The invention relates to a temperature-regulating device for receiving laboratory vessels, which device has a hollow housing filled with a temperature-regulating medium. The temperature-regulating device is thermally conditioned before use, and during use the conditioned thermal energy is either received from the laboratory vessels or emitted to said vessels in a finite time sequence. The housing has a base at the bottom and opposite that at the top a receiving region which delimits the hollow inner region of the housing towards the top. Inwardly directed recesses on the receiving region serve as receptacles for the laboratory vessels to be temperature-regulated. An air space separated from the inner region is provided in the hollow housing. In the inner region, the temperature-regulating medium flows at least partially around and/or through a horizontally extending absorber element and is thermally conductively connected to the receiving region. The laboratory vessels inserted into the recesses in the receiving region are thus kept at a constant temperature by the temperature regulating medium over a relatively long time period.
B65D 81/38 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
2.
FITTING A PISTON/CYLINDER UNIT ON, AND RELEASING ONE SUCH FROM, A DISPENSER FOR RECEIVING AND DISPENSING VOLUMES OF FLUID
The present invention relates to a dispenser for receiving and dispensing volumes of fluid, on which a piston/cylinder unit (3), having a piston (7) and a cylinder (8), can be fitted in a releasable manner by means of a movement running at least substantially in the axial direction (A) of the dispenser (1). The dispenser (1) has a piston actuator (10) for moving the piston (7) relative to the cylinder (8). The piston actuator (10) is arranged in a movable manner in the dispenser (1) and driven by means of a drive (11). According to the invention, the dispenser (1) has a locking element (12), which is arranged in a movable manner in the dispenser (1) and driven by means of a further drive (13). The invention also relates to 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.
The present invention relates to a dispenser (1) for taking up and discharging fluid volumes to which a piston-cylinder unit (3), which is in the form of an exchangeable part and has a piston (5) and a cylinder (6), can be releasably attached. The dispenser (1) has a housing (2) and a device for incremental distance measurement (7) that is designed such that, when there is relative movement between the piston (5) and the cylinder (6), the distance traveled by the piston (5) relative to the housing (2) of the dispenser (1) can be determined incrementally. According to the invention, the dispenser (1) has a piston actuation member (8) which can be releasably connected to the piston (5) such that the piston (5) can be moved by means of the piston actuation member (8) in order to take up and/or discharge fluid volumes. The dispenser (1) has a position determining device (9) which has a first position element (10) and a second position element (11). The first position element (10) is fixed in or on the housing (2) of the dispenser (1). The second position element (11) is coupled so as to be able to move with the piston actuation member (8). The position determining device (9) is designed for in particular continuously sensing the position of the second position element (11).
The present invention relates to a method for detecting the type of an exchangeable piston-cylinder unit (1) for a dispenser (2). The piston-cylinder unit (1) has at least one radially oriented information carrier section (7), which at least partially specifies the type of the piston-cylinder unit (1), and at least one axially oriented information carrier section (8) which at least partially specifies the type of the piston-cylinder unit (1). The dispenser (2) comprises an acquisition device for automatically identifying the type of a piston-cylinder unit (1) arranged on the dispenser (2). The method according to the invention comprises the following steps: a) detachable mounting of the piston-cylinder unit (1) on the dispenser (2) by means of at least a movement that extends at least substantially in the axial direction (Ad) of the dispenser (2); b) detecting the completion of a successful mounting of the piston-cylinder unit (1) on the dispenser (2) by means of a sensor device; c) detecting an information of the axially oriented information carrier section (8), and d) detecting an information of the radially oriented information carrier section (7) before, after or temporally at least partially overlapping with step c).
The invention relates to a cell culture insert with a hollow cylindrical housing (8) with an upper end-face opening delimited by an opening edge (9) and a lower end-face base (10) designed as a membrane, support feet (11) which are arranged on the base-side edge of the housing (8) and/or on the base (10), which protrude downward, and by means of which the housing (8) can be placed on a support in a non-tipping manner with a small uniform spacing between the base (10) and the support, and at least one support arm (12) which protrudes outwards at the opening edge (9) and which can be placed on an edge (5') of a corrugation (3) of a corrugated plate (2). The invention is characterized in that the support arm (12) is designed as an edge hanging element and for this purpose has a support section (13) that runs radially to the housing (8) and a hanging section (14) that runs from the support section (13) downwards in the direction of the base (10) of the housing (8).
The invention relates to a housing for a laboratory device, having a floor (2), a ceiling (4), a rear wall (5), side walls (6), and a front wall (7), which together form an operating chamber (8), wherein the front wall (7) is movable upward and downward between a lowered closing position and a raised opening position in a linear and simultaneously pivoting manner and, in the opening position of the front wall (7), the operating chamber (8) is open on the front side of the housing (1). The invention is characterized in that the front wall (7) has a bottom, plate-shaped wall section (9) and a top plate-shaped wall section (11), connected to the bottom wall section (9) in a manner swiveling around a first horizontal swivel axis, in that the bottom wall section (9) has lateral guide elements (12) on or near the bottom edge, which together define a second swivel axis, parallel to the first swivel axis, for the bottom wall section (9), in that lateral guides (14) extending vertically upward are arranged to the right and left sides of the front wall (7), in that the lateral guide elements (12) run in the lateral guides (14) to move the front wall (7) and are movable upward and downward therein, in that the top wall section (11) transitions in an arc shape to a plate-shaped connection section (15) extending at an angle to the top wall section (11), or is connected thereto in an angularly rigid manner, and in that the connection section (15) is hinged in a swiveling manner to the ceiling (4) on the edge thereof distant from the top wall section (11) around a third swivel axis, parallel to the first swivel axis, at a distance from the front wall (7).
The invention relates to a pipette device having a pipette unit (1), a positioning unit (4), a micro-dosing unit (5) and a control device (6). The micro-dosing unit (5) is implemented separately from the pipette unit (1). However, it can be coupled to the pipette unit (1) in a precisely defined relative position. The pipette unit (1) thus has a coupling device (10) and the micro-dosing unit (5) has a corresponding counter-coupling device (11). One of the two devices can be switched. By switching the coupling device (10) and/or the counter-coupling device (11), the micro-dosing unit (5) can be coupled to the pipette unit (1) or decoupled from the pipette unit (1) as desired. If the micro-dosing unit (5) is coupled to the pipette unit (1), it can be moved to different operating positions together with the pipette unit (1).
The invention relates to a method for leak-testing hand-held piston stroke pipettes and a corresponding leak-testing apparatus. Essential to the system is a holder (8) for the sealed connection of a pipette tip (3) to the leak-testing apparatus. A conduit system (9) with adjacent sections of the leak-testing apparatus forms a specific connecting volume. The pipette tip (3) is evacuated to a measuring pressure below atmospheric pressure. With the vacuum pump (5) disconnected and the connecting volume sealed off, the pressure is measured over a specific time interval, and any possible rise in pressure is determined. An indication of the serviceability of the pipette (2) is generated from the pressure rise determined.
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
The invention relates to a dosing device for liquids, having a distributor rail (1) and a plurality of dosing units (2), which are hydraulically connected to the distributor rail (1), for the liquid, wherein each dosing unit (2) has a valve unit (3), which is preferably provided with a suction valve, a discharge valve and a discharge cannula (7), and also a piston-cylinder unit (8), which is detachably arranged on the valve unit (3), for sucking in the liquid and for discharging the liquid in a dosed fashion, wherein each valve unit (3) has a hydraulic connecting element for detachable hydraulic connection to the distributor rail (1), wherein the distributor rail (1) has an elongate fluid supply line which has, at the end side, an inflow connection (14) for the liquid, and laterally, dosing unit connections which are arranged so as to be distributed preferably at uniform intervals along the length, which dosing unit connections are detachably coupled to the hydraulic connecting elements of the dosing units (2). It is proposed that the distributor rail (1) is formed, as an interchangeable part, from a preferably recyclable plastic which can preferably be injection-molded.
The invention relates to a bottle attachment for handling liquids. Such a bottle attachment is generally a burette or a dispenser. Said bottle attachment regularly comprises a cylinder piston arrangement in an outside housing. The invention is characterised in that at least one actuating button (49) that can be pressed downwards for actuation 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 characterised 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.
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