• 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:
    The subject of the present invention is a pipette comprising a cylindrical handle portion (1), a frame portion (2) connected to same, in whose cylinder space a piston (3) is fitted for sucking liquid into, and removing liquid from, a tip (4) connected to the lower end of the frame portion (2) and functioning as a liquid container. The piston (3) is provided with two piston rods (8 and 9) fitted inside each other, each of them being at the upper end provided with a knob (16 and 17). Out of the said piston rods (8 and 9), the stroke of the inner, secondary piston rod (9) is longer than the stroke of the second piston rod (8), surrounding the first one. Moreover, the piston rods are prevented from rotating in relation to the handle portion (1). According to the invention, around the piston rod (9), a sleeve-shaped adjustment device (12) has been fitted by means of a threaded joint for the purpose of calibration of the pipette, while the adjustment device is placed in the chamber space of the upper end of the handle portion (1) and is supported by means of shoulders against the support portion (13) of the handle portion (1). The turning of the adjustment device (12) in relation to the piston rod (8) so as to adjust or calibrate the pipette has been arranged as taking place from outside the pipette by using the adjustment and calibration unit.
    公开号:SU1205751A3
    申请号:SU813291856
    申请日:1981-06-01
    公开日:1986-01-15
    发明作者:Суованиеми Осмо
    申请人:Лабсистемз Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the construction of pipettes and can be used in laboratory practice for measuring and weighing certain doses of solutions of chemical reagents and liquids under study.
    The purpose of the invention is to simplify and accelerate the calibration of the pipette.
    The drawing shows a pipette, a general view in section.
    The pipette consists of a cylindrical body 1, which is connected in the upper clean with a cylindrical handle 2, in the lower part with a tip 3. Inside the body 1 there is a piston 4. The seal between the body 1 and the piston 4 is made in the form of a sealing ring 5 to which the coil spring 6 pressed with pbmoschuyu 0-shaped support 7. The piston 4 is equipped with one installed inside the piston internal 8 and 9 external piston rods.
    The rods 8 and 9 have 10 and 11 respectively in the bristle section. The outer piston rod 9 has a longer stroke than the internal piston rod 8. The inner piston rod 8 is connected at the bottom with an adjustment unit 12 by means of a threaded connection. The flange 13 forms a support for the coil spring 6 and presses the piston 4 to the adjusting unit 12.
    The pipette has a calibrating sleeve 14 screwed on the outer piston.
    to
    standing up to its lower position. Then, while the pipette tip 3 is in the liquid, the piston 4 can be lifted over a distance of ((-in its upper position. When it doesn’t fit the pipette 4, the head 10 of the inner rod 8 of the piston 4 is pressed, causing the head 10 to go down the total distance (a + b). This total movement (a + b) is transmitted by adjusting unit 12 to the piston through the middle portion of the flange 13, resulting in a movement to drain the piston 4 5 longer than its movement to fill, what guarantees good discharge from a tip 3 pip There is a drop of liquid to be dripped.
    The pipette can be calibrated to specific volumes at the manufacturing stage using a calibrating sleeve 14, which is activated outside the pipette and connected to the piston rod 9 of the piston 4. In addition, the distance traveled by the inner piston rod 8 of the piston 4 located inside the piston rod 8 of the piston 4 can be adjusted by adjusting the node 12.
    When the adjustment is carried out with the aid of the gage sleeve 14 by turning it clockwise or counterclockwise, the rotation of the rod 9 of the piston 4 together with the unit is prevented by means of the guides 16 and the guide grooves 17. This
    20
    25
    thirty
     Es
    the rod 9, the upper tool placed in the cavity also prevents rotation
    The end of the handle 2 and fixed by means of a support sleeve 15 mounted on the end face of the handle 2. The upper part of the calibration sleeve 14 is made with a protrusion located above the end face of the support sleeve 15.
    The protrusions 16 are made on the inner surface of the handle 2, and on the surface of the external piston rod 9 there are directional grooves 17, which correspond to the direction of the handle 2,
    The pipette works as follows.
    When pipetting with the help of a pipette, the head 11 located in the upper part of the outer piston rod 9 of the piston 4 is pressed and it transmits movement through the brush 9 of the piston 4 and the adjusting unit 12 located in it to the piston 4 using the middle part of the flange 13. When filling the tip 3, the pipette head 11 is pressed on
    standing up to its lower position. Then, while the pipette tip 3 is in the liquid, the piston 4 can be lifted over a distance of ((-in its upper position. When it doesn’t fit the pipette 4, the head 10 of the inner rod 8 of the piston 4 is pressed, causing the head 10 to go down the total distance (a + b). This total movement (a + b) is transmitted by adjusting unit 12 to the piston through the middle portion of the flange 13, resulting in a movement to drain the piston 4 5 longer than its movement to fill, what guarantees good discharge from a tip 3 pip There is a drop of liquid to be dripped.
    The pipette can be calibrated to specific volumes at the manufacturing stage using a calibrating sleeve 14, which is activated outside the pipette and connected to the piston rod 9 of the piston 4. In addition, the distance traveled by the inner piston rod 8 of the piston 4 located inside the piston rod 8 of the piston 4 can be adjusted by adjusting the node 12.
    When the adjustment is carried out with the aid of the gage sleeve 14 by turning it clockwise or counterclockwise, the rotation of the rod 9 of the piston 4 together with the unit is prevented by means of the guides 16 and the guide grooves 17. This
    0
    five
    0
    with
    rod 9 piston 4 during dripping.
    The calibration sleeve 14 and the support sleeve 15 with the scale can be provided with scale marks to facilitate calibration and / or an indication of a specific volume. Such scale marks can be labeled, if necessary, to indicate a specific volume and / or a specific mass for a liquid with different specific weights. Scale bars can also be used so that with their help the required volume is adjusted for the pipette in a certain range of volumes.
    The invention is suitable for reversing the supply of drops, with etrm a larger amount of liquid is taken into the tip of the pipette than is removed from it. So, for example, filling the tip 3 of the pipette occurs so that the head 10 of the internal stem 8
    first lowers to its lower position, with the result that piston 4 is lowered down a full distance a and b, and then the liquid is sucked into tip 3 by moving piston 4 to its upper position a distance (a + b). In the step of merging the pipette tip 3, the head 11 is pressed
    to its lower position, with the result that the piston 4 is lowered down, distance o. The volume of fluid corresponding to the distance in the piston 4 is removed from the tip 3 of the pipette. In many cases, the reversing drip method will increase the accuracy AND reproducibility of the droplet delivery.
    权利要求:
    Claims (1)
    [1]
    PIPET, which includes a cylindrical body, a cylindrical handle and a tip, respectively mounted in the upper and lower parts of the body, a piston installed in the body, equipped with two piston rods installed inside each other and having a head at the upper end of the head, while the stroke of the internal piston rod is longer than the stroke external piston rod, a calibrating sleeve screwed onto an external piston rod located in the cavity of the upper end of the handle and fixed by means of a supporting sleeve mounted on the end face ki, characterized in that, in order to simplify and accelerate the calibration of the pipette, the upper part of the calibrating sleeve is made with a protrusion located above the end of the supporting sleeve, guide protrusions are made on the inner surface of the handle, and guides are made on _ "about the surface of the external piston rod ® grooves corresponding to the handle guides.
    SU .. ,, 1205751>
    类似技术:
    公开号 | 公开日 | 专利标题
    CA1052126A|1979-04-10|Method and apparatus for accurate pipetting of small liquid volumes
    US5348606A|1994-09-20|Method of making a multiple pipette sampler system
    US20040231438A1|2004-11-25|Pipetting module
    US3955930A|1976-05-11|Automatic dilutor having coupled diluent and reagent plungers
    SU1205751A3|1986-01-15|Dropper
    US5481900A|1996-01-09|Pipette system
    US3805998A|1974-04-23|Dispensing pipette
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    FI75431B|1988-02-29|ANORDNING FOER MAETNING AV SEDIMENTERINGSGRAD AV ROEDA BLODCELLER.
    US4210261A|1980-07-01|Controllable liquid dispenser
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    AU597104B2|1990-05-24|Multiple pipette sampler
    US3337095A|1967-08-22|Syringe for automatic proportioning
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    US20050213633A1|2005-09-29|Method for recording the boiling-point curve of liquids and device for carrying out said method
    US3675492A|1972-07-11|Measuring syringe
    US3921460A|1975-11-25|Precision liquid-handling instrument
    US4702393A|1987-10-27|Compensating diluter/dispenser
    JP2822352B2|1998-11-11|Replenishment device for writing, drafting or painting tools
    CN213286906U|2021-05-28|Dropping bottle
    CN108675249B|2019-08-30|A kind of continuous quick layered water flood well of solution
    CN211825878U|2020-10-30|Quantitative microsample injector for metrological verification
    SU1652870A2|1991-05-30|Liquid vapor metering device
    同族专利:
    公开号 | 公开日
    FI60359C|1982-01-11|
    EP0041318A1|1981-12-09|
    FI60359B|1981-09-30|
    JPS57174148A|1982-10-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2351402B1|1976-05-10|1981-03-20|Marteau Dautry Eric|
    FR2362385B2|1976-08-18|1982-12-17|Marteau Autry Eric|
    US4096751A|1977-06-15|1978-06-27|Oxford Laboratories Inc.|Hand-held micropipettor with fluid transfer volume adjustment mechanism|
    FI76710B|1978-09-08|1988-08-31|Osmo Antero Suovaniemi|Pipette.|FI64752C|1982-06-29|1984-01-10|Labsystems Oy|VOLUME REGULATOR PIPETT|
    GB2161398A|1984-07-11|1986-01-15|Scient Supplies M B|Pipette|
    ES2035210T3|1988-10-21|1993-04-16|Eppendorf-Netheler-Hinz Gmbh|DEVICE TO OPERATE PIPETTES.|
    DE4209620C1|1992-03-25|1993-12-16|Eppendorf Geraetebau Netheler|Method for correcting the volume error ïV in a pipetting system|
    DE10013511A1|2000-03-20|2001-10-11|Brand Gmbh & Co Kg|Multiple channel pipetting arrangement used for microtitration plates has pipette shafts each having a sealing receiver on the upper end with a plunger seal arranged in it|
    US7175813B2|2003-12-31|2007-02-13|Rainin Instrument, Llc|Volume adjustable manual pipette with quick set volume adjustment|
    FI20050340A0|2005-04-01|2005-04-01|Thermo Electron Oy|Calibratable pipette|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI801770A|FI60359C|1980-06-02|1980-06-02|pipette|
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