Abstract: A measuring apparatus (1) for determining the flow (Q) of a fluid (2). The apparatus has a hollow body (3), with an inflow (4) and an outflow (5) for the fluid (2). A magnetic sample (6) is movably arranged in the hollow body (3) and can be acted upon with a working pressure by the fluid (2). The measuring apparatus (1) further has at least one position sensor (7) to determine the position of the magnetic sample (6), an electromagnet (8) to exert a magnetic force on the magnetic sample (6), and a control device (9) for the electromagnet (8) which is connected signal-wise to the position sensor (7). The control device (9) includes regulating means (10) which control the electromagnet (8) with the aid of a signal of the position sensor (7) so that the magnetic sample (6) is held in a position (X) against the working pressure, with the magnetic sample (6) being designed and arranged such that the fluid (2) can flow through the hollow body (3) from the inflow (4) to the outflow (5).

Abstract: A method for floating at least one substance for growing a tissue part in a bioreactor. The method includes providing at least one substance consisting of one of a tissue part, a scaffold having cells deposited thereon, and a scaffold including a tissue part thereon. The method further includes further acting upon the substance with fluid, wherein the fluid holds the substance in free floatation. The fluid flows in a direction counter to gravity when a density of the substance is greater than a density of the fluid, and in a direction counter to buoyancy when a density of the substance is less than a density of the fluid. The bioreactor for floating at least one substance for growing a tissue part includes a container including a first flow chamber and at least one substance consisting of one of a tissue part, a scaffold having cells deposited thereon, and a scaffold including a tissue part thereon. The substance is acted upon with fluid. The bioreactor further includes an apparatus for conveying the fluid.

Abstract: A filter apparatus is provided for the filtering of substances from a fluid having a filter housing (2) which bounds a filter space (6) and which has an inlet (3) and an outlet (4) for the fluid to be filtered and having a filter element (5) which is provided in the filter space (6) and which is designed and arranged such that the filtering fluid can only flow through the filter element (5) from the inlet (3) to the outlet (4) of the filter housing (2) in operation, wherein a heating device (10) is provided for the heating of the fluid which includes a microwave source (11) in order to act on the fluid by microwaves.

Abstract: The magnetic stirring apparatus (1) comprises an agitator (1a), at least one permanent magnet (1d, 1e) and a float body (1f), which are connected to one another.

Abstract: In a method for the determination of the viscosity (&eegr;) of a liquid, e.g. of blood, which is forwarded by a pump, e.g. a blood pump, said pump having a rotor for the forwarding of the liquid from the inlet of the pump to the outlet, the rotor is used for the determination of the viscosity (&eegr;). For the determination of the viscosity (&eegr;) of the liquid no spatial deflection of the rotor from its operating position takes place, but rather the rotor is left in its operating position and the viscosity (&eegr;) is determined from measurement parameters of the pump or of the rotor respectively.

Abstract: A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a flow connection (4). A rotary pump (1) is used as the pump apparatus and the rotary pump (1) is operated at an efficiency which is less than half the maximum efficiency (&eegr;max) of the rotary pump (1).

Abstract: A bioreactor with a reaction container (1, 1a, 1b, 1c) for a substance (C) to be acted upon with a medium has a pump (5, 5a, 5b, 5c, 5d) for conveying the medium. The pump is designed as an expendable pump or, respectively, parts (53d, 54d, 55d) of the pump are designed as expendable parts.

Abstract: An apparatus and a method for determining the viscosity of a fluid includes an electrical rotary drive (2) with a stator (3), which has a stator winding (4), and with a rotational body (5) which can rotate in the fluid (1). The rotational body (5) is designed as a rotor (5) of the rotary drive (2) and is magnetically journalled in a contact-free manner with respect to the stator (3).

Abstract: A gas forwarding apparatus for respiration and narcosis devices including a radial compressor and a drive apparatus which produces a magnetic rotary field, with the radial compressor including a housing within which a compressor wheel and a rotor which is connected thereto are arranged, with the drive apparatus being arranged outside the housing and with the drive apparatus and the rotor being designed to be mutually matched and arranged in such a manner that the rotor can be driven by the drive apparatus.

Abstract: In the method for the determination of the pressure (p) in and/or of the through-flow (Q) of a liquid through a pump having at least one magnetic bearing for the axial journaling of the pump rotor (1), axial forces act on the rotor (1) of the pump during operation. The axial forces which act on the rotor are utilised for the determination of the pressure (p) and/or of the through-flow (Q).

Abstract: A dispensing apparatus is proposed for a fluid having a supply tank (2) for the fluid which has an outlet (4) which can be connected to a pressure line (5) for the fluid (F), and having a rotary pump (3) which has a rotor (31) for conveying the fluid (F) into the pressure line, with the rotor (31) for the mixing of the fluid being arranged directly in the outlet (4) of the supply tank (2).

Abstract: An electromagnetic rotary drive, designed as bearingless motor, is proposed which comprises a magnetically journalled rotor (3) and a stator (2) which comprises a drive winding for producing a magnetic rotary drive field which produces a torque on the rotor (3), and a control winding for producing a magnetic rotary control field by means of which the position of the rotor (3) with respect to the stator (2) can be regulated, with the stator (2) having exactly six stator teeth (21).

Abstract: A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a flow connection (4). A rotary pump (1) is used as the pump apparatus and the rotary pump (1) is operated at an efficiency which is less than half the maximum efficiency (&eegr;max) of the rotary pump (1).

Abstract: In a process chamber (1), in which various processing steps in the manufacture of semiconductors can be carried out, there is arranged a rotationally drivable rotary head (3) which serves as a holder for a substantially disc-shaped object to be processed (W), e.g. for a wafer. Furthermore, at least one applicator (50, 51, 52, 53) is provided in the process chamber (1) for the provision of a medium which acts on the object to be processed (W). Means (4) are arranged radially around the rotary head (3) for the journalling and for the driving of the rotary head (3).

Abstract: A clamping apparatus for clamping off a hose in a fluid system for biological liquids, in particular blood, which has a movably arranged closing member having a closing piece for clamping off the hose, having permanent magnetic holding device which is arranged and designed in such a manner that it can hold the closing member against a force in two different stable equilibrium positions, namely an open position and a closed position, without it being necessary to supply energy to the permanent magnetic holding device for the holding in the respective equilibrium position, and having actuation means in order to move the closed member out of the open position into the closing position.

Abstract: A radial, active magnetic bearing apparatus comprising at least three electromagnets which are distributedly arranged is excited by a three-phase rotary current controller.

Abstract: A sensor arrangement in an electromagnetic rotary drive which is designed as a bearing-free motor with a magnetically journalled, permanent magnetic rotor (1) and a stator (2), the sensor arrangement serving for the determination of the direction of the rotor magnetization and/or of the axial position of the rotor (1), comprises at least two sensors (S1, S2, S3) for the determination of a magnetic flux. The two sensors (S1, S2, S3) are arranged in such a manner with respect to the rotor (1) that partial fluxes of that magnetic field which the stray field of the permanent magnetic rotor (1) produces can be determined with them. Furthermore, a method for the determination of the direction of the rotor magnetization is proposed.

Abstract: An electrical rotary drive, designed as a bearingless motor, has a magnetically journalled rotor (3) and a stator (2) which comprises a drive winding (6) having at least two loops (61, 62) for producing a magnetic drive field which produces a torque on the rotor (3), and has a control winding (7) having at least three loops (71, 72, 73, 74) for producing a magnetic control field by means of which the position of the rotor (3) with respect to the stator (2) can be regulated, with each loop (61, 62) of the drive winding (6) belonging to a different electrical drive phase and each loop (71-74) of the control winding (7) belonging to a different electrical control phase, and having a setting device (4) which supplies each loop (61, 62) of the drive winding (6) and each loop (71-74) of the control winding (7) with a phase current or a phase voltage as a setting parameter, with the setting device (4) being designed in such a manner that the setting parameter for each loop (61, 62) of the drive winding (6) and for e

Abstract: A magnetic bearing apparatus for the journalling of a body (3), in particular of a rotor (3), comprises a stator (2) with a control winding (22) having at least three loops (22a, 22b, 22c) for the production of a magnetic control field by means of which the position of the body (3) relative to the stator (2) can be regulated, with each loop (22a, 22b, 22c) belonging to a different electrical phase, and a control device (4) which in a first operating mode supplies each loop (22a, 22b, 22c) with in each case a phase current (Ia, Ib, Ic) or in each case a phase voltage (Ua, Ub, Uc) as a control parameter. Means are provided in order to regulate the control parameter for each loop (22a, 22b, 22c) independently of the control parameter for the other loops (22a, 22b, 22c) as well as a monitoring unit (5) which can switch the bearing apparatus into a second operating mode in which a reduced number of phases, which is at least two, produces the magnetic control field.

Abstract: A permanent magnetically excited electrical rotary drive for a blood pump is proposed, comprising a permanent magnetic rotor and a stator, said stator comprising a drive winding having at least two loops for the production of a magnetic drive field which produces a torque on the rotor, with each loop belonging to a different electrical phase, furthermore comprising a setting device which supplies each loop in each case with a phase current or in each case with a phase voltage as a setting parameter, with the setting device comprising a separate power amplifier for each loop so that the setting parameter for each loop can be regulated independently of the setting parameter for the other loops.