EP1171240A1 - Pipettenspitze, pipettiervorrichtung und kombination aus pipettenspitze und pipettiervorrichtung - Google Patents
Pipettenspitze, pipettiervorrichtung und kombination aus pipettenspitze und pipettiervorrichtungInfo
- Publication number
- EP1171240A1 EP1171240A1 EP00926950A EP00926950A EP1171240A1 EP 1171240 A1 EP1171240 A1 EP 1171240A1 EP 00926950 A EP00926950 A EP 00926950A EP 00926950 A EP00926950 A EP 00926950A EP 1171240 A1 EP1171240 A1 EP 1171240A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipette tip
- coupling
- axial
- pipetting
- positioning means
- 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
Links
- 230000008878 coupling Effects 0.000 claims abstract description 116
- 238000010168 coupling process Methods 0.000 claims abstract description 116
- 238000005859 coupling reaction Methods 0.000 claims abstract description 116
- 238000007789 sealing Methods 0.000 claims description 47
- 230000000295 complement effect Effects 0.000 claims description 11
- 230000003993 interaction Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
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
- B01L3/0275—Interchangeable or disposable dispensing tips
- B01L3/0279—Interchangeable or disposable dispensing tips co-operating with positive ejection means
Definitions
- the invention is concerned with the attachment of a pipette tip to a pipetting device.
- Pipetting devices are used, for example, in the field of molecular biology or medical analysis for liquid transfer. Special pipette tips are often used, which are attached to the pipetting device and are intended for single use. Such disposable tips are also known as "tip”.
- the pipetting device can be a manual pipetting device which has only a single pipetting unit.
- pipetting machines or so-called pipetting robots are often also used, which have a large number of pipetting units arranged in a row or in a matrix. With such automatic pipetting devices, samples can be aspirated from a multitude of vessels at the same time and released again at another point.
- the pipette tips have mostly been designed with a conically widening jacket region, with which they are placed on a correspondingly conically shaped coupling attachment of the pipetting device, or rather the respective pipetting unit.
- the pipette tip is pressed so firmly onto the coupling attachment that a frictional press fit is established between the pipette tip and the coupling attachment.
- comparatively high contact forces are required.
- the material of the pipette tip has a certain elasticity, which leads to the fact that the pipette tip during Pressing onto the coupling cone expands. This can cause micro-cracks in the pipette tip, which are the cause of leakage. Dirt particles on the coupling cone can also lead to leakage.
- the high contact forces when attaching the pipette tip also have the disadvantage that correspondingly high forces have to be applied to eject the pipette tip.
- a defined position of the pipette tip relative to the coupling attachment is, however, particularly important in the case of automatic pipetting machines which have a large number of pipetting units.
- Different positions of the pipette tips in automatic pipetting devices with several tens or even several hundred pipetting units can, for example, result in some of the pipette tips being properly immersed in the vessels assigned to them or in the wells of a microtiter plate, while other pipette tips remain in the vessels or wells above the liquid level . It can also happen that individual pipette tips hit the bottom of the vessels or depressions and thereby at least partially block their mouth opening. The result can be insufficient dosing accuracy both when taking up liquid and when dispensing liquid.
- the invention is based on a pipette tip for attachment to a pipetting device, the pipette tip having a jacket and a passage opening enclosed by the jacket, the passage opening being along a longitudinal axis between a pipe to be immersed in Medium determined first end of the pipette tip and a second end of the pipette tip opposite in the axial direction, and wherein the pipette tip near the second end Coupling area for coupling with a coupling approach of the pipetting device.
- the jacket carries axial positioning means in the coupling area, which are intended for interaction with complementary counter-axial positioning means of the coupling attachment and which, together with the counter-axial positioning means, define an axial coupling position of the pipette tip on the pipetting device.
- the axial positioning means make it possible to obtain a predetermined, defined axial position of the pipette tip relative to the pipette device each time the pipette tip is attached to the pipette device. This enables all pipetting units of an automatic pipetting machine to be fitted with pipette tips in an exact position and in the same position.
- the pipette tip can be plugged onto the coupling attachment with its second front end, which is why the axial positioning means are expediently arranged at least in part on the inner circumference of the jacket at an axial distance from the second front end of the pipette tip.
- the inner circumference of the jacket can have an envelope essentially formed by cylindrical sections, at least in the coupling region.
- the axial positioning means can comprise at least one axial stop arranged on the jacket, which is intended to interact with a complementary counter-stop of the coupling attachment.
- the axial stop comes into engagement with the counter-stop of the coupling attachment, which results in a defined axial position of the pipette tip.
- the coupling attachment also carries an elastically deformable O-sealing ring that comes into frictional engagement with a sealing surface of the pipette tip due to axial crushing and consequent radial expansion, there is a particularly simple, but nevertheless highly accurate possibility of attaching the pipette tip to the pipetting device.
- the axial stop can be formed by an axial step shoulder of the jacket inner circumference, which connects a first cylindrical jacket inner circumferential section of larger diameter closer to the second front end with a second cylindrical jacket inner circumferential section further away from the second front end.
- the reduction in diameter caused by the step section from the first to the second inner circumferential section of the jacket can be between 0.8 and 1.2 mm, preferably between 0.9 and 1.1 mm, most preferably approximately 1.0 mm.
- the diameter of the first inner circumferential section of the jacket can be between 6.5 and 7.1 mm, preferably between 6.7 and 6.9 mm, most preferably about 6.8 mm.
- this can be between 5.5 and 6.1 mm, preferably between 5.7 and 5.9 mm, most preferably about 5.8 mm. It is advisable to define a standard coupling interface between the pipette tip and the pipetting device, so that pipette tips with different holding volumes for liquids to be pipetted, but with standardized coupling areas, can be combined with one and the same pipetting device.
- the exact axial positioning of the pipette tip by its axial stop and the counter stop of the coupling attachment can be further improved in that the jacket in the coupling area has a contact surface for a biasing element held on the pipetting device, which is intended to be in the coupling position of the Pretension the pipette tip axially against the counter stop of the coupling attachment.
- a structurally particularly simple solution can consist in the fact that the engagement surface is at the same time designed for the sealing contact of a sealing element forming the prestressing element made of elastically deformable material which serves to seal the pipette tip with respect to the coupling attachment.
- the sealing element therefore not only performs a sealing function, but also a pretensioning function. Solutions known per se can be used for the sealing element.
- the sealing element can be formed by an O-ring and can be axially compressible in accordance with US Pat. No. 5,063,790 by a squeezing device of the pipetting device. It can then be provided that the engagement surface is designed and localized on the jacket so that in the coupling position of the pipette tip, the sealing element is in an axially uncompressed state essentially outside of the pre-tensioning engagement with the engagement surface and in the course of an axial compression in pre-tensioning force Engages with the attack surface.
- the engagement surface can be formed, for example, on a circumferential groove machined into the inner circumference of the casing, into which the sealing element of the coupling attachment can "snap".
- the circumferential groove can be curved in a circular arc, its radius of curvature being between 0.3 and 0.9 mm, preferably between 0.4 and 0.8 mm, most preferably between 0.5 and 0.7 mm can be.
- the contact surface is preferably arranged axially between the axial stop and the second end of the pipette tip.
- the invention provides a pipetting device with at least one pipetting unit which has a pipetting channel running along a channel axis and a coupling attachment for coupling a pipette tip, in particular of the type described above, with the coupling attachment for interaction has complementary counter-axial positioning means with axial positioning means of the pipette tip which, together with the axial positioning means, define an axial coupling position of the pipette tip on the pipetting unit.
- the coupling attachment can be inserted into the pipette tip with one plug end in front, in which case it is then advisable to arrange the counter-axial positioning means at least in part on the outer circumference of the coupling attachment at an axial distance from the plug end.
- the outer circumference of the coupling attachment can have an envelope formed essentially by cylindrical sections, at least in the area of the coupling attachment projecting into the pipette tip in the coupling position.
- the counter-axial positioning means can comprise at least one complementary counter-stop on the coupling attachment which is intended to interact with an axial stop of the pipette tip.
- This counter-stop can be formed by a step shoulder on the outer circumference of the coupling attachment.
- the coupling attachment can carry a sealing element, in particular an O-sealing ring, made of elastically deformable material which serves to seal between the pipette tip and the coupling attachment, wherein the pipetting unit can be assigned a squeezing device for axially compressing the sealing element.
- the sealing element can not only perform a sealing function, but also a prestressing function if the pipette tip has a correspondingly designed and localized contact surface for the sealing element, which has a radial surface component and can be loaded by the sealing element with an axial force component.
- the invention finally relates to the combination of a pipette tip of the type described above with a pipetting device of the type described above.
- Fig. 1 in section an embodiment of a pipette tip according to the invention
- FIG. 1 One recognizes there a pipette tip 1, also referred to as a tip, with a jacket 5 which is rotationally symmetrical about a longitudinal axis 3 and which surrounds a through-opening 7 axially passing through the pipette tip 1.
- the pipette tip 1 In the area of its open top end 9 in FIG. 1, the pipette tip 1 has a coupling area 11, which is used for coupling to a pipetting device (not shown in more detail in FIG. 1).
- the pipette tip is located opposite the front end 9 1 a mouth end 1 3, which is intended for immersion in the medium to be pipetted.
- the jacket 5 of the pipette tip 1 has an outer circumference 15 and an inner circumference 17.
- the inner circumference 17 has a cylindrical inner circumferential section 19, which essentially extends from the front end 9 to an annular step shoulder 21, to which a further cylindrical inner circumferential section 23 adjoins.
- the step heel 21 forms an axially directed stop surface.
- an annular groove 25 running in the circumferential direction is machined into the casing 5.
- This annular groove 25, which is arranged axially between the front end 9 and the step shoulder 21, has a groove contour in the sectional view of FIG. 1, which follows an arc.
- the jacket 5 has a first conical wall section 27 and a second conical wall section 29, the taper of which is weaker than that of the wall section 27.
- the jacket 5 is made with a smaller wall thickness than in the coupling area 11. The greater wall thickness in the coupling area 11 increases the stability and rigidity of the pipette tip 1 there. This allows a safe and leak-free coupling of the pipette tip 1 to a pipetting device.
- the inner diameter of the jacket 5 in the area of the inner circumferential section 19 can be approximately 6.8 mm and in the area of the inner circumferential section 23 approximately 5.8 mm.
- the step heel 21 can be arranged at an axial distance from the front end 9 of approximately 5 mm.
- the radius of curvature of the circular contour of the annular groove 25 can be approximately 0.6 mm.
- the maximum radial depth of the annular groove 25 can be approximately 0.2 mm.
- the axial distance between the step 21 and the axial center of the annular groove 25, that is to say the deepest point thereof, can be approximately 2.1 mm.
- the same reference numerals as in FIG. 1 are used for identical or equivalent components of the pipette tip, but increased by the number 100. To avoid repetition, reference is made to the above explanations for FIG. 1.
- a pipetting unit 201 which is part of a manually or automatically operated pipetting device and has a coupling attachment 203, which is intended for coupling to the pipette tip 101.
- the pipetting device mentioned is designed as a pipetting robot, it can carry a large number of such pipetting units 201, for example up to a few hundred.
- the pipetting unit 201 has a pipetting tube 205 which contains a pipetting channel 207 which runs along a channel axis 209 and is continued from the through opening 107 of the pipette tip 101 to the pipette unit 201 when the pipette tip 101 is coupled.
- the coupling projection 203 comprises a coupling sleeve 21 1 fixedly attached to the pipette tube 205 at the lower end thereof, for example pressed or screwed on.
- An O-ring 213 made of elastically deformable and, if desired, electrically conductive material is pushed onto the pipetting tube 205 and rests on the end face of the coupling sleeve 21 1 which is axially remote from the pipette tip 101.
- a crimp sleeve 215 is pushed onto the pipetting tube 205. This crimp sleeve 215 is axially displaceable relative to the pipetting tube 205 and serves for the axial crimping of the O-sealing ring 213.
- the crimp sleeve 215 can be actuated by means of actuating means (not shown). These actuating means can enable manual or automatic actuation of the crimp sleeve 215.
- the crimp sleeve 215 can be actuated hydraulically. It is also conceivable to provide a screw drive for the adjustment of the crimp sleeve 215, which can be actuated by hand, but which can also be actuated by means of an electric motor.
- an ejector 21 7 which is axially movable relative to the pipette tube 205 and which, in the exemplary embodiment shown, is designed as an ejector tube surrounding the squeeze sleeve 21 5 and the pipette tube 205. The manner in which the ejector 21 7 is actuated will be discussed further below.
- an annular step shoulder 21 9 which is complementary to the step shoulder 1 21 of the pipette tip 101, is formed, which strikes the step shoulder 1 21 of the pipette tip 101 when the coupling shoulder 203 is inserted into the pipette tip 1 01.
- the coupling sleeve 21 1 Towards the end of the coupling attachment 203 leading when it is inserted, the coupling sleeve 21 1 has a cylindrical outer circumferential section 221, the diameter of which is matched to the diameter of the inner circumferential section 123 of the pipette tip 101 in the sense of a smooth insertion of the pipette tip 101 onto the coupling attachment 203 .
- a further cylindrical outer circumferential section 223 of the coupling sleeve 21 1 adjoins the step shoulder 21 9 on the axially other side, the diameter of which is matched in the same sense to the diameter of the inner circumferential section 1 1 9 of the pipette tip 101.
- Fig. 3 shows the state when the pipette tip 1 01 is plugged in and the O-ring 213 is still not squeezed. It can be seen that the axial distance of the step shoulder 21 9 of the coupling sleeve 21 1 from the axial end face of the coupling sleeve 21 1, on which the O-sealing ring 21 3 rests, is dimensioned such that in the plug-on position shown in FIG. Sealing ring 21 3 is axially offset slightly from the annular groove 1 25. More specifically, the axial center of the annular groove 1 25 is somewhat opposite the axial center of the uncompressed O-sealing ring 21 3 to the pipette tip 101 offset.
- FIGS. 4 and 4a show the state in which the pinching of the O-sealing ring 213 has been completed and the final assembly position of the pipette tip 1 01 on the pipetting unit 201 has been established, and of which 4a shows an enlarged section in the area of the O-sealing ring 21 3.
- the crimp sleeve 21 5 has at its end facing the O-ring 213 a leading tip 225, which penetrates between the O-ring 21 3 and the pipette tube 205 when the crimp sleeve 21 5 approaches the O-ring 21 3, so that the O-ring 21 3 is not only axially compressed, but is also pressed radially somewhat towards the annular groove 1 25 by the tip 225.
- the O-ring 21 3 experiences an overall increase in its outer diameter. Its radially pressed out parts can escape into the space left free by the annular groove 125, which is indicated by the dashed lines in FIG. 4a.
- the parts of the O-ring 21 3 escaping into the ring groove 1 25 try to relax and expand in the ring groove 1 25, whereby they come to rest on the bottom of the ring groove 1 25 and press against it.
- the previously mentioned axial offset of the annular groove 1 25 with respect to the O-sealing ring 1 23 causes the O-sealing ring 21 3 to press primarily against the region of the bottom of the annular groove 1 25 which is axially upper in FIG. 4a. In this area, the bottom of the annular groove 1 25 forms an engagement surface 1 27 for the O-ring 21 3.
- This engagement surface 1 27 has a radial component due to its curvature, so that when the O-ring 21 3 presses against the engagement surface 127 , a force is exerted on the pipette tip 101 with an axial component.
- This axial force biases the step shoulder 1 21 of the pipette tip 1 01 axially against the step shoulder 21 9 of the coupling sleeve 21 1, whereby a secure axial hold of the pipette tip 1 01 on the pipetting unit 201 is brought about.
- the final coupling state of the pipette tip 101 to the pipette unit 201 in which the secure and sealing hold of the pipette tip 101 on the pipette unit 201 is brought about by axial pinching and radial expansion of the O-sealing ring 21, is shown in FIG. 4.
- the squeeze sleeve 215 is axially raised from its squeeze position shown in FIG. 4, as a result of which the O-ring 213 relaxes again and withdraws from the annular groove 125.
- the pretensioning force exerted on the step shoulders 121, 219 in the coupling state according to FIG. 4 is thereby eliminated.
- the state shown in FIG. 3 is restored. 3, the O-sealing ring 213 is expediently not completely out of contact with the inner periphery 11 of the pipette tip 101, but is in such engagement with the inner periphery 117 of the pipette tip 101 that the pipette tip 101 does not of itself the pipetting unit 201 falls.
- the cylindrical inner circumferential section 11 19 of the pipette tip 101 located above the annular groove 125 is preferably of stepped design, as can be seen in particular in FIG. 4a.
- the transition edge 1 29 At a small axial distance from the transition edge 1 29, it has a step extension formed by a step 1 31, which brings about a corresponding increase in the diameter of this inner circumferential section 1 1 9.
- the O-ring 213 When the O-ring 213 has overcome the "cut-in zone" formed between the transition edge 1 29 and the step 1 31, it can relax completely and loses contact with the inner circumference 1 1 7 of the pipette tip 101, so that the pipette tip 101 then moves smoothly can be stripped off by the pipetting unit 201.
- the ejector 21 7 is provided. This can be operated in a variety of ways. For example, hydraulic or electromotive actuation of the ejector 217 is conceivable. Alternatively, a prestressing spring (not shown in more detail) can engage on the ejector 21 7, which is tensioned when the pipette tip 1 01 is placed on the pipetting unit 201 when the pipette tip 101 presses the ejector tube forming the ejector 217 upward with its front end 109. If the pinch of the O-sealing ring 21 3 is then removed, this ejector preload spring can relax again.
- the Ejector preload spring will be dimensioned so that the force exerted on the ejector tube 217 by it in the tensioned state does not exceed the axial holding force of the O-ring 213. At the same time, it will be dimensioned such that the force exerted on the pipette tip 101 in the course of its relaxation is sufficient to move the edge 129 past the O-ring 213.
- FIG. 5 shows the ejection state in which the ejector 217 is moved downward and the pipette tip 101 is completely moved past the O-sealing ring 213.
- the pipetting tube 205 of the pipetting unit 201 will be assigned suitable suction means which allow a negative pressure to be generated in the pipetting channel 207 and thus in the pipette tip 101, which leads to the suction of liquid to be pipetted.
- suction means can comprise, for example, a piston which is axially movable in the pipetting tube 205 and which can be axially adjusted by means of electrical, hydraulic or pneumatic actuating means.
- the pipette tip 101 is preferably made of a plastic material, for example by injection molding.
- This plastic material can be electrically conductive in order to be able to carry out conductivity measurements on the liquid to be pipetted in a manner known per se.
- the coupling sleeve 21 1 and the pipetting tube 205 can also consist of conductive materials.
- metals are preferably used here, although plastic materials for the coupling sleeve 21 1 and the pipetting tube 205 are not excluded.
- the capacity of the pipette tip 101 designed as a disposable article can be, for example, between 0.1 and 1300 / l.
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19917375A DE19917375C2 (de) | 1999-04-16 | 1999-04-16 | Pipettiereinheit |
| DE19917375 | 1999-04-16 | ||
| PCT/EP2000/003423 WO2000062933A1 (de) | 1999-04-16 | 2000-04-14 | Pipettenspitze, pipettiervorrichtung und kombination aus pipettenspitze und pipettiervorrichtung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1171240A1 true EP1171240A1 (de) | 2002-01-16 |
| EP1171240B1 EP1171240B1 (de) | 2003-07-02 |
| EP1171240B2 EP1171240B2 (de) | 2006-06-14 |
Family
ID=7904895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00926950A Expired - Lifetime EP1171240B2 (de) | 1999-04-16 | 2000-04-14 | Pipettenspitze, pipettiervorrichtung und kombination aus pipettenspitze und pipettiervorrichtung |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US7033543B1 (de) |
| EP (1) | EP1171240B2 (de) |
| JP (1) | JP3977597B2 (de) |
| AT (1) | ATE244070T1 (de) |
| DE (2) | DE19917375C2 (de) |
| ES (1) | ES2197094T5 (de) |
| WO (1) | WO2000062933A1 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2192186A1 (de) | 2008-11-28 | 2010-06-02 | F. Hoffmann-Roche AG | System und Verfahren zur automatischen Extraktion von Nukleinsäuren |
| DE102017220042A1 (de) | 2017-11-10 | 2019-05-16 | Hamilton Bonaduz Ag | Pipettiervorrichtung mit elektromagnetisch antreibbarem Verriegelungsaktuator zur Verriegelung von lösbar angekuppelten Pipettierspitzen |
| CN110433883A (zh) * | 2016-06-15 | 2019-11-12 | 汉密尔顿公司 | 移液装置、移液管末梢联接器和移液管末梢:装置和方法 |
| DE102022120212A1 (de) | 2022-08-10 | 2024-02-15 | Hamilton Bonaduz Ag | Pipettierspitze mit sich gekrümmt verjüngendem Aufnahmeraum |
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| US6596240B2 (en) * | 2001-01-12 | 2003-07-22 | Porex Corporation | Pipette tip for easy mounting and ejecting from a pipette |
| US6973845B2 (en) * | 2001-01-18 | 2005-12-13 | Beckman Coulter, Inc. | Low insertion force tip/mandrel |
| FI20010972A0 (fi) * | 2001-05-09 | 2001-05-09 | Thermo Labsystems Oy | Kärkisäiliöpipetti |
| US6568288B2 (en) * | 2001-06-29 | 2003-05-27 | Rainin Instrument, Llc | Pipette with improved pipette tip and mounting shaft |
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| EP1329262B1 (de) | 2002-01-16 | 2009-08-19 | Brand Gmbh + Co Kg | Pipette und Verfahren zur Herstellung einer Pipette |
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| US6793891B2 (en) * | 2002-04-08 | 2004-09-21 | Felxi Yiu | Pipettor and externally sealed pipette tip |
| US7517694B2 (en) * | 2002-07-26 | 2009-04-14 | Ortho-Clinical Diagnostics, Inc. | Metering tip with internal features to control fluid meniscus and oscillation |
| DE10345324B3 (de) * | 2003-09-30 | 2004-08-19 | Eppendorf Ag | Pipettenspitze |
| US7641859B2 (en) | 2004-02-11 | 2010-01-05 | Matrix Technologies Corporation | Pipette tip mounting and ejection assembly and associated pipette tip |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2192186A1 (de) | 2008-11-28 | 2010-06-02 | F. Hoffmann-Roche AG | System und Verfahren zur automatischen Extraktion von Nukleinsäuren |
| CN110433883A (zh) * | 2016-06-15 | 2019-11-12 | 汉密尔顿公司 | 移液装置、移液管末梢联接器和移液管末梢:装置和方法 |
| CN110433883B (zh) * | 2016-06-15 | 2021-11-16 | 汉密尔顿公司 | 移液装置、移液管末梢联接器和移液管末梢:装置和方法 |
| DE102017220042A1 (de) | 2017-11-10 | 2019-05-16 | Hamilton Bonaduz Ag | Pipettiervorrichtung mit elektromagnetisch antreibbarem Verriegelungsaktuator zur Verriegelung von lösbar angekuppelten Pipettierspitzen |
| WO2019092089A1 (de) | 2017-11-10 | 2019-05-16 | Hamilton Bonaduz Ag | Pipettiervorrichtung mit elektromagnetisch antreibbarem verriegelungsaktuator zur verriegelung von lösbar angekuppelten pipettierspitzen |
| DE102022120212A1 (de) | 2022-08-10 | 2024-02-15 | Hamilton Bonaduz Ag | Pipettierspitze mit sich gekrümmt verjüngendem Aufnahmeraum |
| WO2024033285A1 (de) | 2022-08-10 | 2024-02-15 | Hamilton Bonaduz Ag | Pipettierspitze mit sich gekrümmt verjüngendem aufnahmeraum |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002542017A (ja) | 2002-12-10 |
| US9415388B2 (en) | 2016-08-16 |
| ES2197094T3 (es) | 2004-01-01 |
| US7033543B1 (en) | 2006-04-25 |
| US20060233669A1 (en) | 2006-10-19 |
| DE19917375A1 (de) | 2000-11-02 |
| EP1171240B1 (de) | 2003-07-02 |
| ATE244070T1 (de) | 2003-07-15 |
| JP3977597B2 (ja) | 2007-09-19 |
| DE50002736D1 (de) | 2003-08-07 |
| DE19917375C2 (de) | 2001-09-27 |
| EP1171240B2 (de) | 2006-06-14 |
| ES2197094T5 (es) | 2006-11-16 |
| WO2000062933A1 (de) | 2000-10-26 |
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