The present technology is directed to extraction devices, systems, and methods for controllably withdrawing and transferring fluid samples, such as blood, from a sample collection container to a testing device. For example, some embodiments of the present technology provide fluid extraction devices that include a fluid control module, a housing containing a receiving element and a suction element, and an actuator. To transfer blood from a sample collection container to a testing device, a user places the sample collection container over the receiving element and inserts the testing device into an outlet of the fluid control module. The user then pushes a lever or otherwise actuates the actuator, which automatically withdraws a predetermined volume of blood from the sample collection container and transfers it to the testing device positioned at the outlet of the fluid control module.

Multivolume liquid pipettes with nested plunger and vacuum chamber configurations and methods of using such pipettes are disclosed herein. These pipettes typically include a body and a fluid displacement assembly with a small plunger element slideably received within a larger plunger element, each movable within a vacuum chamber for the precise and accurate control of the displacement of fluid, such as air. In turn, this allows for a single device to aspirate and dispense a broad range of liquids in a dynamic, accurate, and precise manner. In addition, the devices disclosed herein may also include a multi-tiered spring-loaded ejection mechanism to allow the user to use and eject pipette tips of different sizes.

The present invention relates to a mini-pipette, and more particularly, to a mini-pipette which has capacity varying means that can vary the movement distance of a push button reciprocating in the outer body to generate suction force so that a variety of samples can be easily collected. The present invention provides a mini-pipette comprising: an outer body having a hollow movement space and a suction passage formed at a lower part of the outer body; a push button for generating negative or positive pressure in the suction passage while reciprocating in the movement space of the outer body; elastic means for elastically supporting the push button in the movement space; and a capacity varying means formed inside the outer body, for varying a movement distance of the push button in the movement space.

The present invention relates to a coupling formation of a pipetting channel of a pipetting device for coupling of an implement, for instance a pipette tip, or a laboratory instrument, laboratory tool or the like, thereto, wherein the coupling formation surrounds a pipetting channel section which extends along a pipetting channel axis which defines an axial direction, wherein the coupling formation additionally has, at its free longitudinal end, a pressure-imparting orifice into which the pipetting channel section opens and has, at its radially outer surface which surrounds the pipetting channel axis and extends principally in axial direction and in peripheral direction about the pipetting channel axis relative to the pipetting channel axis, a coupling projection which yields in the radial direction, which is characterized in that the coupling projection is provided so as to be essentially undeformable but radially movable on a spring arrangement which is elastic in radial direction.

A dispensing device for dispensing a defined volume of a liquid from a closed container includes a housing and a spring loaded piston disposed therein. The housing has a holding chamber that includes chamber snap fit elements on the chamber wall, piston stop(s), and a bottom having a central opening with a tubular member extending therefrom. The spring loaded piston includes a push cap including snap fit arms extending from underside of a top pusher and a spring around a piston rod under the top pusher. The device is so configured that engagement modes between arm snap fit elements of the push cap and chamber snap fit elements of the holding chamber control a venting position and an injection starting position of the spring loaded piston, and abutment of the push cap with the piston stop(s) in the holding chamber controls an injection ending position of the spring loaded piston.

A telescoping electric pipette controller has a handle, a head end portion, an outer shell and a manual retainer. One end of the head end portion is arranged in an end portion of the handle in a penetrating manner, the outer shell is sheathed over an outer surface of the end portion of the handle, and one end portion of the manual retainer is rotatably connected to the outer shell. By means of opening or fastening the manual retainer, one end portion of the manual retainer is released outwards or pressed inwards against the head end portion, allowing extension and retraction of the head end portion relative to the handle. The extension and retraction, as well as the locking of part of a grip structure, are controlled by means of a switch, allowing the grip to change the length within a specific range.

A dog clutch system for holding the position of a volume adjustment screw for a pipetting system, the system comprising: —a first toothed wheel comprising first teeth; —a second toothed wheel comprising second teeth; —a return spring capable of urging the first and second wheels against each other, the second teeth of the second wheel forming a number N of concentric annular rows, and the second wheel having at least one tooth overlap area in which the N annular rows of second teeth have, respectively, N overlap sectors that overlap each other in a radial direction, and within which the teeth are angularly offset.

A system includes a pipetting system including a 3-axis gantry; a sled mechanism to select a magnetic comb from a set of magnetic combs; a fluorometer; and a set of receptacles to receive welled plates. A method for purifying nucleic acids includes applying a sample to a well of a multi-well plate, selecting a magnetic comb from a set of magnetic combs disposed on a gantry system, collecting magnetic beads using the magnetic comb, collecting nucleic acid using the magnetic beads, and eluting the nucleic acid from the beads.

The invention relates to a pipette with a body for receiving a displacement device, the displacement device comprising a displacement chamber and a movable boundary element for bounding a pipetting stroke of the pipette. The pipette furthermore has an operating element for setting the pipetting volume of the pipette by movement of the boundary element in the body and for performing a pipetting operation, the operating element being in operative connection with a piston movable in the displacement chamber of the displacement device. The pipette furthermore comprises a counter for displaying the set pipetting volume and a locking mechanism for locking and/or unlocking volume setting by the operating element.

It is provided that, on actuation of the operating element, the operating element is configured to perform a pipetting operation, to transfer the locking mechanism into a locked position and to lock adjustment of the pipetting volume.

The present invention defines a positioning assembly including a base part (110) and a holder part (120) for holding a device, whereby the assembly further includes a motor (160) for driving a displacement mechanism (150) mounted to the base part. The base part and the holder part are arranged parallel to each other and are connected via a displaceable slide link (140), which is configured to slide on a first guide rail (111) provided on the base part and on a second guide rail (122) provided on the holder part, whereby each guide rail extends in longitudinal direction (z). The slide link (140) is coupled to the displacement mechanism (150), which causes displacement of the slide link relative to the base part in longitudinal direction. Furthermore, the holder part (120) is moveably coupled to the base part (110) via a coupling arrangement which has a first element (115) provided on the base part, a second element (125) provided on the holder part and a third element provided on the slide link (140). The first, second and third elements of the coupling arrangement are configured to engage with each other such that linear displacement of the slide link (140) relative to the base part (110) in one direction causes linear displacement of the holder part (120) relative to the slide link in the same linear direction.