EP1268071B1 - Pipette de prelevement a ejecteur de cone - Google Patents

Pipette de prelevement a ejecteur de cone Download PDF

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Publication number
EP1268071B1
EP1268071B1 EP01923763A EP01923763A EP1268071B1 EP 1268071 B1 EP1268071 B1 EP 1268071B1 EP 01923763 A EP01923763 A EP 01923763A EP 01923763 A EP01923763 A EP 01923763A EP 1268071 B1 EP1268071 B1 EP 1268071B1
Authority
EP
European Patent Office
Prior art keywords
pipette
arm
rod
cone
screw
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
Application number
EP01923763A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1268071A1 (fr
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 SAS
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 SAS filed Critical Gilson SAS
Publication of EP1268071A1 publication Critical patent/EP1268071A1/fr
Application granted granted Critical
Publication of EP1268071B1 publication Critical patent/EP1268071B1/fr
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 sampling liquid samples.
  • a sampling pipette adapted to receive at its lower end a disposable cone frictionally attached to the pipette.
  • the pipette comprises an ejector operable by means of a button next to a sampling button. Pushing the button pushes the cone away from the pipette when you want to change the used cone for a new cone.
  • a disadvantage of this pipette is that the ejector is compatible with only one type of cone. However, it is desirable to use the pipette with cones of different sizes.
  • An object of the invention is to provide a pipette whose ejector is compatible with different types of cones.
  • a sampling pipette comprising an ejection arm for separating a cone attached to the pipette from the pipette, the pipette comprising adjustment means enabling a length to be varied. of the arm continuously in a range of values.
  • the length of the ejector can be adjusted according to the position on the pipette of the cone used.
  • the ejector is therefore compatible with many types of cones.
  • sampling pipette is of the same type as that of the document FR-2,696,110 . This document is therefore referred to for certain details of the pipette already known from this document. Only some aspects of the cone ejector mechanism will be described here in detail.
  • the pipette 2 conventionally comprises a body 2 serving as a handle to grasp by the hand of the user.
  • the pipette comprises a movable piston 6 sliding along a longitudinal axis 10 of the pipette in a lower cavity of the pipette in order to suck therein a volume of liquid to be withdrawn or to expel it out of this cavity.
  • the movement of the piston is controlled in particular by means of an axis control rod 10 connected in the lower part to the piston by pieces of a known type.
  • This rod is surmounted at its upper end by a push button rigidly attached to the stem, which the user can operate with the thumb of the hand holding the pipette.
  • the piston lowers and goes up according to the same movement of the button.
  • the pipette comprises a return spring adapted to replace the piston and the rod in the upper part at the end of their downward stroke for the expulsion of the liquid, and a purge spring adding its effect to that of the preceding spring when the race the piston continues downward for a purge stroke.
  • the pipette comprises a lower tip 7 adapted to receive, as is well known, a disposable sampling cone 9 fixed externally to the lower tip.
  • the pipette has a cone ejector mechanism illustrated in FIGS. figures 1 and 2 .
  • This mechanism comprises from top to bottom in the longitudinal direction of the pipette a control knob 12, an actuator 14, a connecting screw, 16, a wheel 18 and an ejector rod 20.
  • the ejector mechanism of the figure 1 extends in the rear part of the pipette, that is to say on the side of the palm of the hand of the user.
  • the actuator 14 is generally elongate in shape from top to bottom, narrowing downwardly. It is housed in the body 2 of the pipette being slidably movable in it along the axis 10. The pipette is arranged so that a downward pressure on the button 12 causes the descent of the actuator 14.
  • the link between the button and the actuator may be of a type known per se and will not be described here.
  • a return spring 20, shown in FIG. figure 2 ensures the raising of the actuator 14 when the solicitation stops on the button 12.
  • the actuator 14 has a lower end formed by a female attachment portion 22.
  • This portion is profiled in a direction parallel to the axis 10 and has a generally U-shaped cross section, more precisely in the form of portion of ellipse, the two branches 24 of the "U” going closer to each of their two ends.
  • the opening 26 of the "U” is directed laterally, here to the left side of the pipette.
  • the lower edge of the attachment portion 22 has a shoulder forming a step 28 extending radially projecting inwardly of the "U". This shoulder, however, also has a shape "U".
  • Each branch 24 is separated from the remainder of the actuator by a horizontal indentation 30 extending from a point about half the length of the branch to its free end.
  • the attachment portion forms a cavity 32 between the legs 24.
  • the connecting screw 16 comprises an upper head 34.
  • the head 34 comprises a support 36 in the general shape of a rectangular parallelepiped and a male fastener portion 38 adapted to penetrate into the female fastener portion 22 of the actuator.
  • the male attachment portion 38 has a profile shape parallel to the axis 10 and has transverse to this axis an elliptical general shape.
  • the connecting screw 16 has a core 40 from which extends upwardly the support 36, being offset laterally relative thereto.
  • the male part 38 has a lower height than the support 36.
  • the upper ends of the part male 38 and the support 36 are at the same level but the male portion extends away from the core 40, to allow passage between them of the step 28.
  • the male portion 38 extends to the right projecting from the support 36, and likewise forwards and backwards. It has a left and right view of a "T" profile.
  • the male part 38 is adapted to be received by fitting into the female part 22 in a lateral direction perpendicular to the axis 10.
  • the branches 24 move apart and then come closer, producing a click indicating the arrival of the male part in receiving position.
  • the bending of the branches is enabled by the indentations 30 and the material used which is a thermoplastic.
  • the step 28 is placed between the male portion 38 and the core 40.
  • the connecting screw 16 is thus rigidly attached to the actuator 14. This attachment is removable.
  • the assembly and disassembly is done by a movement in translation of the screw relative to the actuator in a left-right lateral direction.
  • the core 40 of the connecting screw comprises a flattened upper plate 42 and a thin lower portion 44 with a substantially rectangular profile. It is extended in the lower part by a threaded rod 46.
  • the ejector rod 20 has an elongate shape in the vertical direction. It has a transverse profile essentially hollow and open. However, this profile is closed at the lower end 48 of the rod to form a sliding ring slidably on a lower end 50 of the body 2 forming the free end 7 as shown in the figure 2 . This ring is able to come into direct contact with the cone in order to eject it.
  • the rod 20 has a substantially non-rectilinear shape to form the junction between this lower end 48 extending in the axis 10 of the pipette and the rear portion of the pipette in the upper part of the off-axis rod relative to the axis 10.
  • the rod has an upper vertical duct 52 of rectangular transverse profile extending from an upper face 54 of the rod to a notch 56 starting the rod horizontally from its rear face to its front face.
  • the rod has a lower duct 58 coaxial with the upper duct 52, but this time with a circular transverse profile.
  • the diameter of the lower duct 58 is equal to the width of the profile of the upper duct 52, just as the diameter of the threaded shank 46 of the screw 16 is equal to the width of the lower portion 44 of the support.
  • the wheel 18 has at its center a threaded duct to form a screw-nut connection with the rod 46 of the screw 16.
  • the wheel 18 extends into the notch 56, coaxially with the conduits 52, 58.
  • the screw 16 enters the two ducts and in the wheel.
  • the male portion 38 extends projecting from the upper face 54, the rectangular portion 44 of the support housed in the upper conduit 52 blocks the rod 20 to rotate relative to the screw but allows their relative sliding.
  • the wheel 18 forms a screw-nut connection with the rod 46 of the screw. The lower part of it is slidably received in the lower conduit 58.
  • the rod 20 is connected to the pipette on the one hand by the connecting screw 16 and on the other by the ring 48 threaded onto the tip.
  • the knob 18 is directly accessible by the user behind the pipette through the notch.
  • the rotation of the wheel causes the upward or downward sliding of the rod 20 relative to the body 2 parallel to the axis 10, to adjust its position according to the type of disposable cone used.
  • the button 12 is lowered until the rod 20 is placed at the end of the low stroke, which pushes the cone downwards and detaches it from the pipette.
  • the male 38 and female 22 parts are housed in the body 2 of the pipette and inaccessible to the user. In addition, they are protected from shocks and dirt.
  • the rod 20 can not be disassembled in this position.
  • the button 12 is lowered to place the rod at the end of the low stroke.
  • the male and female parts appear then.
  • the rod is then urged laterally to separate the male and female parts as mentioned above and as illustrated in FIG. figure 13 .
  • the lower part of the rod is then slid down to disengage it from the pipette.
  • the reassembly is done in following the reverse operations.
  • the assembly of the rod 20 and disassembly are effortless, unlike the longitudinal friction link known from the prior art.
  • the rod 20, the wheel 18 and the screw 16 constitute a first ejector arm portion adapted to be fitted laterally in the second arm portion formed by the actuator.
  • disassembly of the rod can also here take place by turning the wheel until disengaging it from the connecting screw 16. This procedure causes the separation of the rod 20, the screw 16 and the wheel 18. each other, while the procedure described above keeps these three pieces connected to each other.
  • the rod 20 can not be separated from the actuator 14 by sliding parallel to the axis 10. A separation by a relative lateral movement is necessary beforehand. No inadvertent separation is therefore to be feared during the ejection of a cone.
  • the knob 18 allows adjustment of the length of the ejector arm, formed by the actuator 14 and the rod 20, from a continuous range of length values.
  • the rod 20 to the actuator 14 by other types of connection forming obstacles to relative sliding of the ejector parts, for example one or more screw-nut connections or a bayonet connection.
  • the characteristics relating to the adjustment of the length of the arm can be implemented among a continuous range of values independently of those relating to the two parts of arms fitted into one another and dismountable in a direction perpendicular to the longitudinal direction.

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)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP01923763A 2000-04-07 2001-04-09 Pipette de prelevement a ejecteur de cone Expired - Lifetime EP1268071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0004471 2000-04-07
FR0004471A FR2807342B1 (fr) 2000-04-07 2000-04-07 Pipette de prelevement a ejecteur de cone
PCT/FR2001/001073 WO2001076753A1 (fr) 2000-04-07 2001-04-09 Pipette de prelevement a ejecteur de cone

Publications (2)

Publication Number Publication Date
EP1268071A1 EP1268071A1 (fr) 2003-01-02
EP1268071B1 true EP1268071B1 (fr) 2008-06-18

Family

ID=8848993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01923763A Expired - Lifetime EP1268071B1 (fr) 2000-04-07 2001-04-09 Pipette de prelevement a ejecteur de cone

Country Status (14)

Country Link
US (1) US7264779B2 (da)
EP (1) EP1268071B1 (da)
JP (1) JP4255638B2 (da)
KR (1) KR100718033B1 (da)
CN (1) CN1239266C (da)
AT (1) ATE398489T1 (da)
AU (2) AU2001250456B2 (da)
CA (1) CA2400681C (da)
DE (1) DE60134463D1 (da)
DK (1) DK1268071T3 (da)
FR (1) FR2807342B1 (da)
MX (1) MXPA02009877A (da)
RU (1) RU2002122737A (da)
WO (1) WO2001076753A1 (da)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6833114B1 (en) * 1999-05-18 2004-12-21 Socorex Isba S.A. Pipette with tip ejector
FR2807341B1 (fr) 2000-04-07 2002-07-12 Gilson Sa Pipette de prelevement d'echantillons liquides a ejecteur demontable
FR2807343B1 (fr) 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement munie de moyens de reglage du volume a prelever
FR2807340B1 (fr) 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement d'echantillons liquides a mecanisme d'ejecteur de cone
US7824102B2 (en) * 2006-12-09 2010-11-02 Shenzhen Mindray Bio-Medical Electronics, Inc. Thermometer quick linkage apparatus and method
US20090071267A1 (en) * 2007-09-17 2009-03-19 Greg Mathus Pipette tip ejection mechanism
PL233500B1 (pl) 2011-05-31 2019-10-31 Pz Htl Spolka Akcyjna Pipeta do używania z końcówką pipety
CH709307A1 (de) 2014-02-26 2015-08-28 Tecan Trading Ag Transportwerkzeug zum Transportieren eines Laborartikels.
CN110694706B (zh) * 2019-10-23 2021-09-03 临沂市人民医院 一种多功能移液枪

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FR4475E (fr) 1904-11-15 1905-08-26 Louis Bleriot Porte-lanterne pour automobiles
DE1009969B (de) 1956-02-17 1957-06-06 Montblanc Simplo Gmbh Schreibgeraet mit laengs verschiebbarem Schreibspitzentraeger
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US6833114B1 (en) * 1999-05-18 2004-12-21 Socorex Isba S.A. Pipette with tip ejector
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US6532837B1 (en) 2000-02-03 2003-03-18 Rainin Instrument, Llc Pipette device with tip ejector utilizing stored energy
FR2807558B1 (fr) 2000-04-07 2004-04-02 Gilson Sa Pipette de prelevement munie de moyens d'affichage d'un parametre de la pipette
FR2807343B1 (fr) 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement munie de moyens de reglage du volume a prelever
FR2807340B1 (fr) 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement d'echantillons liquides a mecanisme d'ejecteur de cone
FR2807345B1 (fr) 2000-04-07 2002-07-12 Gilson Sa Pipette de prelevement a demontage simplifie
FR2807341B1 (fr) 2000-04-07 2002-07-12 Gilson Sa Pipette de prelevement d'echantillons liquides a ejecteur demontable
FR2807339B1 (fr) 2000-04-07 2002-12-13 Gilson Sa Pipette de prelevement d'echantillons liquides a ejecteur reglable
FI5089U1 (fi) 2001-07-06 2001-09-28 Biohit Oyj Imulaite

Also Published As

Publication number Publication date
KR100718033B1 (ko) 2007-05-16
DE60134463D1 (de) 2008-07-31
CA2400681A1 (en) 2001-10-18
US20040028564A1 (en) 2004-02-12
CN1239266C (zh) 2006-02-01
ATE398489T1 (de) 2008-07-15
KR20020093812A (ko) 2002-12-16
EP1268071A1 (fr) 2003-01-02
DK1268071T3 (da) 2008-09-29
RU2002122737A (ru) 2004-08-27
CN1418130A (zh) 2003-05-14
FR2807342A1 (fr) 2001-10-12
AU2001250456B2 (en) 2006-02-02
WO2001076753A1 (fr) 2001-10-18
CA2400681C (en) 2009-01-13
MXPA02009877A (es) 2004-05-05
FR2807342B1 (fr) 2002-07-12
JP2003530552A (ja) 2003-10-14
AU5045601A (en) 2001-10-23
JP4255638B2 (ja) 2009-04-15
US7264779B2 (en) 2007-09-04

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