Brand Gmbh + Co. Kg

Jürgen Schraut

Daniel Setzer

Peter H Mahler

Dieter Böhm

Steffen Gehrig

Renate Rempt

Wolfgang Ettig

Christian Berberich

Rainer Feldmann

Burkard Schaub

Roland Wohner

Ralf Braun

Thomas Howe

Michael Zugelder

Dieter BÖHM

A dispenser for taking up and discharging fluid volumes which has an exchangeable piston-cylinder unit. The dispenser has a housing and a device for incremental distance measurement that, when there is relative movement between the piston and the cylinder, the distance traveled by the piston relative to the housing can be determined incrementally. The dispenser has a piston actuation member which can be releasably connected to the piston moving the piston in order to take up and/or discharge fluid volumes. The dispenser has a position determining device which has a first position element and a second position element. The first position element is fixed in or on the housing of the dispenser. The second position element is coupled so as to be able to move with the piston actuation member. The position determining device is for continuously sensing the position of the second position element.

Dispenser, system and method for taking up and dispensing fluid volumes

A dispenser for receiving and dispensing volumes of fluid, on which a piston/cylinder unit having a piston and a cylinder, can be fitted in a releasable manner by means of a movement running at least substantially in an axial direction of the dispenser. The dispenser has a piston actuator for moving the piston relative to the cylinder. The piston actuator is arranged in a movable manner in the dispenser and is driven by means of a drive. The dispenser has a locking element which is arranged in a movable manner in the dispenser and is driven by a further drive. Also disclosed is a system for receiving and dispensing volumes of fluid, to a method for fitting a piston/cylinder unit in a releasable manner on a dispenser, and to a method for releasing a piston/cylinder unit which has been fitted on a dispenser.

Dispenser for taking up and dispensing volumes of fluid and a method for mounting and releasing a piston-cylinder unit from the dispenser

A method for detecting the type of an exchangeable piston-cylinder unit for a dispenser, to a piston-cylinder unit having at least one radially oriented information carrier section, and at least one axially oriented information carrier section, both of which at least partially specifies the type of piston-cylinder unit, and to a dispenser having an acquisition device for automatically identifying the type of piston-cylinder unit arranged on the dispenser. The method has at least the following steps: a) detachably mounting the piston-cylinder unit on the dispenser by at least an axial movement; b) detecting completion of a successful mounting of the piston-cylinder unit on the dispenser with a sensor device; c) detecting an information of the axially oriented information carrier section; d) detecting an information of the radially oriented information carrier section; and e) determining the type of the piston-cylinder unit mounted on the dispenser from the detected information.

Method for detecting the type of an exchangeable piston-cylinder unit for a dispenser

A control unit for controlling a pipetting machine a pipetting machine, and a method for controlling a pipetting machine, wherein the control unit controls at least one actuator for moving a pipetting device between receptacle units for liquids to be pipetted and for receiving or dispensing liquids to be pipetted. The control unit, by selecting one or more graphic receptacle unit equivalents which correspond to receptacle units, assigns at least one transfer parameter to the receptacle unit equivalents. The transfer parameter corresponds to a transfer volume, which is to be received from the receptacle unit corresponding to the respective receptacle unit equivalent or is to be dispensed into the receptacle unit corresponding to the respective receptacle unit equivalent. The control unit is additionally designed so that selected source receptacle unit equivalents are simultaneously assignable to multiple target receptacle unit equivalents.

Control unit for pipetting machines

A pipetting apparatus for aspirating and dispensing liquids having a pipetting unit with an interchangeable vessel that receives a liquid to be transferred, a holder for the pipetting unit, a positioning device for the pipetting unit, a micrometering unit, and an electronic control device. The micrometering unit is embodied separately from the pipetting unit and has a separate electronic control unit. The pipetting unit has a coupling device and the micrometering unit has a counterpart coupling device that matches the coupling device for the purpose of coupling. Coupling device and/or counterpart coupling device is/are switchable. The holder or the micrometering unit has a contact device with at least one electrical contact element and the micrometering unit or the holder has a counterpart contact device, matching the contact device, with at least one counterpart electrical contact element for making electrical contact with the contact element.

Pipetting apparatus for aspirating and dispensing liquids

A pipette device having a pipette unit (), a positioning unit (), a micro-dosing unit () and a control device (). The micro-dosing unit () is implemented separately from the pipette unit (). However, it can be coupled to the pipette unit () in a precisely defined relative position. The pipette unit () thus has a coupling device () and the micro-dosing unit () has a corresponding counter-coupling device (). One of the two devices can be switched. By switching the coupling device () and/or the counter-coupling device (), the micro-dosing unit () can be coupled to the pipette unit () or decoupled from the pipette unit () as desired. If the micro-dosing unit () is coupled to the pipette unit (), it can be moved to different operating positions together with the pipette unit ().

Pipette device having a micro-dosing unit

A liquid dispensing and/or aspirating device to be operated manually repeatedly, having a controlling device, a motor drive, control electronics, a manually actuatable actuating element, and a programming element, where the quantity of liquid which is conveyed by motor on actuation of the actuating element is adjusted in the control electronics by the programming element. A process interval (t) for a plurality of process steps to be carried out in succession is stored in the control electronics. A first type of actuation of the actuating element triggers an individual process step, while a second type of actuation automatically results in repeated successive triggering of process steps, each in the process interval (t). Handling of the device in practice is greatly improved by the fact that the process interval (t) is automatically determined by the control electronics by analyzing the interval(s) occurring between the individual actuations of the actuating element.

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Rettersheim, Germany

Jürgen Schraut