EP0855219B1 - Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät - Google Patents
Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät Download PDFInfo
- Publication number
- EP0855219B1 EP0855219B1 EP98100972A EP98100972A EP0855219B1 EP 0855219 B1 EP0855219 B1 EP 0855219B1 EP 98100972 A EP98100972 A EP 98100972A EP 98100972 A EP98100972 A EP 98100972A EP 0855219 B1 EP0855219 B1 EP 0855219B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder
- syringe
- support ring
- cylinder sleeve
- 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.)
- Expired - Lifetime
Links
Images
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 syringe made of plastic with a Piston-cylinder unit for a pipetting device, according to the generic term of claim 1.
- a syringe is from WO 9 426 332 A. known.
- Such syringes are conventionally made by injection molding made of plastic. It is known to be in the wall to form a circumferential bead in the cylinder liner, at which the piston stops in its maximum extended position comes. When assembling the syringe, the plunger pressed from the outside over the bead. With sufficient application of strength it is therefore also possible to remove the piston from the bulge pulling out of the cylinder, which is an unwanted splashing out of liquid can result.
- the object of the invention is to provide a syringe of the type mentioned Way to create, with the misuse avoided and operational safety is improved.
- the syringe In the syringe according to the invention there is a retaining ring intended for the piston.
- the retaining ring prevents the piston from being completely can be pulled out of the cylinder.
- the retaining ring can be activated and deactivated. In the ineffective state, it is intended to install the piston in the cylinder and allow removal of the piston from the cylinder.
- the syringe also has a piston head and a piston rod.
- the cylinder has a bottom with one Intake and exhaust opening and a cylinder liner into which the piston head fits under sealing.
- the cylinder liner is open at its end facing away from the cylinder bottom, so that the piston can be built into it.
- the retaining ring for the piston lies in front of the installation opening, and it is dimensioned so that not the piston head, but probably the piston rod through the retaining ring to pass therethrough.
- the piston rod preferably has guidance in the retaining ring.
- the guide acts to tilt the piston when filling and emptying towards the syringe.
- the syringe is preferably dimensioned such that the piston rod rather tears or tears off the piston head or a connection connector the syringe snaps out of its counterpart when that the piston head overcomes the retaining ring.
- the retaining ring is open clipped the cylinder liner .
- the retaining ring with the cylinder liner can also be used glued or welded or by subsequent deformation the cylinder liner be formed.
- the syringe according to the invention has a preferred use as Piston-cylinder dosing part for a bottle top dispenser.
- the syringe is an exchange part made of plastic with a piston-cylinder unit for a pipetting device, in particular a bottle top dispenser.
- the syringe has a cylinder base 20 with a central suction and discharge port 22 which is axially downward protruding cylindrical nozzle 24 is surrounded.
- the stub 24 is a sealing with the valve housing of a pipetting device Luer lock connection.
- the syringe has a circular cylindrical sleeve 28 for one Piston consisting of a piston head 30 and a piston rod 32 exists.
- the piston head 30 is axially sealed movable in the cylinder liner 28.
- the piston rod 32 attaches centrally and axially to the piston head 30 and stands at the top out of the cylinder liner 28.
- the cylinder base 20 can also be conical and the piston head 30 accordingly conical.
- the end of the cylinder liner facing away from the cylinder base 20 28 is open for the installation of the piston. After installation becomes a retaining ring 34 for the piston in the installation opening the cylinder liner 28 used and with the latter permanently connected.
- the retaining ring 34 is dimensioned so that the Piston rod 32 fits through.
- the retaining ring 34 is on the cylinder liner 28 of the piston-cylinder unit clipped on.
- a radial, axially and radially outward protruding hook 80 integrally formed on the outside of a ramp at its end 82 and has an undercut 84 behind it.
- the retaining ring 34 has barbs evenly distributed over the circumference at the edge 86, which spreads elastically over the ramp 82 allow the hook 80 to be pressed and 84 in its undercut come to mind.
- the piston has beyond its full Dosing strokes a misuse stroke reserve in the cylinder.
- the Piston head 30 takes one beyond the full metering stroke Secure stop position on the retaining ring 34.
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
- Fig. 1
- bis Fig. 3 Seitenansichten einer Spritze mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät, wobei
- Fig. 1
- den Kolben ganz eingefahren,
- Fig. 2
- den Kolben dem vollen Dosierhub entsprechend ausgefahren,
- Fig. 3
- den Kolben in Sicherungs-Anschlagstellung zeigt;
- Fig. 4
- ebenso einen auf den Zylinder aufgeklipsten Rückhaltering.
- 20
- Zylinderboden
- 22
- Ansaug- und Ausstoßöffnung
- 24
- Stutzen
- 28
- Zylinderlaufbuchse
- 30
- Kolbenkopf
- 32
- Kolbenstange
- 34
- Rückhaltering
- 76
- Ringnut
- 78
- Ringwulst
- 80
- Haken
- 82
- Rampe
- 84
- Hinterschneidung
- 86
- Widerhaken
Claims (5)
- Spritze aus Kunststoff, mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät mit einem aus dem Zylinder nicht herausziehbaren Kolben, der einen Kolbenkopf (30) aufweist, wobei der Zylinder einen Boden (20) mit einer Ansaug- und Ausstoßöffnung (22) und eine Zylinderlaufbuchse (28) hat, in die der Kolbenkopf (30) unter Abdichtung passt, und wobei die Zylinderlaufbuchse (28) an ihrem dem Zylinderboden (20) abgewandten Ende eine Einbauöffnung für den Kolben hat, die mit einem Rückhaltering (34) versehen ist, dadurch gekennzeichnet, dass der Rückhaltering (34) vor der Einbauöffnung und außerhalb der Zylinderlaufbuchse (28) liegt und dass der Kolben eine Kolbenstange (32) aufweist, die durch den Rückhaltering (34) hindurch passt und vorzugsweise darin Führung hat.
- Spritze nach Anspruch 1, dadurch gekennzeichnet, dass der Rückhaltering (34) mit der Zylinderlaufbuchse (28) verklebt oder verschweißt oder durch nachträgliche Verformung aus der Zylinderlaufbuchse (28) gebildet ist.
- Spritze nach Anspruch 1, dadurch gekennzeichnet, dass der Rückhaltering (34) wirksam und unwirksam schaltbar ist.
- Spritze nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass der Rückhaltering (34) auf die Zylinderlaufbuchse (28) aufgeclipst ist.
- Spritze nach einem der Ansprüche 1 bis 4 als Kolben-Zylinder-Dosierteil für einen Flaschenaufsatzdispenser.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702778A DE19702778A1 (de) | 1997-01-27 | 1997-01-27 | Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät |
| DE19702778 | 1997-01-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0855219A1 EP0855219A1 (de) | 1998-07-29 |
| EP0855219B1 true EP0855219B1 (de) | 2004-08-25 |
Family
ID=7818425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98100972A Expired - Lifetime EP0855219B1 (de) | 1997-01-27 | 1998-01-21 | Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6085944A (de) |
| EP (1) | EP0855219B1 (de) |
| DE (2) | DE19702778A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19702778A1 (de) * | 1997-01-27 | 1998-07-30 | Brand Gmbh & Co | Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät |
| FI108281B (fi) * | 1999-07-07 | 2001-12-31 | Biohit Oyj | Imulaite ja menetelmä käytettäväksi imulaitteessa |
| US6803022B2 (en) * | 1999-12-06 | 2004-10-12 | Becton, Dickinson And Company | Device and method for separating components of a fluid sample |
| DE20019821U1 (de) | 1999-12-09 | 2001-06-07 | BRAND GMBH + CO KG, 97877 Wertheim | Dosiereinrichtung für Flüssigkeiten |
| US7396512B2 (en) | 2003-11-04 | 2008-07-08 | Drummond Scientific Company | Automatic precision non-contact open-loop fluid dispensing |
| DE102012207898B4 (de) | 2011-05-11 | 2016-04-28 | Umwelt-Geräte-Technik GmbH | Kolbenhubpipette und Vorrichtung zur Bestimmung der Partikelgrößenverteilung in Bodenproben |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4117728A (en) * | 1977-12-22 | 1978-10-03 | Miles Laboratories, Inc. | Pipette |
| US4750373A (en) * | 1987-01-22 | 1988-06-14 | Shapiro Justin J | Adjustable volume, pressure-generating pipette sampler |
| GB9310084D0 (en) * | 1993-05-17 | 1993-06-30 | Reynolds David L | Improvements in pharmaceutical containers |
| FR2633520B1 (fr) * | 1988-06-30 | 1992-04-30 | Brunel Marc | Seringue du type comportant une aiguille d'injection a usage unique, notamment pour le domaine dentaire |
| CH682722A5 (fr) * | 1991-05-31 | 1993-11-15 | Andyval Inc | Compte-gouttes à réglage programmable. |
| DE19702778A1 (de) * | 1997-01-27 | 1998-07-30 | Brand Gmbh & Co | Spritze aus Kunststoff mit einer Kolben-Zylinder-Einheit für ein Pipettiergerät |
-
1997
- 1997-01-27 DE DE19702778A patent/DE19702778A1/de not_active Withdrawn
-
1998
- 1998-01-21 DE DE59811849T patent/DE59811849D1/de not_active Expired - Lifetime
- 1998-01-21 EP EP98100972A patent/EP0855219B1/de not_active Expired - Lifetime
- 1998-01-22 US US09/010,658 patent/US6085944A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19702778A1 (de) | 1998-07-30 |
| US6085944A (en) | 2000-07-11 |
| DE59811849D1 (de) | 2004-09-30 |
| EP0855219A1 (de) | 1998-07-29 |
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