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.

In an embodiment, an immunochemistry analysing system includes a source of paramagnetic particles, a source of fluid, a cuvette configured to receive the paramagnetic particles and the fluid, a pipette configured to (i) translate so that at least a portion of the pipette is located within the cuvette and (ii) dispense at least one of the paramagnetic particles and the fluid into the cuvette so that the paramagnetic particles and the fluid can be mixed within the cuvette, a motor configured to move the pipette while located in the cuvette, and a control unit configured to vary a motor drive of the motor to cause the pipette to mix the fluid with the paramagnetic particles within the cuvette.

A pipette (1) having a cylinder (10), a piston (8), a volume display (25) for displaying a pipetting volume (14) associated with the piston stroke, a display adjustment mechanism (22) for changing the volume display (25), an adjustment display for indicating an adjustment of the pipette (1) via the volume display (25), and a volume adjustment mechanism (19) for changing the piston stroke, the volume adjustment mechanism (19) being coupled to the display adjustment mechanism (22) in a first mode of operation of the pipette (1), and the volume adjustment mechanism (19) being decoupled from the display adjustment mechanism (22), and the display adjustment mechanism (22) being coupled to the adjustment display in a second mode of operation of the pipette (1), a method of operating such a pipette.

A multichannel pipetting head comprises a plunger actuator comprising at least one groove with an upper border, and a lower border. A plurality of plunger-cylinder units, wherein each plunger-cylinder unit comprises a cylinder and a plunger comprising a plunger head. The plunger head comprises a projecting upper abutment region adjoining the upper border, a projecting lower abutment region adjoining the lower border and laterally offset relative to the projecting upper abutment region, a plurality of guides. Each of the cylinders is coupled to a neck and held on each of the plurality of guides. During lateral movement of the plurality of guides, the plunger head is configured to tilt in the groove and to be held with the upper abutment region abutting the upper border and with the lower abutment region abutting the lower border of the groove due to restoring forces that occur during tilting in the plunger-cylinder units.

An auto-pipetting apparatus includes a dispensing head with at least one pipetting tip mandrel having an elongated stud body with an insertion end. The at least one pipetting tip mandrel mates with a pipetting tip. A first adjustable seal, disposed on the elongated stud body, and a second adjustable seal, disposed on the elongated stud body, seal the pipetting tip mated to the at least one pipetting tip mandrel. The first adjustable seal defines a snub surface. The snub surface effects a substantially continuous circumferential contact seal with radially impinging contact between the pipetting tip and the at least one pipetting tip mandrel. The second adjustable seal is adjustable between a disengaged position and an engaged position and effects a releasable grip and another substantially continuous circumferential contact seal between the pipetting tip and the at least one pipetting tip mandrel around the pipetting tip.

An add-on device for attachment to a micropipette for determining the rotational movement and longitudinal displacement of a micropipette plunger for digitization, communication and quantification of pipetting actions.

The invention relates to a pipetting device for receiving and dispensing fluid volumes. The pipetting device has a drive device with an electric motor and a gear device with a first output device. The gear device is driven by the electric motor by means of a rotary motion and is designed to transmit a rotary motion of the electric motor to the first output device. According to the invention, the gear device has a second output device and is designed to transmit a rotary motion of the electric motor to the second output device.

Techniques for antenna positioning system having a drive element shared by multiple antennas for positioning about a positioning degree of freedom are described. In some examples, each antenna can be coupled with a rotating spindle, with each antenna spindle being coupled with the shared drive element. By driving a shared drive element, each of the antenna spindles in the system can be rotated via the associated coupling. In some examples, such a coupling may include link arms with an adjustable length to reduce backlash or to apply a preload to the system. In some examples, such a coupling may be configured to position multiple antennas over different orientation ranges in response to the drive element driving over an actuation range, which may include one antenna being idled or otherwise maintained at an orientation while another antenna is driven, or may include different antennas being driven according to different actuation ratios.

An air cushion pipette comprises at least one seat configured to releasably hold a pipette tip and a displacement apparatus comprising a displacement chamber including a displacement element configured to be displaced therein. A drive apparatus is coupled to the displacement element and configured to displace the displacement element in the displacement chamber. An overstroke apparatus comprises a lower stop and is configured such that a stop element displaces the lower stop downwards when the stop element presses against the lower stop, wherein the downward displacement of the lower stop is limited to a first overstroke. A displaceable overstroke limiting element is configured to enable the displacement of the lower stop downwards by the first overstroke in a release position and limit said displacement to a second overstroke that is shorter than the first overstroke in a blocking position.

A positioning system (1) that has a system main part (4), on which multiple working units (6) are arranged next to one another in the axial direction of a y-axis, said working units being linearly movable, thereby carrying out a working movement (8) in the axial direction of a z-axis. Each working unit (6) is paired with a dedicated drive unit (7) in order to be actuated, said drive unit having a stator (23) attached to the system main part (4) and an output element (24) drivingly connected to the working unit (6) via a coupling section (26). The stators (23) are distributed into multiple stator rows (58) which are aligned in the axial direction of the y-axis and are arranged one behind the other in the axial direction of the x-axis, wherein the stators (23) of each pair of adjacent stator rows (58) are offset to one another with a mutual overlap in the axial direction of the y-axis.