Eppendorf Ag

Eppendorf Se

Peter Molitor

Burkhardt Reichmuth

Jens Wilmer

Holger Link

Peter Schmidt

Karl-Friedrich Andres

Herbert Belgardt

Boris Von Beichmann

Florian Tesch

Jan-Hendrik Hacker

Matthias Kunsch

Jörg Sattler

Heinz-Gerhard Köhn

Bernd Jagdhuber

Uwe Dunker

Steffen Hofmann

Hinnerk Ossmer

Marcel Gültig

Janine Jacobi

Helen Hahn

Anne Herklotz

Sönke Becker

A pipette with an adjustable volume comprises a housing comprising an outside surface, at least one seat defining an opening, and a displacement apparatus defining a displacement chamber comprising a displacement element configured to be displaced therein. A stroke rod is coupled to the displacement element and configured to be displaced relative to the housing order to displace the displacement element. An adjusting apparatus is configured to adjust a position of an upper stop in the housing, a display apparatus is configured to display a set dosing volume, and a coupling apparatus is positioned between the adjusting apparatus and the display apparatus. The coupling apparatus is configured to couple the adjusting apparatus to the display apparatus in an engaged state and configured to uncouple the adjusting apparatus from the display apparatus in a disengaged state.

Pipette with adjustable dosing volume

An electronic laboratory metering system for liquids includes an electrical hand-held metering device () having at least one operation sensor unit () that detects operation of the hand-held metering device () and generates operating data and stores same in a storage apparatus (), wherein the hand-held metering device () has an interface module () for connecting the hand-held metering device () to an external network access apparatus () for transferring the operating data; the metering system (), specifically a data processing system (), has a comparison unit () to compare operating data with target operating data and/or to compare context parameter data from the context parameter sensor unit () with target context parameter data and to generate a comparison result. The metering system () includes a documentation unit () designed to generate and store log data records including at least the operating data and/or the context parameter data. The documentation unit () is connected to the comparison unit () to transmit the comparison results from the comparison unit () to the documentation unit () and the documentation unit () stores the comparison results as part of the log data records to be assigned to the relevant operating data and/or context parameter data, to add to same after operation of the hand-held metering device () has ended.

Electronic laboratory metering system for liquids and method for operating an electronic laboratory metering system for liquids

A pipette with an adjustable dosing volume comprises a housing connected to at least one seat configured to releasably hold a pipette tip. A displacement device is positioned within the housing and configured to aspirate and discharge liquid from the pipette tip. A stroke rod is coupled to the displacement element and configured to be longitudinally displaced relative to the housing to displace the displacement device. A catch sleeve is rotatably mounted within the housing and is connected to the stroke rod. An adjusting sleeve configured to engage a transducer shaft that is rotatably mounted within the housing and comprises a countershaft of a gearbox that is configured to be shifted between different shift stages. Each shift stage comprises different gear ratios between a rotational speed of the adjusting sleeve and a rotational speed of the catch sleeve. The different gear ratios enable coarse volume adjustment and fine volume adjustment.

Pipette

A method for dosing a liquid using a pipette with adjustable dosing step size and an indicating equipment and a syringe that can be operated using the pipette, wherein the syringe is detachably connected to the pipette, at option, the dosing step size is set, or the dosing step size set before is maintained, the dosing volume adjusted via the dosing step size is indicated by means of the indicating equipment, the maximum number of dosing steps possible without refilling the syringe, with the set dosing step size and completely filled syringe is indicated by means of the indicating equipment, liquid is aspirated into the syringe, a reverse stroke is performed after the syringe is filled with liquid, dosing steps are performed, the performed dosing steps are counted and the number of performed dosing steps and/or the number of dosing steps still possible without refilling the syringe is determined and indicated by means of the indicating equipment, after performing the maximum number of dosing steps possible without refilling the syringe, either the syringe is detached from the pipette, or the previous steps are performed anew by means of the same syringe, wherein in the dosing step, the overall performed number of dosing steps with the syringe with the set dosing step size is counted, and/or the number of dosing steps still possible without refilling the syringe is determined and indicated by means of the indicating equipment.

Method for dosing a liquid using a pipette and a syringe, and pipette for operating a syringe for dosing a liquid

The invention relates to a pipetting apparatus, for pipetting a fluid sample in accordance with at least one mode of operation of the pipetting apparatus, which is controlled by an operating parameter set, which is associated with a corresponding mode of operation, wherein the electric control device of the pipetting apparatus is designed to automatically store the at least one parameter value set determined by the user to be the at least one historic parameter value set for this mode of operation in the memory device, and is designed to provide, after the operating parameter set for this mode of operation has changed, the at least one automatically stored historic parameter value set for this mode of operation again for the subsequent control of the at least one, same, pipetting process. The invention also relates to a method for operating the pipetting apparatus.

Electric pipetting apparatus, and method for operating an electric pipetting apparatus

A method for dosing a liquid using a pipette with adjustable dosing step size and an indicating equipment and a syringe that can be operated using the pipette. The syringe is detachably connected to the pipette. The dosing step size is set, or the dosing step size set before is maintained. The dosing volume adjusted via the dosing step size is indicated. Liquid is aspirated into the syringe. Dosing steps are performed, counted and the number of performed dosing steps and/or the number of dosing steps still possible without refilling the syringe is determined and indicated. After performing the maximum number of dosing steps possible without refilling the syringe, either the syringe is detached, or the steps are performed again. The overall performed number of dosing steps with the set dosing step size is counted, and/or the number of dosing steps still possible without refilling is determined and indicated.

A handheld pipetting apparatus for metering liquids, with a handleable pipette housing, at least one accommodation for a fastening portion of a syringe cylinder of a syringe, at least one plunger accommodation in an accommodation body for a plunger fastening portion of a syringe plunger of the syringe, syringe and plunger gripping levers for detachably holding the fastening portion in the accommodation and the plunger fastening portion in the plunger accommodation, at least one displacement device with a displacement chamber and a shiftable chamber wall limiting the same, for displacing a fluid; at least one seat for detachably holding a pipette point, a channel, connecting a hole in the seat with a displacement chamber, and at least one drive device, which is connected to couplable with the accommodation body the and/or the chamber wall, for shifting the accommodation body with respect to the accommodation, the and/or the chamber wall with respect to the displacement chamber.

Handheld pipetting apparatus

A metering apparatus for liquids and a method for metering liquids which facilitate the operation of a further metering after detaching the pipette point or syringe.

Metering apparatus for liquids and method for metering liquids

A plunger stroke pipette for replaceable pipette points with a seat for the detachable mounting of a pipette point, a plunger, a cylinder in which the plunger is movably arranged, a connection channel connecting the cylinder with an opening in the seat, a driving equipment, coupled to the plunger for displacing the plunger in the cylinder, an upper stopper and a lower stopper and at least one counter-stopper of the driving equipment and/or the plunger for limiting the stroke of the plunger, a holder, holding the lower stopper, an overstroke spring between the upper stopper and the holder, an adjustment equipment for adjusting the position of the holder with respect to the cylinder, and an indicating equipment for indicating the position of the holder.

Plunger stroke pipette

An electronic metering apparatus for metering liquids with a drive with an electric motor, at least one displacer device with a displacer element, which is connected and/or connectable to the drive, an electric mode key and an electric parameter key for changeover between different menus, a pair of electric control keys, arranged next to each other, for navigation in the menus, setting of parameters and controlling the dislocation of the displacer element, wherein the two control keys control the navigation in the menus, the setting of parameters and the dislocation of the displacer element in different directions, an electronic display device for displaying menus and parameters, an electric control unit, which is connected to the electric motor, the electric mode key, the electric parameter key, the electric control keys and the electric display device, and which controls the display of menus and parameters by the display device as well as the dislocation of the displacer element corresponding to the actuation of the mode key, the parameter key and the control keys, and an electric power supply.

Electronic metering apparatus for metering liquids

An electronic metering apparatus for metering liquids, with a longitudinal, handleable housing, a drive, arranged in the housing, with an electric motor, at least one displacer device, arranged in the housing or being capable to be arranged on the same, with a displacer element, which is connected to the drive and/or connectable to the same, at least one holding device on the bottom end of the housing for holding a pipette point or a syringe, at least one electric operational control in or on the housing, at least one electric information device in or on the housing, an electric control unit arranged in the housing, which is connected to the electric motor, the electric operational control and the electric information device, and which controls the information device depending on the position and/or previous changes of the position of the displacer element, in order to put out an information concerning the next reasonable dislocation of the displacer element, and an electric power supply.

A pipetting device with a displacement chamber, a flexible membrane delimiting the displacement chamber, a driving equipment for deforming the membrane, a coupling equipment between the driving equipment and the membrane for coupling the driving equipment with the membrane, an equipment for detachably holding a pipette tip, a connection channel between the displacement chamber and the equipment for detachably holding the pipette tip, and an aperture equipment, covering the edge region of the membrane with at least one adjustable aperture opening straight through which the central region of the membrane is deformable.

Pipetting device

An electronic metering apparatus for metering liquids with a drive, at least one displacer device with a displacer chamber and a displacer element arranged therein, which is connected to the drive, at least one holding device for a pipette point, which has a passage channel which is connected with the displacer chamber, a data memory with memory locations for different calibration data concerning different pipette points and/or different liquids and/or different usage conditions, an electric selection device for selecting calibration data, an electric control unit, which is connected to the electric selection device, the data memory, and to the electric drive motor of the drive and/or an electric display device, and which controls the movement of the displacer element by means of the electric motor and/or the display of the metering volume through the display device with recourse to the calibration data from the data memory, selected with the aid of the selection device, and an electric power supply.

Pipette having an axially relocatable control button, a pressure sensor, which is integrated into the control button, a lifting rod, coupled with the control button and having a stopping bead, a hollow driving spindle, accommodating the lifting rod and being axially relocatable, a twisting lock, preventing the driving spindle from being twisted, a turnable driving nut having screw thread engagement with the driving spindle, an axial support of the driving nut, an electric driving motor with a motor shaft, a gear between the motor shaft and the driving nut, an electric power supply, an electric control system, connected to the pressure sensor, the electric driving motor and the electric power supply, which provides an electric voltage to the electric driving motor upon a push on the control button which is indicated by the pressure sensor, so that the motor relocates the driving spindle via the gear in the direction of a relocation of the control button by the push, the driving spindle taking the lifting rod along with it on its stopping bead, a plunger, coaxially displaceable with respect to the lifting rod, a cylinder, connected to an opening which leads outward and in which the plunger is sealingly guided, and a plunger spring loading the plunger in the direction of an end of the lifting rod.

Growing community of inventors

Henstedt-Ulzburg, Germany

Peter Molitor