• 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 comprising a handle portion, whose upper end is provided with a press knob with shaft and inside which a piston rod is fitted. To the bottom end of the piston rod is connected a piston or, by the intermediate of a common actuating means of the pistons, several pistons and, for each piston, a cylinder part, which is fastened to the frame construction of the handle portion. The piston rod and the press knob shaft, which are parallel to each other, are placed at a distance from each other, and their surfaces facing each other are shaped as jointly operative with a cogwheel or friction wheel fitted between them and journalled on the handle portion by means of a shaft. Then, when the press knob is depressed, by the intermediate of the press knob shaft, of the cogwheel or friction wheel, and of the piston rod, the piston or the pistons in each cylinder portion can be shifted from the lower position into the upper position so as to suck liquid into the tip vessel connected to each cylinder portion. A freewheel is stationarily fitted inside the cogwheel or friction wheel, or a freewheel is fitted inside an operating means mounted on the shaft of the cogwheel or friction wheel, such as, for example, a dosage lever. The freewheel is coupled to its shaft in one direction so that, when the shaft is turned back and forth by means of the operating means, such as the dosage lever mounted on the shaft, repeated depressions of the operating means, such as the dosage lever, produce shifting of the piston rod stepwise downwards while the pivoting angle of the operating means, such as the dosage lever, determines the magnitude of the dose to be removed at a time from the tip vessel or tip vessels.
    公开号:SU1075950A3
    申请号:SU802976306
    申请日:1980-08-29
    公开日:1984-02-23
    发明作者:А.Суованиеми Осмо；Тейвамаки Юкка
    申请人:Коммандииттиихтие Финнпипетте Осмо А.Суованиеми (Фирма)；
    IPC主号:
    专利说明:

     The invention relates to laboratory KiWHM laboratory pipettes and can be used in laboratory practice to measure doses of fluid. A well-known pipette containing a vertical case- / internal-shaped frame; a common drive sleeve located in the case; cylinders with working conical surfaces, on which interchangeable tips are mounted on the bottom part of the case; sleeve as well a friend enters the cylinders, a hollow handle mounted on the housing, placed in the handle along the axis of the housing and connected at one end to the drive sleeve of the rams, the other end of which is connected to the trailing element, on the surface of the latter has a toothed rake which engages mounted on the axis of the gear with another gear rack, made on the shaft, placed in the cylindrical channel of the handle l. The known pipette is characterized by insufficient metering accuracy due to unequal quantities of the dispensed doses. The purpose of the invention is to increase the dosage by equilibrium displacement of the drive element and the stem. The goal is achieved - the pipette containing a vertical case, made in the frame, a common drive sleeve located in the case, mounted in the part of the case under the sleeve cylinders with working conical surfaces, on which replaceable tips, pistons, are mounted the ends of which are fixed in the drive sleeve, and the others enter the cylinders, a hollow handle mounted on the housing, placed in the handle along the axis of the housing and connected to one end of the drive sleeve by a rod, the other end of which is connected to the The water element on the surface of the latter has a toothed rack, which engages by means of a gear wheel mounted on an axis, with another toothed rack arranged on a shaft placed in the cylindrical channel of the handle, equipped with an overrunning clutch placed:. on the axis inside the gear, an additional metering mechanism mounted coaxially with the coupling so that it can be rotated about the axis, and rotation limiters of the additional metering mechanism mounted on the upper part of the handle. At the same time, an additional dosing mechanism is made in the form of an axis of a tl-shaped lever consisting of upper, lower and annular parts, in the lower of which there is a groove with a compression spring placed in it. In order to be able to continuously adjust the dose amount, the rotation limiters are made stepwise and moveable by means of a screw. 1. shows the proposed pipette, a general view; in Fig.2 a section aa in fig 1; on fig.Z dispensing mechanism; Fig.4 gear wheel with overrunning clutch; Figures 5-7 illustrate embodiments of the metering mechanism with turn stops. The four-channel type pipette contains a housing made in the form of a frame 1, a common drive sleeve 2 located in the housing, cylinders 3 fixed in the lower part of the housing with working conical surfaces 4 on which replaceable tips 5 are mounted, pistons b, one ends of which are fixed in the drive sleeve 2, and the others are included in the CylinderEI, a hollow handle 7 mounted on the housing on a hole 6ei rod 8 located along the axis of the housing and the handle, the drive element 9 with a rack 10, which engages by means of axes 11 and 3 bchatogo wheel 12 on the other rack 13 formed on the shaft 14 with the pressing head 15, the shaft 14 and drive element are arranged parallel to one another. Instead of gear racks, the surfaces can be flat, in which case the gear is replaced with friction ones. An overrunning clutch (figure 4) is installed inside the gear rack 12 on the axle 11, so that the axis can freely rotate inside the overrunning clutch 16 and the gear wheel 12. On the ogg 11, next to the gear wheel 12, there is a metering mechanism, designed as a lever 17 covering the axis 11, and consisting of the upper 18, lower 19 and annular 20 parts, in the lower part of which groove 21 is made with retaining spring 22 and limiters 23. The pipette works as follows. When you press the pressure head 15, the shaft 14 moves down, the rack and pinion 13 on your 14 leads to
    rotation of the gear wheel 12, which in turn transmits atoms to the gear rack 10, thereby raising the piston rod 8. When the piston rod 8 rises, it moves the drive sleeve 2 of the pistons 6, resulting in suction of the tips 5 mounted on the working conical surfaces x 4,
    When further on the metering mechanism is required, its lower part 19 is separated from the restrictor 23 and the spring 22 is compressed. In this case, the lever 17 engages with the axle 11 and it begins to rotate until the upper part 18 of the gearbox 17 reaches the lower limiter 23. When the axle 11 is rotated, the clutch 16 engages the axle and at the same time the gear wheel 12 which further displaces the toothed rails 10 and 13 by a step corresponding to the amount of compression of the upper part 18 of the lever 17.
    Gear rack 10, rigidly connected to. the piston ASH 6 moves them down a corresponding distance when pressing the upper part 18. In this case, the liquid moves from the tips 5, respectively, by a step of wounds 6. When the upper part 18 of the lever 17 again rises to the upper position, axis 11 rotates with the lever.
    However, the overrunning clutch 16 and the gear wheel 12 do not rotate with the axle 11, since movement in the direction of release of the overrunning clutch 16 occurs. Under these circumstances, when the upper part 18 of the lever 17 moves up, the pistons 6 do not move.
    The movement of the upper part 18 back and forth can be repeated several times, the more coarse displacement of the pistons 6 is created downwards and, accordingly, the liquid moves from the tips 5 in exactly equal quantities. When the tips 5 are again filled with liquid, the head 15 N is pressed 1 and the pistons 6 are raised up by means of a gear 12 and a piston rod 8. The gear 12 also rotates the freewheel 16 and axis 11, but the spring 22 1 lowers the lower part 19 the lever 17 to the stop 23, the annular part 20 of the lever 17 does not press on the axis 11, but allows it to rotate freely inside the lever 17. Thus, during the loading of the tips 5, the lever 17 does not cause friction.
    The proposed multi-step pipette may have several options, mainly relative to the location and direction of the gear wheel 12, the overrunning clutch 16, the lever 17 and other elements, but they do not change the principle of the Pipette, which is based on the operation of the overrunning clutch, the metering mechanism and limiters.
    Figure 5 shows a variant of the pipette, 9 of which the direction of movement of the rapag 17 differs from that described above. In this embodiment, the limiter p & & b / & t1 of the lever 17 consists of an screw 24, by means of which the amount of liquid that is dosed can be adjusted or adjusted. Instead of the screw 24. it is possible. use also restrictive jwcK, slider, or adjustment: plate 25 (fig.be ..:
    The adjustment or alignment of the south ba is also achieved by adjusting the upper limiter 23 by the & schen of the lower part 19 of the lever 17 (Fig. 7).
    A screw 26 is mounted on the upper end of the handle 7 of the pipette and presses a. The limiting disk or the limiting unit 27 down. The spring 28 presses the restriction assembly 27 in the upward direction to the screw 26, i.e. the rotation of the screw 26 can be made that the restriction assembly 2T moves exactly in the upward and downward direction. The lower part 19 of the lever 11, the turn, rests on the limiting unit 27, so that the upper position of the lever 1 is determined by turning the screw 26,
    The proposed pipette allows .. to carry out dosing equal to doses, resulting in improved accuracy.
    n
    1
    TO
    No
    25
    权利要求:
    Claims (3)
    [1]
    1. PIPETTE, containing a vertical case made in the form of a frame, a common drive sleeve located in the case, cylinders with working conical surfaces fixed on the lower part of the case under the sleeve, on which replaceable tips, pistons are mounted, one ends of which are fixed in the drive sleeve, while others are included in the cylinder, a hollow handle mounted on the housing, placed in the handle along the axis of the housing and connected at one end to the drive sleeve by a rod, the other end of which is connected to the straight element, on the surface of the latter there is a gear rack engaged by means of a gear mounted on the axis of the gear with another gear rack made on a shaft located in the cylindrical channel of the handle, characterized in that, in order to increase the metering accuracy by equating the displacement of the drive element and the rod, it equipped with an overrunning clutch located on an axis inside the gear wheel, additional * with a metering mechanism mounted coaxially with the clutch with the possibility of rotation about the axis, * and additional rotation limiters body dosing mechanism, fortified in the upper part of the handle. ''
    [2]
    2. The pipette according to claim 1, characterized. the fact that the additional metering mechanism is made in the form of a U-shaped lever covering the axis, consisting of upper, lower and end parts, in the lower of which there is a groove with a pressing spring located in it.
    [3]
    3. The pipette according to claim 1, characterized in that, in order to continuously adjust the dose, the rotation limiters are made stepwise and mounted with the possibility of movement by means of a screw.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1075950A3|1984-02-23|Pipet
    US4096751A|1978-06-27|Hand-held micropipettor with fluid transfer volume adjustment mechanism
    US4096750A|1978-06-27|Hand-held micropipettor with fluid transfer volume adjustment mechanism
    US4470317A|1984-09-11|Pipetting device
    US4273257A|1981-06-16|Jar mounted pipettor
    US4406170A|1983-09-27|Repeating pipetting device
    US4415101A|1983-11-15|Incremental liquid dispensing device
    RU2252408C2|2005-05-20|Adjustable hypodermic
    US4250755A|1981-02-17|Pipette
    SU1088650A3|1984-04-23|Multiple-batch pipet
    US4261205A|1981-04-14|Pipetting device
    GB2045641A|1980-11-05|Pipette
    SU1373300A3|1988-02-07|Metering pipette
    US4144761A|1979-03-20|Handpipette
    US4929428A|1990-05-29|Quantitative pipette
    US4591072A|1986-05-27|Repeating dispenser
    EP0055483B1|1985-08-14|Automatic pipettor employing an adjustable volume delivery pump
    US8631682B2|2014-01-21|Calibratable pipette
    FI57704B|1980-06-30|SERIEPIPETT
    SU1154779A1|1990-11-23|Plunger-type micropipette
    SU1242229A1|1986-07-07|Pipette batcher
    US3821898A|1974-07-02|Piston type flow meter
    SU1701364A1|1991-12-30|Pipette
    SU1660729A1|1991-07-07|Multiplex pipet
    SU964460A1|1982-10-07|Liquid batchmeter
    同族专利:
    公开号 | 公开日
    IT1128998B|1986-06-04|
    PL128006B1|1983-12-31|
    DE3028888A1|1981-03-19|
    IT8068336D0|1980-08-29|
    GB2057292A|1981-04-01|
    US4335621A|1982-06-22|
    FR2464460A1|1981-03-06|
    GB2057292B|1983-11-16|
    FI58875B|1981-01-30|
    PL226420A1|1981-05-22|
    JPS5637555A|1981-04-11|
    FR2464460B1|1986-02-21|
    DD160096A5|1983-05-04|
    FI58875C|1981-05-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1718596A|1927-08-08|1929-06-25|Arthur E Smith|Automatic syringe|
    US3122280A|1961-08-14|1964-02-25|Clay Adams Inc|Adjustable stroke liquid dispenser having yieldable aligning means|
    DE1209778B|1963-05-15|1966-01-27|Curt Firn|Suction and dosing device for pipettes|
    FR1412275A|1963-10-23|1965-09-24|Suction and dosing device for pipettes|
    US3321108A|1965-11-26|1967-05-23|William E Bowe|Printing ink dispenser|
    US3855868A|1972-02-10|1974-12-24|O Sudvaniemi|Multiple pipette|
    US4099548A|1976-08-25|1978-07-11|Oxford Laboratories Inc.|Hand-held pipette for repetitively dispensing precise volumes of liquid|
    US4096751A|1977-06-15|1978-06-27|Oxford Laboratories Inc.|Hand-held micropipettor with fluid transfer volume adjustment mechanism|
    US4096750A|1977-06-15|1978-06-27|Oxford Laboratories Inc.|Hand-held micropipettor with fluid transfer volume adjustment mechanism|US4565100A|1981-10-02|1986-01-21|Culture-Tek|Pipette device|
    DE3204178C2|1982-02-06|1986-03-20|Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg|Pipetting device|
    DE3224077C2|1982-02-16|1989-12-14|Data Packaging Corp., Cambridge, Mass., Us|
    FI831239A0|1983-04-13|1983-04-13|Labsystems Oy|DOSERINGSPIPETT|
    JPH054142B2|1984-03-27|1993-01-19|Nichiryoo Kk|
    GB2161398A|1984-07-11|1986-01-15|Scient Supplies M B|Pipette|
    US4779467A|1987-01-28|1988-10-25|Rainin Instrument Co., Inc.|Liquid-end assembly for multichannel air-displacement pipette|
    JP2701900B2|1988-12-20|1998-01-21|株式会社ニチリョー|Multi pipette|
    FI87739C|1990-05-04|1993-02-25|Biohit Oy|Pipette|
    DE4414744C1|1994-04-27|1995-11-02|Eppendorf Geraetebau Netheler|Repeater pipette|
    US5540889A|1994-05-11|1996-07-30|Whitehead Institute For Biomedical Research|Apparatus and method for a highly parallel pipetter|
    US6103198A|1997-09-24|2000-08-15|Sorenson Bioscience, Inc.|Micropipette tip strip and method|
    US6143252A|1999-04-12|2000-11-07|The Perkin-Elmer Corporation|Pipetting device with pipette tip for solid phase reactions|
    DE102010038414A1|2010-07-26|2012-01-26|Hamilton Bonaduz Ag|Pipetting device with throttle point in the pipetting channel|
    DE102014109345A1|2014-07-04|2016-01-07|Eppendorf Ag|Pipette for actuating a syringe|
    EP3260822B1|2016-06-21|2020-07-15|Eppendorf Ag|Multi-channel spray for use with a metering device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI792709A|FI58875C|1979-08-31|1979-08-31|pipette|
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