• 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 invention is a pipette which comprises a frame portion (1) shaped as a handle, a cylinder being formed inside the frame portion (1), as well as a piston (5) fitted into the cylinder by means of a seal ring (7), a piston rod (4) connected to the piston (3), as well as a press knob (5) with shaft (6), fitted at the upper end of the frame portion (1). Around the shaft (6) of the press knob (5), a calibration sleeve (9) is fitted by means of a threaded joint (8), by means of which calibration sleeve (9) the lower limit of the movement of the piston (3) during pipetting can be determined. According to the invention, the calibration sleeve (9), as surrounded by the mantle (10) of the hollow press knob (5) and by the upper part of the pipette frame (1), is placed at a distance both from the mantle (10) of the press knob (5) and from the inner face of the cover of the upper part of the pipette frame (1). Thereby the hollow press knob (5) and the pipette frame (1) form a cover protecting from conducted heat and allow a space of air around the adjustment and calibration sleeve (9).
    公开号:SU1165224A3
    申请号:SU823450443
    申请日:1982-06-15
    公开日:1985-06-30
    发明作者:Тервамяки Юкка；Фагерштедт Микаель；Кукка Аарре；Каски Эркки
    申请人:Лабсистемз Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to laboratory pipette designs and can be used in laboratory practice to measure accurate doses of a liquid. Closest to the invention is a pipette comprising a housing, a stepped piston with a shaft and a button at its upper end, located axially in the housing, a lower step of the seal at the bottom of the housing, an annular flange for limiting the upper position of the piston, a helical spring wrapped around 6th between the annular flange and the lower part of the housing, calibrating the sleeve, mounted on the threads around the shaft, and a stop for fixing the lower position of the piston, filled to the inner surface of the housing, while the button pipette ki mounted on the shaft without a gap (rolled) Ij. However, when using such a pipette, the warmth of the operator’s hand causes an expansion of the pipette body, in which the regulating and calibrating elements are strengthened, as a result, the calibration accuracy is relatively unreliable. The aim of the invention is to improve the accuracy of the calibration. This goal is achieved by the fact that, in a medicinal certificate containing a body, a stepped piston with a shaft and a button on its upper end, located axially in the body, the lower stage is fixed in the lower part of the body, an annular flange for limiting the upper position of the piston, a helical spring, an entwining piston between an annular flange and a lower part of the housing, calibrating a sleeve fixed to the threads around the shaft, and a limiter for fixing the lower position of the piston, made on the inner surface of the housing, the button is designed as the hollow cap and is movably mounted in the body, and the side walls of the cap are located at a distance from the gage sleeve. In addition, the calibrating sleeve has a limiting flange, formed in its lower part, an annular flange resting on the limiting flange, the ring mounted in the vertex of the calibrating sleeve, and a coil spring between the annular ring and the annular flange. The cap is mounted on the shaft with the possibility of removal. The cap is fixedly attached to the alu, on the outer surface of the ring there are vertical grooves, and on the inner surface of the case-cap there are vertical wedges which engage with the grooves of the ring. The number of cap wedges is two, and they are located opposite each other e) ug. Fig. 1 shows a pipette with a calibrating device, general view, section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 - top part of the pipette, option; in fig. 6 locking gage sleeve; in fig. 7 is a cross-section of the FIG. 6. In case 1 there is a cylinder 2 in the form of a pipette handle, in which piston 3 is fastened by means of seal 4. Seal 4 is held in place in the recess by means of ring 5, reinforced seal 4, ring 5 is pressed down by coil spring 6, reinforced around the piston rod 7 between the ring 5 and the flange part 8 at the upper end of the piston rod 7. The removable vessel of the tip 9 is attached to the lower end of the tube of the tip 10 connected to the lower part of the cylinder 2 in the pipette body 1. At the upper end of the shaft 11, fixed on the upper end of the piston rod 7, a button 12 is installed in the form of a hollow cap. The sleeve 13 is reinforced with a thread (adjusting) in the lower part of the shaft 11. Inside the pipette body 1 there is an annular restriction flange 14, on the lower surface of which the sleeve 13 rests with its upper surface. In this case, the sleeve 13 together with the annular flange 14 defines the upper position of the piston 3. Inside the housing 1 of the pipette, longitudinal guides 15 are provided, and the sleeve 13 has recesses 16 corresponding to the guides 15, with the result that the guides 15 and the depressions 16. prevent rotation sleeve 13 relative to the body of the pipette, the tolerance of the axial sliding sleeve 13 inside the housing 1 (Fig. 1 and 4). At the upper end of the shaft 11 and 1et there is a calibration thread 17. The diameter and pitch of the calibration thread 17 can be either the adjustment thread (at the bottom of the shaft) or differ. Using the calibration thread 17, the calibration sleeve 18 is fastened around the shaft 11. The button 12 using the sleeve 18 determines the lower limit of the movement of the piston 3 during the pipette. Calibrating. The sleeve 18, surrounded by the hollow body of the button 12 and the upper part of the body of the pipette 1, is at a distance (from the body of the button 12 and from the inner surface of the shell of the upper part of the body 1 of the pipette. The floor of the button 1 and the body of the pipette 1 form a protective shell from the heat and create sufficient air clearance around the regulating and calibrating sleeve 18 For the secondary pipette movement, the ring flange is fixed in the annular gap between the calibrating sleeve 18 and the pipette 1 body around the calibrating sleeve 18. The annular flange 1 is pressed down to the limiting flange 20, placed on the lower part of the sleeve 18, using a coil spring 21 surrounding the sleeve 18 and reinforced between the annular flange 19 and the ring 22 attached to the vertical end of the calibrating sleeve 18. The ring 22 has a cut-out (Fig. 3) and since the ring 22 and the calibrating gill for 18 have connecting links 23 (Fig. 1), the ring 22 can easily be attached to the upper end of the sleeve 18 by simple pressing. A protrusion 24 is provided on the upper ring of the calibrating sleeve 18 (Fig. 3) facing the ring 22 on which the cutout is placed in the ring 22 when the ring is attached to the end of the gage sleeve 18. The protrusion 24 prevents the ring 22 from rotating relative to the sleeve 18. As a result, the calibration can be performed using the ring 22 by turning sleeves 18 around the shaft 11. It is advisable that the cylindrical outer surface of the ring 22 has grooves facilitating the rotation of the notch. Button 12 is connected by frictional connection with shaft 11 in order to facilitate recalibration of the pipette (Fig. 1 and 2). In such a pipette, the adjustment of the volume is carried out by rotating the button 12. The button 12 should be fixed to the shaft 11 without rotation (Fig. 2). When the pipette is calibrated, button 12 is first pulled off shaft II. Calibration can then be performed simply by using ring 22, turning sleeve 18 to the desired position clockwise or counterclockwise. The calibration sleeve 18 may be secured in place on the threads 17 of the shaft 11, for example, by means of a locking ring, lock nut, friction, gluing, soldering or compressing the calibration sleeve 18 and the shaft 11 to each other. The gage sleeve 18 is fixed to make it non-rotating relative to the shaft 11, and can be carried out using the button 12 (Fig. 6 and 7). Therefore, the button-12 must be attached to the shaft 11 without the possibility of rotation (Fig. 2). The outer surface of the ring 22 connected without rotation with the calibrating sleeve is provided with vertical grooves 25, and the inner surface of the housing of the button 12 has vertical wedges 26 connected to the grooves 25 and arranged as shown in FIG. 6 and 7. If the button 12 is removed, the calibration sleeve 18 can be rotated relative to the shaft 11 by hand using the ring 22, and the grooves 25 facilitate rotation. After calibration, the button 12 is put in place on the upper end of the shaft 11. The pipette works as follows. To adjust the volume of the pipette, button 12 rotates, causing shaft 11 to rotate inside sleeve 13 and shorten or lengthen the stroke of piston 3. When pressing button 12 with pipette thumb, the sleeve 13 moves away from the limiter flange 14 and the movement continues until the annular flange 19 does not rest against the upper surface of the limiting flange 14. If the button 12 continues to be pressed with a force that exceeds the compressive force of the spring 6, a so-called secondary movement occurs until the edge of the housing of the button 12 rests against the top Yu surface of the annular flange 19.
    FIG. 5 shows a variant of a pipette which does not have a secondary movement. In this case, inside the button 12 in the calibrating thread on the shaft 11 of the head only the calibrating sleeve 18 is threaded, as a result, when dripping from the pipette, the stationary restriction flange 26 at the upper end of the sleeve 18 defines em piston stroke length 3.
    Thus, in accordance with the invention, in a pipette, a calibrating device is mounted on the head shaft below the hollow head, separated from contact with the head body and the pipette body, so that an air gap is created around the regulating and calibrating device
    as a result, the heat cannot be held and cause expansion of the specified device. In addition, the pipette can easily be recalibrated by drawing the head out of its friction connection.
    The calibration tool of the invention may be used in pipettes that are either continuously or incrementally calibrated or calibrated to a fixed volume. A pipette may contain a so-called secondary movement for emptying the tip vessel or may not have a secondary movement, as is the case with so-called positive-moving pipettes.
    6-6
    fpus.
    cpus.6
    fig 7
    权利要求:
    Claims (3)
    [1]
    1. PIPET, comprising a housing, a stepped piston with a shaft and a button on its upper end, located axially in the housing, the lower stage of which is fixed in the lower part of the housing, an annular flange to limit the upper position of the piston, a spiral spring encircling the piston between the annular flange and the lower part of the housing, a calibrating sleeve mounted on a thread around the shaft; and a limiter for fixing the lower position of the piston, made on the inner surface of the housing, characterized in that, in order to increase the accuracy of calibration, the button is made in the form of a hollow cap and installed with the possibility of movement in the housing, and the side walls of the cap are located
    us on the distance from calibrating gil PS 2. Eyedropper P. 1, about t l and h and to- U and I with i that calibrating gil— behind has a restriction flange, you-
    filled in its lower part, an annular flange resting on a restrictive flange, a ring, reinforced-
    at the top of the calibrating guill PS AND spiral spring between ring tsom and roundabout flange.3. Pipette BY p. 1 and 2, from l and- h a Yu i am with I so that the cap
    mounted on a shaft with removable ability.
    [2]
    4. The pipette according to claims 1 and 2, is that the cap is fixedly attached to the shaft, vertical grooves are made on the outer surface of the ring, and vertical wedges are engaged on the inner surface of the cap body grooved rings.
    [3]
    5. A pipette according to Claim 4, with the fact that the number of wedges of the cap is two, and they are located opposite each other.
    SU „1165224
    I
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1165224A3|1985-06-30|Pipette
    US4554134A|1985-11-19|Pipette with adjustable volume
    SU1071211A3|1984-01-30|Variable capacity pipet
    US4805634A|1989-02-21|Adapter assembly for use with a cranial biosensor
    FI57539B|1980-05-30|PIPETT SOM KAN KALIBRERAS
    US4244091A|1981-01-13|Hose crimping apparatus
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    JP3168296B2|2001-05-21|Method for locking adjustment means of pipette and pipette
    JPH0811323B2|1996-02-07|Device for connecting two tool parts
    EP0153058A2|1985-08-28|Pipette with adjustable volume
    SU1099835A3|1984-06-23|Pipet
    EP0041318A1|1981-12-09|Pipette
    US4300643A|1981-11-17|Double core barrel
    US8631682B2|2014-01-21|Calibratable pipette
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    JP2622781B2|1997-06-18|Engine piston positioning and fixing device
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    SU961840A1|1982-09-30|Tool assembly to apparatus for direct extrusion of parts
    SU988754A1|1983-01-15|Device for limiting angle of inclination of load lifting machine
    SU688293A1|1979-09-30|Composite cutting tool
    SU1214941A1|1986-02-28|Threaded rod
    SU1199472A1|1985-12-23|Tool head
    SU756093A1|1980-08-15|Apparatus for securing removable part
    EP1321181A2|2003-06-25|Device for sealing a plurality of containers
    同族专利:
    公开号 | 公开日
    FI62470B|1982-09-30|
    US4466298A|1984-08-21|
    EP0067605A1|1982-12-22|
    HU186527B|1985-08-28|
    DD202397A5|1983-09-14|
    FI62470C|1983-01-10|
    JPS58254A|1983-01-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2711190C1|2017-01-03|2020-01-15|Иллюмина, Инк.|Sampling tube with built-in mixing piston head|US3261509A|1965-02-05|1966-07-19|Clay Adams Inc|Variable capacity dispensing device|
    DE2319175A1|1973-04-16|1974-10-31|Oxford Lab|DETAIL PISTON PIPETTE|
    US4054062A|1976-05-03|1977-10-18|Oxford Laboratories Inc.|Hand-held micropipettor with improved accuracy of liquid volumes transferred|
    DE2711124C2|1977-03-15|1979-05-10|Labora Mannheim Gmbh Fuer Labortechnik, 6800 Mannheim|Hand pipette|
    US4141251A|1978-02-15|1979-02-27|Nichiryo Co., Ltd.|Pipetting device|
    FI57543C|1978-06-02|1980-09-10|Suovaniemi Finnpipette|VOLUMREGLERBAR PIPETT|
    FI57542C|1978-06-02|1980-09-10|Suovaniemi Finnpipette|VOLUMREGLERBAR PIPETT|
    US4294125A|1980-04-24|1981-10-13|Lee Tsao Piao|Pipette controller with graduate reading plunger and lever assembly for gravity drainage|FI64752C|1982-06-29|1984-01-10|Labsystems Oy|VOLUME REGULATOR PIPETT|
    FR2549015B1|1983-07-13|1986-06-13|Oreal|DROPPER ASSEMBLY|
    FI844320A|1984-11-02|1986-05-03|Labsystems Oy|UTSPAEDNINGSDOSERINGSANORDNING.|
    GB2172218B|1985-02-15|1988-07-20|Rocket Of London Ltd|Pipetter tip for pipetters|
    US4824642A|1986-10-21|1989-04-25|Costar Corporation|Multi-channel pipetter|
    FR2607407B1|1986-11-27|1991-08-02|Marteau D Autry Eric|METHOD AND DEVICE FOR CALIBRATING A PIPETTE FOR SAMPLING AND DOSING|
    FI86812C|1991-01-07|1992-10-26|Labsystems Oy|Förträngningspipett|
    FI86969C|1991-02-05|1992-11-10|Biohit Oy|pipette|
    US5496523A|1994-05-06|1996-03-05|Sorenson Bioscience|Filtered micropipette tip for high/low volume pipettors|
    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|
    FI20002241A0|2000-10-11|2000-10-11|Labsystems Oy|Adjustable pipette|
    FI20031626A0|2003-11-10|2003-11-10|Thermo Electron Oy|Monivaihepipetti|
    US7175813B2|2003-12-31|2007-02-13|Rainin Instrument, Llc|Volume adjustable manual pipette with quick set volume adjustment|
    DE102008048252A1|2008-09-12|2010-04-15|Eppendorf Ag|pipetting|
    PL214640B1|2009-04-30|2013-08-30|Pz Htl Spolka Akcyjna|Stem assembly to be installed in the mechanical or electronic pipette|
    CN103080724B|2010-04-26|2016-04-13|电流感应器公司|Portable viscometer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI811915A|FI62470C|1981-06-17|1981-06-17|pipette|
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