the intermediate piece (12).
11. Pipette selon l'une quelconque des revendications 7 à 10, caractérisée en ce que la pièce de liaison (16) est directement reliée au bras (20) .11. Pipette according to any one of claims 7 to 10, characterized in that the connecting piece (16) is directly connected to the arm (20).
12. Pipette selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le bouton (14) est mobile par rapport au corps (2) dans un plan perpendiculaire à la direction longitudinale (10) en pouvant occuper une position quelconque parmi une plage continue de positions dans ce plan et en permettant de commander le mouvement du bras (20) dans une position quelconque .12. Pipette according to any one of claims 1 to 11, characterized in that the button (14) is movable relative to the body (2) in a plane perpendicular to the longitudinal direction (10) being able to occupy any position among a continuous range of positions in this plane and allowing control the movement of the arm (20) in any position.
13. Pipette selon la revendication 12, caractérisée en ce que le bouton (14) est monte mobile à rotation par rapport au corps (2) dans ledit plan.13. Pipette according to claim 12, characterized in that the button (14) is mounted movable in rotation relative to the body (2) in said plane.
14. Pipette selon l'une des revendications 12 a 13, caractérisée en ce que le bouton (14) est agence pour réaliser un appui glissant sur le bras (20) au cours du mouvement du bouton dans ledit plan. 14. Pipette according to one of claims 12 to 13, characterized in that the button (14) is arranged to produce a sliding support on the arm (20) during the movement of the button in said plane.
15. Pipette selon l'une quelconque des revendications 12 à 14, caractérisée en ce qu'elle comprend des moyens de repérage (48) d'au moins une position prédéterminée du bouton (14) par rapport au corps (2) parmi ladite plage. 15. Pipette according to any one of claims 12 to 14, characterized in that it comprises locating means (48) of at least one predetermined position of the button (14) relative to the body (2) among said range .
16. Pipette selon l'une quelconque des revendications 1 à 15, caractérisée en ce que la pipette est une pipette à main.16. Pipette according to any one of claims 1 to 15, characterized in that the pipette is a hand pipette.
17. Pipette selon l'une quelconque des revendications 1 a 16, caractérisée en ce que la pipette est a canal unique.17. Pipette according to any one of claims 1 to 16, characterized in that the pipette is a single channel.
18. Pipette selon l'une quelconque des revendications 1 à 17, caractérisée en ce que la pipette a une forme allongée suivant la direction longitudinale. 18. Pipette according to any one of claims 1 to 17, characterized in that the pipette has an elongated shape in the longitudinal direction.
EP01923762A 2000-04-07 2001-04-09 Liquid sample pipette with tip ejecting mechanism Expired - Lifetime EP1268070B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0004469A FR2807340B1 (en) 2000-04-07 2000-04-07 PIPETTE FOR TAKING LIQUID SAMPLES WITH CONE EJECTOR MECHANISM
FR0004469 2000-04-07
PCT/FR2001/001072 WO2001076752A1 (en) 2000-04-07 2001-04-09 Liquid sample pipette with tip ejecting mechanism

Publications (2)

Publication Number Publication Date
EP1268070A1 true EP1268070A1 (en) 2003-01-02
EP1268070B1 EP1268070B1 (en) 2003-11-26

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ID=8848991

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EP01923762A Expired - Lifetime EP1268070B1 (en) 2000-04-07 2001-04-09 Liquid sample pipette with tip ejecting mechanism

Country Status (16)

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US (1) US6994828B2 (en)
EP (1) EP1268070B1 (en)
JP (1) JP5629419B2 (en)
KR (1) KR100687589B1 (en)
CN (1) CN1212894C (en)
AT (1) ATE254964T1 (en)
AU (2) AU5045501A (en)
CA (1) CA2404783C (en)
DE (1) DE60101322T2 (en)
DK (1) DK1268070T3 (en)
ES (1) ES2210147T3 (en)
FR (1) FR2807340B1 (en)
MX (1) MXPA02009876A (en)
PT (1) PT1268070E (en)
RU (1) RU2259881C2 (en)
WO (1) WO2001076752A1 (en)

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US6997067B2 (en) 2000-04-07 2006-02-14 Gilson S.A.S. Liquid sample pipette with detachable ejector
US7264779B2 (en) 2000-04-07 2007-09-04 Gilson S.A.S. Pipette with tip ejector

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Also Published As

Publication number Publication date
CA2404783A1 (en) 2001-10-18
DE60101322D1 (en) 2004-01-08
RU2259881C2 (en) 2005-09-10
US6994828B2 (en) 2006-02-07
CN1422184A (en) 2003-06-04
AU2001250455C1 (en) 2005-07-14
CN1212894C (en) 2005-08-03
FR2807340B1 (en) 2002-12-06
MXPA02009876A (en) 2004-05-05
JP2003530211A (en) 2003-10-14
JP5629419B2 (en) 2014-11-19
DK1268070T3 (en) 2004-04-05
KR20020087952A (en) 2002-11-23
PT1268070E (en) 2004-03-31
ATE254964T1 (en) 2003-12-15
DE60101322T2 (en) 2004-08-19
US20030147781A1 (en) 2003-08-07
WO2001076752A1 (en) 2001-10-18
KR100687589B1 (en) 2007-02-28
CA2404783C (en) 2009-07-28
AU2001250455B2 (en) 2005-01-27
AU5045501A (en) 2001-10-23
FR2807340A1 (en) 2001-10-12
ES2210147T3 (en) 2004-07-01
EP1268070B1 (en) 2003-11-26

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