EP0143796A1 - Pipette de dosage. - Google Patents

Pipette de dosage.

Info

Publication number
EP0143796A1
EP0143796A1 EP84901351A EP84901351A EP0143796A1 EP 0143796 A1 EP0143796 A1 EP 0143796A1 EP 84901351 A EP84901351 A EP 84901351A EP 84901351 A EP84901351 A EP 84901351A EP 0143796 A1 EP0143796 A1 EP 0143796A1
Authority
EP
European Patent Office
Prior art keywords
dosage
rack
toothed
pipette
lever
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
EP84901351A
Other languages
German (de)
English (en)
Other versions
EP0143796B1 (fr
Inventor
Mikael Fagerstedt
Erkki Kaski
Jukka Tervamaki
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.)
Thermo Fisher Scientific Oy
Original Assignee
Labsystems Oy
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 Labsystems Oy filed Critical Labsystems Oy
Priority to AT84901351T priority Critical patent/ATE31150T1/de
Publication of EP0143796A1 publication Critical patent/EP0143796A1/fr
Application granted granted Critical
Publication of EP0143796B1 publication Critical patent/EP0143796B1/fr
Expired legal-status Critical Current

Links

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
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
    • B01L3/0234—Repeating pipettes, i.e. for dispensing multiple doses from a single charge

Definitions

  • the invention described herein is concerned with a pipette which is provided with a piston and a cylinder and with two operating knobs, whereat, by means of one of the said knobs, the cylinder can be filled with liquid by depressing the knob once, and by means of the other one of the knobs, the cylinder can be emptied stepwise by means of successive depressions of the piston, of desired magnitude.
  • a pipette which is provided with a piston and a cylinder and with two operating knobs, whereat, by means of one of the said knobs, the cylinder can be filled with liquid by depressing the knob once, and by means of the other one of the knobs, the cylinder can be emptied stepwise by means of successive depressions of the piston, of desired magnitude.
  • step pipettes are known in prior art, e.g., a pipette in accordance with the published Finnish Patent Application FI 802,403 or the pipette as per the German published Patent
  • a dosage pipette has been invented in which, in a way in itself known, the piston has been connected with a toothed rack, which can be pushed out ⁇ wards from the pipette by steps of specified magnitude by means of the dosage lever and a striking pin mounted on same.
  • a novelty of the pipette is a resilient lifting lever placed at the side of the toothing, the distance of the said lifting lever from the end of the toothed rack being adjustable to the desired level and the said lever being provided with a cam which lifts the striking pin apart from the toothing for the time of the rising stage of the striking pin.
  • the top end of the toothed rack should preferably be provided with a cam which, when the toothed rack approaches the bottom position, raises the lifting lever by the height of the toothing. Thereby the cam of the lifting lever raises the striking pin to such an extent that the striking pin no longer reaches the toothing when the lever is depressed.
  • the toothed rack is provided with a second toothing, with a cogwheel which rests against the said second toothing and which, at the other side, rests against a second toothed rack, which is provided with a press knob.
  • the pipette is easy to operate, because it can be filled by one hand, while the other hand remains free, e.g., for the handling of test tubes.
  • the lifting-lever system described here is of simple construction and reliable in operation. By means- of the cam provided at the top end of the toothed rack, it is, moreover, possible to avoid the pipetting of the last, too little dose.
  • Figure I is a sectional side view of an embodiment
  • Figure II is a certain sectional view of same as viewed from the top
  • Figure III shows a detail of the tip portion of a multi-tip pipette.
  • the pipette comprises an oblong handle 1 , at whose lower end there is a cylinder 2, and in the cylinder a piston 3.
  • the cylinder may be attached to the handle, e.g., by means of a bayonet socket.
  • a -toothed rack 4 parallel to the handle is attached, which rack is provided with two toothings 5 and 6.
  • a striking pin 8 is pressed against the toothing 6 by the force of a spring 16, and the striking pin is mounted on a lever 9.
  • the lever 9 is mounted on a shaft 15 located in the handle.
  • the lever is connected with a spring 19, which attempts to keep the lever in its upper position. The movement of the striking pin 8 is stopped at the lower position by a limiter 18.
  • OMPI A cogwheel 7 operates in contact with the toothing 5 on the toothed rack 4 , which cogwheel is mounted on a shaft 10. At the other side, the cogwheel 7 operates in contact with a toothed rack 11 , whose top r ⁇ 5 end is provided with a press knob 12.
  • a resilient lifting lever 20 At the side of the toothing 6 on the toothed rack 4, there is a resilient lifting lever 20 and, on the lever, a cam 21, which raises the striking pin 8 apart from the toothing 6 during the stage of upward 10 movement of the lever 9.
  • the top end of the lifting lever is provided with a guide pin 23, which is fitted into a guide groove 25 provided in the adjusting wheel 24.
  • the adjusting wheel is mounted on a shaft 26.
  • the top end of the toothed rack 4 is addi- 15 tionally provided with a cam 22, which, as the toothed rack approaches its lower position, shifts the lifting lever 20 towards the striking pin 8.
  • the pipette operates so that, when the lever 9 is in its upper position and when the striking pin 8 20 is, consequently, apart from the toothing 6 and when the piston 3 is in the cylinder 2 in its lower position, the press knob 12 is depressed, whereat the cogwheel 7 starts revolving and lifts the toothed rack 4 and, along with the rack, the piston 3 in the cylinder 2 upwards. 25 In this way, suction is generated in the cylinder 2, whereby the cylinder is filled with liquid 13.
  • the dosage can be started by means of the lever 9. 30
  • the spring 16 presses the striking pin 8 into the toothing 6, whereat the striking pin 8 starts pushing the toothed rack 4 and the piston 3 downwards until the striking pin 8 meets the limiter 18 , against which the movement stops. 35
  • the spring 19 restores the dosage lever 9 back to its upper position upon completion of the depressing. Thereat, the striking pin 8 must jump over the toothing 6 until, near the upper position of the striking pin 8, the cam 21 of the resilient lifting lever 20 raises the striking pin 8 apart from the toothing 6.
  • the dosage can be repeated until the toothed rack 4 and the piston 3 approach their lower position.
  • the cam 22 at the top end of the toothed rack 4 meets the lifting lever 20 and raises it by the height of the toothing 6.
  • the cam 21 of the lifting lever 20 raises the striking pin 8 to such an extent that the striking pin no longer reaches the toothing 6 when the lever 9 is depressed again for dosage.
  • the guide groove 25 shifts the lifting lever 20 upwards or downwards by the intermediate of the pin 23, whereat, correspondingly, at the bottom end of the lifting lever, the cam 21 is shifted and permits the striking pin 8 to move over the desired distance on the toothing 6, e.g. over 1, 2, 3, 4 or more teeth, per each depression of the dosage lever 9. In this way, a 1-, 2-, 3- or 4-fold dose is obtained.
  • toothings 5 and 6 are shown as located one after the other, but, if • desired, they may also be very well placed side by side on the toothed rack 4.

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Transmission Devices (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Pipette pourvue d'un piston, d'une crémaillère dentée reliée au piston, d'un ergot percuteur reposant contre la crémaillère dentée, et d'un levier de dosage monté sur l'ergot percuteur. En appuyant sur les leviers, la pipette remplie peut être vidée en obtenant des doses successives d'un ordre de grandeur spécifié. La pipette est pourvue en outre d'un levier de levage (20) placé à côté de la denture, la distance entre ledit levier et l'extrémité de la crémaillère dentée étant réglable (24), ce levier permettant à l'ergot percuteur de pousser la crémaillère dentée uniquement sur une distance spécifiée. Il est ainsi possible de régler selon les besoins l'ordre de grandeur du pas de vidange. La crémaillère dentée est en outre pourvue d'une deuxième denture (5), un pignon (7) reposant contre cette denture, et, de l'autre côté, reposant contre une deuxième crémaillère dentée (11), dont l'extrémité supérieure est pourvue d'un bouton poussoir (12). En appuyant sur ce bouton, la crémaillère dentée de dosage avec son piston remonte dans sa position supérieure et la pipette se remplit.
EP84901351A 1983-04-13 1984-03-29 Pipette de dosage Expired EP0143796B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84901351T ATE31150T1 (de) 1983-04-13 1984-03-29 Dosierpipette.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI831239A FI831239A0 (fi) 1983-04-13 1983-04-13 Doseringspipett
FI831239 1983-04-13

Publications (2)

Publication Number Publication Date
EP0143796A1 true EP0143796A1 (fr) 1985-06-12
EP0143796B1 EP0143796B1 (fr) 1987-12-02

Family

ID=8517044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901351A Expired EP0143796B1 (fr) 1983-04-13 1984-03-29 Pipette de dosage

Country Status (7)

Country Link
EP (1) EP0143796B1 (fr)
JP (1) JPS60501048A (fr)
DE (1) DE3467860D1 (fr)
FI (1) FI831239A0 (fr)
IT (1) IT1178875B (fr)
SU (1) SU1373300A3 (fr)
WO (1) WO1984004056A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4728501A (en) * 1984-07-27 1988-03-01 Minoru Atake Adjustable liquid sampling apparatus
US4929428A (en) * 1988-02-19 1990-05-29 Fuji Photo Film Co., Ltd. Quantitative pipette
DE4141608C2 (de) * 1991-12-17 1993-12-02 Eppendorf Geraetebau Netheler Pipettiervorrichtung
FI921648A0 (fi) * 1992-04-13 1992-04-13 Labsystems Oy Stegpipett.
US5364596A (en) * 1992-12-01 1994-11-15 Rainin Instrument Co., Inc. Manual pipette with plunger velocity governor, home position latch and trigger release
FI931806A0 (fi) * 1993-04-21 1993-04-21 Labsystems Oy Kolvpipett
DE9415847U1 (de) * 1994-09-30 1994-12-08 Ritter, Ralf, 86150 Augsburg Repetierpipette
FI961649A0 (fi) * 1996-04-15 1996-04-15 Labsystems Oy Spaerrpipett
FR2762671B1 (fr) * 1997-04-29 1999-07-16 D Autry Eric Marteau Dispositif de distribution de volumes sucessifs de liquide avec element d'accrochage aimante
FI108281B (fi) * 1999-07-07 2001-12-31 Biohit Oyj Imulaite ja menetelmä käytettäväksi imulaitteessa
FR2807340B1 (fr) * 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement d'echantillons liquides a mecanisme d'ejecteur de cone
FR2807339B1 (fr) * 2000-04-07 2002-12-13 Gilson Sa Pipette de prelevement d'echantillons liquides a ejecteur reglable
FR2836400B1 (fr) * 2002-02-25 2004-07-09 Junior Instruments Dispositif de pipetage automatique de precision
DE202010010942U1 (de) 2010-08-03 2011-11-08 Brand Gmbh + Co Kg Pipette für ein Pipettensystem mit Pipette und Spritze
GB2504333B (en) * 2012-07-26 2016-10-05 Ttp Labtech Ltd Liquid dispensing device
DE102014109345A1 (de) 2014-07-04 2016-01-07 Eppendorf Ag Pipette zum Betätigen einer Spritze
BE1022747A9 (nl) * 2015-02-27 2016-10-03 Pilipili Productontwerp Nv Activator voor het opbouwen en vrijgeven van een zekere kracht
FI3928868T3 (fi) * 2020-06-22 2025-02-20 Eppendorf Se Pipetti käytettäväksi männän ja sylinterin käsittävän pipetinkärjen tai ruiskun kanssa

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926691C2 (de) * 1979-07-02 1983-05-26 Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg Repetierpipette
US4099548A (en) * 1976-08-25 1978-07-11 Oxford Laboratories Inc. Hand-held pipette for repetitively dispensing precise volumes of liquid
FI60137C (fi) * 1979-03-23 1981-12-10 Suovaniemi Finnpipette Pipett
FI58875C (fi) * 1979-08-31 1981-05-11 Suovaniemi Finnpipette Pipett
JPS6035458B2 (ja) * 1980-08-02 1985-08-14 アイシン精機株式会社 刺しゆう枠

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8404056A1 *

Also Published As

Publication number Publication date
SU1373300A3 (ru) 1988-02-07
IT8467229A0 (it) 1984-03-12
DE3467860D1 (en) 1988-01-14
EP0143796B1 (fr) 1987-12-02
IT1178875B (it) 1987-09-16
JPS60501048A (ja) 1985-07-11
FI831239A0 (fi) 1983-04-13
WO1984004056A1 (fr) 1984-10-25
IT8467229A1 (it) 1985-09-12

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