Eppendorf Ag

Eppendorf-netheler-hinz Gmbh

Eppendael Ag

Eppendorf Group Se & Co. Kg

Eppendorf Se

Jens Wilmer

Burkhardt Reichmuth

Peter Molitor

Holger Link

Herbert Belgardt

Martin Seippel

Tobias David

Marc Wilth

Frank Horstmann

Jörg Sattler

Matthias Kunsch

Ernst Tennstedt

Uwe Dunker

Matthias Meinicke

Ingo Winter

Ranier Rothhoff

Sönke Becker

A metering head for a metering machine having a carrier having parallel attachments for picking up pipette tips wherein each attachment has a tube having a supporting protrusion at the bottom end at least one sleeve which surrounds the tube and can be axially shifted on the tube, and at least one elastomer O-ring which surrounds the tube a pressure plate above the sleeves having a plurality of first holes through which the tubes extend, wherein the pressure plate can be shifted along the tubes from a release position into a clamping position where the sleeves are pressed, at the bottom ends, against the adjacent O-rings, and the O-rings are expanded to clamp pipette tips; and a first shifting apparatus connected to the pressure plate moving the pressure plate between the release position and clamping position.

Metering head, metering device comprising a metering head, and method for metering by means of a metering head

A pipette for use with a pipette tip includes a housing, a pin on the bottom end of the housing holding a pipette tip having first means for form-fit connection and a second means for form-fit connection which can be shoved onto the pin, constricting the pin, and/or expanding the tip before form-fit connection with the pin, a drive apparatus, at least one locking sleeve arranged concentric to the pin which is guided toward the pin in the housing, wherein the locking sleeve has a locked position having a pin in the inside constricted by shoving on a pipette tip, and/or is bordered on the outside by a tip shoved onto the pin, preventing a release from the pin, and the locking sleeve is upwardly displaceable out of the locked position so that the pin, and/or the tip is released, and the tip is removable from the pin.

Pipette for use with a pipette tip

A metering head for a metering machine having

A pipette for use with pipette tips in which a set metering volume is secured in that the locking body is arranged on the circumference of the annular cylindrical locking element when it is in the locking position. Through this, the transmission part which the locking element comprises on the outer circumference is held fast. The annular cylindrical locking element can be formed separately from a toothed ring for driving a counter mechanism. Thus, it is possible to perform the locking in arbitrary positions or in more selectable rotational positions than in the conventional locking equipment, where a locking element engages into the toothed ring for driving the counter mechanism.

Pipette with releasable locking of rotational position of actuating element

A pipette with a rod-shaped casing, a seat, a displacement equipment, comprising a displacement chamber with a relocatable limit, a connection channel, a drive equipment for relocating the relocatable limit of the displacement chamber, coupled to the relocatable limit and having an axially relocatable lifting rod, an upper stop body, a lower stop body and a stop element on the circumference of the lifting rod for limiting the stroke of the lifting rod, an overstroke spring, a stationary screw element, and with a screw element that is relocatable in the casing, a toothing, running along a helical line with the same pitch as that of the thread of the relocatable screw element and having teeth on the upper edge of the relocatable screw element that are directed in the direction of the instantaneous axis of the relocatable screw element, a toothed driving wheel, and means for rotating the toothed driving wheel.

Pipette

A pipette with a displacement unit, a drive unit, means for the detachable connection that detachably connects together the upper housing part and the lower housing part, an ejection device, an end stop, a decoupling device and coupled to the drive device, a lower stop body that upon decoupling of the drive element from the drive device by the decoupling device strikes the actuating end of the ejection extension in order, with further shifting of the actuating element in the actuating direction, to shift downward the ejection extension and the ejection slide.

Gripping tool for automatic laboratory machines, with gripping appliances for gripping vessels, an appliance for converting and/or transferring of movements, the power take-off of which is coupled with the gripping appliances in order to drive them, a coupling appliance for detachable connection with a drive appliance of a tool support of an automatic laboratory machine, which is coupled with the drive of the appliance for converting and/or transferring in order to drive it, and a mounting appliance for detachable mounting of the gripping tool on the tool support of the automatic laboratory machine, while the coupling appliance is connected with the drive appliance of the tool support.

Gripping tool, dosage tool and tool support for an automatic laboratory machine

The present invention is related to a pipetting device with a throw-off system for detachably connecting with at least one pipette tip, at least one displacement device, a driving device for driving a displacement member of the displacement device and an adjustment device with a lead screw nut and a lead screw for adjusting the metering volume.

Pipetting device

Pipetting device for metering liquids comprising a piston actuating rod, at least one receiver for a piston head arranged on one end of the piston actuating rod and which is defined by an abutment surface for the piston head in the axial direction of the piston actuating rod, and comprises a through-opening for a piston rod opposing said piston head and a base for supporting the piston head surrounding the through-opening, at least one cylinder with a hollow space, at least one seat for holding a pipette tip, at least one through-channel connecting the hollow space of a cylinder to a through-hole in a seat and at least one piston arranged longitudinally displaceably in a cylinder with a piston rod extending through the through-opening of a receiver and a piston head at the end of the piston rod arranged in the receiver, which is positioned on the base with a lower face facing the piston rod and comprises a resilient body projecting beyond the upper face facing away from the piston rod, which does not bear against the abutment surface in an elastically compressed manner or bears against the abutment surface in a partially elastically compressed manner.

Pipetting device with an upper part of the casing, a driving element, arranged in the upper part of the casing, with a movable drive element, a spigot receiver, arranged in the upper part of the casing, at least one claw receiver inside the spigot receiver, a lower part of the casing, at least one displacement equipment, arranged in the lower part of the casing, with a displacement chamber, at least one seat for detachably holding a pipette point, arranged on the lower part of the casing and being connected with the displacement chamber via a channel, a spigot, arranged on the lower part of the casing, to be inserted into the spigot receiver, at least one snap hook, arranged on the spigot, with a claw for engaging into the claw receiver when the spigot is inserted into the spigot receiver, and a springy shaft, which is deflectable transversely to the axis of the spigot in order to lift off the claw out of the claw receiver, a lock release ring, movable on the spigot, a wedge gear on the shaft and the lock release ring, effecting deflection of the snap hook towards the axis upon displacement of the lock release ring in a certain direction, and away from the axis upon displacement of the lock release ring in the direction opposite thereto, and a coupling equipment for coupling the drive element and the displacement equipment when the spigot is inserted into the spigot receiver.

Multi-channel metering device with displacement devices for displacing a plurality of air columns, a plurality of holders which comprise a shank for releasable connection to a pipette tip, a connector and a connecting channel extending from the free end of the shank to the connector, flexible pipes which connect the displacement devices to the connectors, a guide on which the holders may be displaced with shanks aligned parallel to one another and perpendicular to the guide, abutment surfaces on the faces of the holders facing one another, pins projecting from the holders, oriented perpendicular to the guide and the shanks, round chain links arranged on the pins of adjacent holders, a free space existing between the pins and the rounded portions of the round chain links when the abutment surfaces of the adjacent holders bear against one another, and a drive device which engages at least one of the two outer holders and by means of which the holders may be pushed apart and pushed together along the guide.

Multi channel metering device

A proportioning system, comprising at least one tool, a programmable electronic storage device disposed on the tool, a proportioning device including a device for releasably mounting the tool, a device for actuating the tool, and a device for controlling of the device for actuating the tool and/or device for releasably mounting it, and a device for contacting connected to the device for controlling and disposed on the proportioning device and another device for contacting disposed on the tool that is connected to the programmable electronic storage device wherein the device for contacting and the other device for contacting contact each other when the tool is releasably mounted on the proportioning device.

Proportioning system and process for operating a proportioning system

A pipetting system with a pipetting device and at least one pipette tip releasably fastenable thereon, at least one fastening element on the pipetting device, on which the pipette tip is fastened, an ejection means on the pipetting device, which has an axially movable ejection element for releasing the pipette tip from the fastening element with an axial movement of the ejection element and a drive means for driving the axial movement of the ejection element, and a pull-means gear, push-means gear or linkage gear which transmits an essentially axial drive movement of the drive means into an axial movement of the ejection element and with which the ejection element at least on releasing the pipette tip from the fastening element is axially movable over a smaller distance than the essentially axial drive movement covers and an ejection force exceeding the force for the essentially axial drive movement can be exerted onto the pipette tip.

Growing community of inventors

Ahrensburg, Germany

Jens Wilmer