EP0090207A2 - Appareil pour le dosage sans contact de liquides - Google Patents

Appareil pour le dosage sans contact de liquides Download PDF

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Publication number
EP0090207A2
EP0090207A2 EP83102228A EP83102228A EP0090207A2 EP 0090207 A2 EP0090207 A2 EP 0090207A2 EP 83102228 A EP83102228 A EP 83102228A EP 83102228 A EP83102228 A EP 83102228A EP 0090207 A2 EP0090207 A2 EP 0090207A2
Authority
EP
European Patent Office
Prior art keywords
piston
sleeve
hollow cylinder
liquid
spring
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.)
Withdrawn
Application number
EP83102228A
Other languages
German (de)
English (en)
Other versions
EP0090207A3 (fr
Inventor
Wolf-Dietrich Dr. Herold
Oswald Dr. Gasser
Günter Pieper
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.)
SIH Stiftung and Co Industrie Holding KG
Original Assignee
Espe Fabrik Pharmazeutischer Praeparate GmbH
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 Espe Fabrik Pharmazeutischer Praeparate GmbH filed Critical Espe Fabrik Pharmazeutischer Praeparate GmbH
Publication of EP0090207A2 publication Critical patent/EP0090207A2/fr
Publication of EP0090207A3 publication Critical patent/EP0090207A3/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a device for contactless metering of liquids as specified in the preamble of claim 1.
  • metering syringes Devices of this type, which are also referred to as "metering syringes", are known per se.
  • metering syringes For example, from DE-PS 1 090 449 and from DE-AS 1 291 142 such metering devices are known in which a piston is advanced in a hollow cylinder against the pressure of a spring and the liquid is drawn up in that due to the spring action the piston moves back to its original position. The liquid is drawn in contactlessly in the sense that the liquid drawn up does not touch the piston and only reaches a height of rise that ends before the range of movement of the piston. The possible movement of the piston is limited by stops, so that a fixed, predetermined volume of liquid is drawn up with each actuation.
  • the object of the present invention is accordingly to provide a metering device for the contactless metering of solid quantities of liquids, in which the number of components is kept as small as possible and which allows the metered quantity to be changed by replacing a part.
  • the device according to the invention consists of a syringe-shaped body which has a hollow cylinder at its upper end. This channel connects to its hollow cylinder, which emerges in the front, needle-like end of the body 1.
  • the hollow cylinder is closed at its upper end with a seal made of elastic material.
  • a piston is inserted through this seal into this hollow cylinder and is movable in the axial direction between two positions, these positions being determined by stops which are attached to the outside of the body.
  • the piston is attached centrally in a sleeve that extends over the hollow cylinder.
  • a spring is attached to the piston, which is supported on the bottom of the sleeve and on the upper end of the hollow cylinder. When the piston is pushed into the hollow cylinder, the spring is compressed, so that after the sleeve is released, together with the piston, it moves back into the starting position defined by a stop.
  • the feed of the piston is also limited by a stop.
  • the piston and the sleeve are formed in one piece, so that the device according to the invention consists of a total of 4 parts, namely the syringe-like body, the seal arranged at the upper end of this body, the component formed from the sleeve and piston and the one on the piston attached spring.
  • the seal sealing the hollow cylinder is made of elastic material and is dimensioned such that it is seated on the piston with a pressure acting in the radial direction. This makes it possible to replace the component consisting of the sleeve and the piston with another in which the piston has a different diameter.
  • the elasticity of the seal is sufficient so that it seals it even with a reduced diameter of the piston.
  • the sleeve has at the end which is pushed over the hollow cylinder, two mutually opposite longitudinal slots, so that the lower end of the sleeve can be elastically expanded and pushed over the stops located on the outside of the hollow cylinder .
  • the device according to the invention consists of an elongated body 1 which is tapered at one end and through which a channel 2 extends.
  • This channel 2 merges into a hollow cylinder 4, which is formed at the other end of the body 1.
  • the hollow cylinder 4 is extended to an annular groove 9, in which a seal 7 made of elastic material is inserted.
  • the piston 5 is pushed through this seal 7 and is displaceable in the hollow cylinder 4.
  • a sleeve 8 is integral with this piston 5 formed, which surrounds the piston 5 centrally symmetrical.
  • the clear width of the sleeve is greater than or equal to the clear width of the projection 13.
  • the sleeve 8 has an inward projection 11, so that the movement of the sleeve 8 in the axial direction is limited by the stops 10 and 13 .
  • a spring 6 is slipped over the piston 5, which is supported on the bottom of the sleeve and on the end of the hollow cylinder 4, optionally on the seal 7.
  • the open end of the channel 2 is immersed in liquid, the sleeve 8 and with it the piston 5 are moved against the pressure of the spring 6 in the direction of the stop 10. After releasing the sleeve, the sleeve and with it the piston 5 move back into the starting position under the pressure of the spring, so that liquid is sucked in through the channel 2.
  • the amount sucked in is determined by the volume displaced when the piston is displaced, i.e. by the -Distance between the stops 10 and 13, and by the diameter of the piston 5.
  • FIG. 2 shows a modified embodiment in which, compared to FIG. 1, the component comprising the piston 5 and the sleeve 8 is replaced by another, in which the piston 5 has a reduced diameter.
  • a smaller volume is thus displaced when the piston is pushed in, so that subsequently when the sleeve returns into its. Starting position even a smaller amount of liquid is sucked in.
  • the seal 7 located in the annular groove 9 is so elastic and dimensioned that it also lies sealingly against a piston of reduced thickness. Accordingly, it is possible to change the metered quantity in the device according to the invention by replacing the component with the sleeve 8 and the piston 5.
  • FIG. 3 shows a side view of the device according to the invention. It can be seen that the sleeve. 8 is provided with slots 14 at the end which is pushed over the hollow cylinder 4. Because of these slots 14, the relevant end of the sleeve 8 can be slightly bent open, so that the inward, ring-like projection 11 in the sleeve can be pushed over the corresponding projection 13 on the outside of the hollow cylinder 4 (Fig. 1). The slots 14 thus also make it easier to replace the component consisting of the sleeve 8 and the piston S, so that the metered amount can accordingly be varied slightly.

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Measuring Volume Flow (AREA)
EP83102228A 1982-04-02 1983-03-07 Appareil pour le dosage sans contact de liquides Withdrawn EP0090207A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3212378A DE3212378A1 (de) 1982-04-02 1982-04-02 Vorrichtung zum beruehrungslosen dosieren von fluessigkeiten
DE3212378 1982-04-02

Publications (2)

Publication Number Publication Date
EP0090207A2 true EP0090207A2 (fr) 1983-10-05
EP0090207A3 EP0090207A3 (fr) 1986-01-22

Family

ID=6160126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102228A Withdrawn EP0090207A3 (fr) 1982-04-02 1983-03-07 Appareil pour le dosage sans contact de liquides

Country Status (6)

Country Link
US (1) US4464941A (fr)
EP (1) EP0090207A3 (fr)
JP (1) JPS58223445A (fr)
AU (1) AU1246783A (fr)
CA (1) CA1179301A (fr)
DE (1) DE3212378A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012121879A1 (fr) * 2011-02-22 2012-09-13 Rainin Instrument, Llc Pipette et embout d'étanchéité

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713060A (en) * 1986-06-20 1987-12-15 Becton, Dickinson And Company Syringe assembly
US5065690A (en) * 1990-08-27 1991-11-19 Bontempo Donald T Swimming pool leak detector
US6338200B1 (en) 1999-10-08 2002-01-15 Baxa Corporation Syringe dose identification system
DE10011235C2 (de) * 2000-03-08 2002-08-08 Max Planck Gesellschaft Ausstechvorrichtung zur Probenaufnahme und Verfahren zur Probenaufnahme
US8900526B2 (en) * 2008-04-08 2014-12-02 Socorex Isba S.A. Joint for device for metering liquids
US10159971B2 (en) * 2015-05-03 2018-12-25 Clear Labs Inc. Apparatus and method for economic, fast and easy sampling of food and environmental samples
CN113000084B (zh) * 2021-02-04 2023-05-26 李福祥 一种用于人体流感疫苗检测的控量添加装置
CN116295703B (zh) * 2023-05-16 2023-08-04 西安交通大学医学院第一附属医院 一种实验量筒

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493795A (fr) *
US2705494A (en) * 1953-10-01 1955-04-05 Kopp Scient Inc Operating device for syringe or pipet
US2798647A (en) * 1954-05-11 1957-07-09 Clay Adams Inc Pipette
US3334788A (en) * 1963-08-13 1967-08-08 Clark H Hamilton Syringe for chromatographic analyses
DE2632970A1 (de) * 1976-07-22 1978-01-26 Merck Patent Gmbh Geraet zur wiederholten reproduzierbaren abgabe von bestimmten variierbaren volumenmengen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792834A (en) * 1955-09-22 1957-05-21 Scientific Industries Operating device for syringe or pipet
US3232117A (en) * 1962-09-14 1966-02-01 Roger Gilmont Instr Inc Micrometer buret
US3730389A (en) * 1971-06-22 1973-05-01 Precision Sampling Corp Syringe
GB1510081A (en) * 1976-03-04 1978-05-10 Atkin R Pipettes
GB2021971B (en) * 1978-05-25 1982-11-03 Hearse D J Piperting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493795A (fr) *
US2705494A (en) * 1953-10-01 1955-04-05 Kopp Scient Inc Operating device for syringe or pipet
US2798647A (en) * 1954-05-11 1957-07-09 Clay Adams Inc Pipette
US3334788A (en) * 1963-08-13 1967-08-08 Clark H Hamilton Syringe for chromatographic analyses
DE2632970A1 (de) * 1976-07-22 1978-01-26 Merck Patent Gmbh Geraet zur wiederholten reproduzierbaren abgabe von bestimmten variierbaren volumenmengen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012121879A1 (fr) * 2011-02-22 2012-09-13 Rainin Instrument, Llc Pipette et embout d'étanchéité

Also Published As

Publication number Publication date
AU1246783A (en) 1983-10-06
CA1179301A (fr) 1984-12-11
US4464941A (en) 1984-08-14
DE3212378A1 (de) 1983-10-13
EP0090207A3 (fr) 1986-01-22
JPS58223445A (ja) 1983-12-26

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19841107

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860624

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GASSER, OSWALD, DR.

Inventor name: HEROLD, WOLF-DIETRICH, DR.

Inventor name: PIEPER, GUENTER