• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pipette which is provided with a piston, with a toothed rack connected with the piston, with a striking pin resting against the toothed rack, and with a dosage lever mounted on the striking pin. By depressing the lever, the filled pipette can be emptied as successive doses of specified magnitude. The pipette is additionally provided with a lifting lever (20) placed at the side of the toothing, the distance of the said lever from the end of the toothed rack being adjustable (24) as desired and the said lever permitting the striking pin to push the toothed rack over a specified distance only. In this way, it is possible to adjust the magnitude of the emptying step as desired. Moreover, the toothed rack is provided with a second toothing (5), a cogwheel (7) resting against it and, at the other side, resting against a second toothed rack (11), whose top end is provided with a press knob (12). By pressing this knob downwards, the toothed dosage rack with its piston is shifted to its upper position, and the pipette is filled.
    公开号:SU1373300A3
    申请号:SU843824685
    申请日:1984-12-12
    公开日:1988-02-07
    发明作者:Фагерстедт Микаель；Каски Эркки；Тервамяки Юкка
    申请人:Лабсистемз Ой (Фирма)；
    IPC主号:
    专利说明:

    00

    with so

    C / J
    The invention relates to laboratory pipette designs and can be used in laboratory practice for metering doses of fluid.
    The purpose of the invention is to simplify the dosing process by allowing one-handed use.
    FIG. Figure 1 shows the dosing pipette, general view, incision; FIG. 2 is a section A-A in FIG. one; on fi1. 3 — Detail of the lower end of the pipette with a series of tips.
    The pipette contains an elongated holder 1, at the lower end of which there is a cylinder 2 in which a piston 3 is mounted. The cylinder 2 can be fixed to the holder 1 by means of, for example, a bayonet coupling. The upper end of the piston 3 is attached parallel to the holder 1 of the rack bar 4 for dosing with two rows of teeth 5 and 6 for moving and dosing, respectively. To the row of teeth 6 for metering by spring 7, the hammer 8, mounted on the lever 9, is located on the axis 10 located in the holder. In addition, the lever 9 is connected with the spring 11, which seeks to keep the lever 9 in the upper position. The stop of the striker 8 in the lower position is provided by the limiter 12. The gear wheel 14 mounted on the axis 13 interacts with a number of teeth 5 of the rack 4 for metering. On the other hand, the gear wheel 14 interacts with the gear rack 15, on the upper end of which a push handle 16 is mounted.
    An elastic lifting lever 17 with a cam 18 is installed on the side of teeth and pins 6 of the toothed rack 4 to retract the impact 8 from the teeth and pins 6 when lifting the lever 9. The upper end of the lifting lever 17 is fitted with a guide pin 19 installed in the guide groove 20, made in the adjusting wheel 21, which is installed on the axis 22.
    The upper end of the toothed rack 4 is also provided with a cam 23, which, when the toothed rack is approaching the lower position, shifts the lifting lever 17 toward the striker 8.
    0
    five
    0 5 0 s 0
    d
    0
    five
    The pipette works as follows.
    At the moment when pbPiar 9 is in the upper position and, therefore, the drummer 8 is retracted from the row of teeth 6, and the piston 3 occupies the lower position in the cylinder 2, the handle 16 is pressed, resulting in rotation of the gear 14, which raises the toothed rack 4, and at the same time the piston in cylinder 2. Thus, vacuum is created in cylinder 2 and the cylinder is filled with liquid.
    After the cylinder 2 is completely filled, the handle 16 is pushed to the limit, and the dosing procedure can be started using the lever 9. When the metering lever 9 is pressed, the spring 7 presses the hammer 8 into the teeth 6, as a result of which the hammer 8 begins to push the rack 4 and the piston 3 down until the hammer 8 rests against the stop 12 and stops. After removing the force acting on the metering lever 9, the spring 11 returns it to the upper position. In this case, the striker 8 must slip over the row of teeth 6 and take a position close to its upper position, from which it is retracted from the teeth 6 by means of a cam 18 of an elastic lifting lever 17.
    The metering operation may be repeated until the rack 4 and the piston 3 are in their lower positions. At the same time, the cam 23 mounted on the upper end of the rack 4 is brought into contact with the lifting lever 17 and lifts it to the height of the teeth 6. On the other hand, the hammer 8 is moved away from the rod by a cam 18 of the lifting lever 17 to prevent the contact of the drummer with teeth 6 when the lever 9 is pressed again for dosing. This eliminates the impact of the piston 3 on the bottom of the cylinder 2, and at the same time the inaccuracy of the dosage of the last portion.
    When the adjusting wheel 21 is rotated using the guide groove 20 and the pin 19, the lifting lever 17 is moved up or down, resulting in a shift of the cam 18 mounted on the lower end of the lifting lever, which determines the amount of movement of the striker 8 without contact with a number of teeth 6, those. skipping 1–4 or more teeth with each press of the metering lever 9. In this way, one-, two-, three, or fourfold dose changes are achieved.
    In the embodiment shown in FIG. 1 and 2 pipette rows of teeth 5 and 6 are installed one after the other.
    权利要求:
    Claims (2)
    [1]
    1. A metering pipette comprising a holder, a cylinder attached thereto, a piston mounted in the cylinder, connected to a metering rod, having a number of teeth for metering and a number of teeth to move it, a gear bar with a pressure element for filling, a gear wheel, interacting with the teeth of the rails, fixed in the holder
    nineteen
    0
    five
    0
    a metering lever with a hammer that interacts with the metering teeth of the lath dL dosing, characterized in that, in order to simplify the dosing process by allowing one-handed use, it is provided with a lifting lever installed along the dosing bar having a cam at one end, and on the opposite side, an adjusting means for moving the lever along the rail, placed under the drummer, metering this lever, the metering rail is provided with a cam located at its end, and a row of teeth on it are full of succession.
    [2]
    2. A pipette according to Claim 1, characterized in that the pressure element is made in the form of a lever fixed at one end on the filling rail.
    - rrr.rr.rrl FIG. one
    FIG. 2
    Fig.Z
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1373300A3|1988-02-07|Metering pipette
    US4406170A|1983-09-27|Repeating pipetting device
    SU845757A3|1981-07-07|Pipet
    US4096751A|1978-06-27|Hand-held micropipettor with fluid transfer volume adjustment mechanism
    US3918308A|1975-11-11|Liquid transfer pipetting device with a tip ejector
    DE2304473C2|1983-01-05|Multiple pipette
    FI60138B|1981-08-31|pipette
    US3302462A|1967-02-07|Pipetting device with stop mechanism
    KR100712021B1|2007-04-27|Pipette device with tip ejector utilizing stored energy
    JPH0623283A|1994-02-01|Pipette with tip remover
    CA1259285A|1989-09-12|Dispenser for the individual dispensing in portionsof tablets, pastes or the like
    US4415101A|1983-11-15|Incremental liquid dispensing device
    FI58875C|1981-05-11|pipette
    US5879633A|1999-03-09|Ratchet pipette
    GB2045641A|1980-11-05|Pipette
    EA016547B1|2012-05-30|Device for filling cigarette tubes with tobacco
    US4467942A|1984-08-28|Repeating dispenser
    GB1566791A|1980-05-08|Pipette
    US4356909A|1982-11-02|Fraction collector
    US4042145A|1977-08-16|Sensitivity disc dispenser with tamper mechanism
    GB1597336A|1981-09-03|Micropipettors
    FI77166B|1988-10-31|DOSERINGSPIPETT.
    JPH05305998A|1993-11-19|Lifting device of variable strokes
    EP0695220B1|1998-09-02|Piston pipette
    US5072788A|1991-12-17|Catalytic converter tube locator and cleaner
    同族专利:
    公开号 | 公开日
    WO1984004056A1|1984-10-25|
    DE3467860D1|1988-01-14|
    JPS60501048A|1985-07-11|
    IT1178875B|1987-09-16|
    EP0143796B1|1987-12-02|
    EP0143796A1|1985-06-12|
    IT8467229D0|1984-03-12|
    FI831239A0|1983-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4099548A|1976-08-25|1978-07-11|Oxford Laboratories Inc.|Hand-held pipette for repetitively dispensing precise volumes of liquid|
    FI60137C|1979-03-23|1981-12-10|Suovaniemi Finnpipette|pipette|
    DE2926691C2|1979-07-02|1983-05-26|Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg|Repeater pipette|
    FI58875C|1979-08-31|1981-05-11|Suovaniemi Finnpipette|pipette|
    JPS6035458B2|1980-08-02|1985-08-14|Aisin Seiki|US4728501A|1984-07-27|1988-03-01|Minoru Atake|Adjustable liquid sampling apparatus|
    US4929428A|1988-02-19|1990-05-29|Fuji Photo Film Co., Ltd.|Quantitative pipette|
    DE4141608C2|1991-12-17|1993-12-02|Eppendorf Geraetebau Netheler|Pipetting device|
    FI921648A0|1992-04-13|1992-04-13|Labsystems Oy|STEGPIPETT.|
    US5364596A|1992-12-01|1994-11-15|Rainin Instrument Co., Inc.|Manual pipette with plunger velocity governor, home position latch and trigger release|
    FI931806A0|1993-04-21|1993-04-21|Labsystems Oy|KOLVPIPETT|
    DE9415847U1|1994-09-30|1994-12-08|Ritter Ralf|Repeater pipette|
    FI961649A0|1996-04-15|1996-04-15|Labsystems Oy|Spaerrpipett|
    FR2762671B1|1997-04-29|1999-07-16|D Autry Eric Marteau|DEVICE FOR DISPENSING SUCESIVE VOLUMES OF LIQUID WITH MAGNETIC HANGING ELEMENT|
    DE202010010942U1|2010-08-03|2011-11-08|Brand Gmbh + Co Kg|Pipette for a pipette system with pipette and syringe|
    GB2504333B|2012-07-26|2016-10-05|Ttp Labtech Ltd|Liquid dispensing device|
    DE102014109345A1|2014-07-04|2016-01-07|Eppendorf Ag|Pipette for actuating a syringe|
    BE1022747A9|2015-02-27|2016-10-03|Pilipili Productontwerp Nv|ACTIVATOR FOR BUILDING UP AND RELEASING A SURE POWER|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI831239A|FI831239A0|1983-04-13|1983-04-13|DOSERINGSPIPETT|
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