Abstract: A dosing device for liquids, with a distributor rail and a plurality of dosing units for the liquid that are hydraulically connected to the distributor rail. Each dosing unit has a valve unit, preferably a suction valve, a discharge valve and a discharge cannula. A piston-cylinder unit is detachably arranged on each valve unit for drawing in and measured discharging of the liquid. Each valve unit has a hydraulic connection element for detachable hydraulic connection to the distributor rail. The distributor rail has an elongate fluid supply line, a supply connection for the liquid being provided on an end of the distributor rail and dosing unit connections being distributed laterally along the length of the rail. Each of the dosing unit connections are detachably coupled to the hydraulic connection elements of the dosing units. The distributor rail is a replaceable part made of a preferably recyclable, injection-moldable plastic.

Abstract: A bottle top dispenser for handling liquids having a piston-cylinder arrangement in an outside housing. At least one actuating button (49) that can be pressed downwards is arranged on the upper side of the outside housing. The outside housing (2) can be provided with ventilation openings (48) that can be hidden beneath the actuating button (49). The bottle arrangement is also characterized by a specific arrangement of a sensor system (65) in relation to a measuring strip (64) on a piston rod (28). The path measuring signal can be evaluated by means of a magnetoresistive sensor system, especially such a system based on the AMR effect. The arrangement of the measuring strip (64) in relation to the longitudinal central axis of the piston rod (28) is of considerable importance.

Abstract: A motorized pipette is described for pipetting and titration of especially small amounts with an especially slow rate. An interruptable dispensing cycle allows extremely accurate titration and pipetting in which a take-up cycle is continued with an additional volume of a limited amount. Additionally, a certain minimum dispensing rate, which is preferably preset at the factory, for certain operating modes can be provided.

Abstract: A multichannel pipette, including a grip part defining a longitudinal axis and including a piston-driving device movable axially thereon, a displacement part rotating about the axis and having cylinder and piston arrangements, and a connection device for detachably connecting the grip part to the displacement part and permitting a rotation of the displacement about the longitudinal axis. The connection device includes threaded connection elements engaged with one another. The pistons move axially to the cylinders via a piston-driving device. A connection part of the threaded elements is axially connected with the cylinders and includes a clearance for a rotary bearing provided therein. Form-fit configurations on the support and connection parts are engaged to prevent a reverse rotation of the connection part relative to the support part. By a manual release action, the form-fit configurations disengage, such that the connection part rotates in a reverse rotation relative to the support part.

Abstract: A pipette has a preferably thermoplastic pipette shaft, for slipping on a likewise preferably thermoplastic pipette tip, has a slip-on section which opens at least slightly conically, and an attachment section which is formed on the lower end of the pipette shaft and onto which the slip-on section of the pipette tip is slipped. A sealing section which is made of an elastically-flexible plastic material which seals well with low withdrawal forces is provided on the attachment section. Furthermore, preferably, a fixing section is formed on the plastic material of the attachment section of the pipette shaft at a location that is axially offset relative to the sealing section. The sealing section of elastic-flexible plastic material is molded directly, retentively, on the preferably thermoplastic material of the pipette shaft.

Abstract: A motorized pipette is described for pipetting and titration of especially small amounts with an especially slow rate. An interruptable dispensing cycle allows extremely accurate titration and pipetting in which a take-up cycle is continued with an additional volume of a limited amount. Additionally, a certain minimum dispensing rate, which is preferably preset at the factory, for certain operating modes can be provided.

Abstract: A packing box for laboratory articles with a body (1) which has been produced from plastic material with a peripheral, preferably slightly conically shaped jacket (2) and a carrier plate (5) which is provided with insertion openings (3) for the laboratory articles, especially pipette tips, with a bottom (6) made of plastic material and with a cover (7) which is also made of plastic material. The carrier plate (5) is produced in one piece with the jacket (2) and the body (1) together with the carrier plate (5) have the shape of an inverted trough.

Abstract: A dispenser for a liquid, in particular, a bottle-top dispenser, with a cylinder/piston arrangement with a measuring cylinder (1) and a piston (2) which is capable of being displaced therein in a sealed manner, with a valve arrangement (3) connected to the piston (2), with an inlet valve and an outlet valve (5), each provided with a valve body (6) and a valve seat (7). The dispenser is characterized in that all of the parts or regions of the dispenser touched by the liquid are made entirely of a pure thermoplastic material or are coated with a pure thermoplastic material in such a manner that no contact is made by the liquid with the substrate coated with plastic material or with components of the substrate.

Abstract: 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 (tp) 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 (tp). Handling of the device in practice is greatly improved by the fact that the process interval (tp) is automatically determined by the control electronics by analyzing the interval(s) occurring between the individual actuations of the actuating element.

Abstract: The subject-matter of the invention is a dispenser for a liquid, in particular a bottle-top dispenser, with a cylinder/piston arrangement with a measuring cylinder (1) and a piston (2) which is capable of being displaced therein in sealed manner, with a valve arrangement (3) connected to the piston (2), with an inlet valve (4) and an outlet valve (5), each provided with a valve body (6) and a valve seat (7). Said dispenser is characterised in that all the parts or regions of the dispenser touched by the liquid consist entirely of a pure thermoplastic material or are coated with a pure thermoplastic material in such a manner that no contact is made by the liquid with the substrate coated with plastic material or with components of said substrate.

Abstract: A pipette has a preferably thermoplastic pipette shaft, for slipping on a likewise preferably thermoplastic pipette tip, has a slip-on section which opens at least slightly conically, and an attachment section which is formed on the lower end of the pipette shaft and onto which the slip-on section of the pipette tip is slipped. A sealing section which is made of an elastically-flexible plastic material which seals well with low withdrawal forces is provided on the attachment section. Furthermore, preferably, a fixing section is formed on the plastic material of the attachment section of the pipette shaft at a location that is axially offset relative to the sealing section. The sealing section of elastic-flexible plastic material is molded directly, retentively, on the preferably thermoplastic material of the pipette shaft.

Abstract: A dosing device is provided and comprises a withdrawal container and a dosing means comprising at least one dosing unit which is a piston-cylinder unit designed as a disposable member. The piston-cylinder unit discharges into a receiving container and valve means is provided to control flow into and out of the piston-cylinder unit.

Abstract: The parachute system comprises three parachutes 1-3, whose shroud lines 16 are combined into partial bundles 8-10 are articulated via articulation points 17 to articulation straps 4-7.The articulation is constructed as follows. The two partial bundles of the first parachute 1 are articulated to one articulation strap pair and the partial bundles of the second parachute 2 are articulated to the opposite articulation strap pair. The two partial bundles of the third parachute 3 are also articulated to an articulation strap of the first parachute 1 and to an articulation strap of the second parachute 2.