Patents Assigned to Sartorius GmbH
  • Patent number: 4997051
    Abstract: A compact balance with a system carrier including a vertical plate, with a balance scale carrier including a vertical plate, whereby the plane of the system carrier and the plane of the balance scale carrier are parallel to one another, with at least three guide rods which run vertically to the plane of the system carrier and connect the balance scale carrier in the form of a parallel guide to the system carrier and with a balance scale fastened in a hinged fashion to the balance scale carrier that a lever is mounted on the system carrier which lever extends parallel to the plane of the system carrier in the space surrounded by the system carrier and the balance scale carrier and that a coupling element connects the one lever arm of the lever to the balance scale carrier whereas a coil for the electromagnetic compensation of force is fastened to the other lever arm of the lever.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: March 5, 1991
    Assignee: Sartorius GmbH
    Inventors: Gunther Maaz, Eduard Bierich, Klaus Dardat
  • Patent number: 4969997
    Abstract: The invention relates to porous membrane filters, specifically mirco- and ultraporous membrane filters, which have fluid-impermeable areas as a result of a change of their structure on one side of the membrane to a film-like state (film-formation). These filters are, for example, very suitable for an assembly in filter cartridges according to the pouring method, because they still have on the side opposite to the filmed-up side a porous structure, which offers an ideal anchoring possibility for penetrating liquid resin.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: November 13, 1990
    Assignee: Sartorius GmbH
    Inventors: Horst Kluver, Dietmar Nussbaumer, Eberhard Wunn
  • Patent number: 4938301
    Abstract: In an electronic balance with a scale on top with two guide rods which connect a load receiver to a system carrier fixed to the housing as parallel guide, with at least one translation lever which is connected to the system carrier by means of two springs and with a coupling element (9) which transfers the force corresponding to the mass of the weighed material from the load receiver to the shorter lever arm of the translation lever while the counteracting force imposes on the longer lever arm of the translation lever.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: July 3, 1990
    Assignee: Sartorius GmbH
    Inventors: Eberhard Stadler, Matthias Eger, Gottfried Nolte, Eberhard Lubke
  • Patent number: 4932487
    Abstract: An electronic balance with a calibrating weight circuit and with a digital processing unit for the automatic drive of the calibrating weight circuit that includes a proximity sensor is built into the balance and that the automatic drive of the calibrating weight circuit by the digital signal processing unit be blocked as soon as the proximity sensor emits an output signal.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: June 12, 1990
    Assignee: Sartorius GmbH
    Inventors: Franz-Josef Melcher, Dieter Berthel, Gunther Maaz, Christian Oldendorf
  • Patent number: 4930588
    Abstract: An electronic balance with a weighing scale which is connected via a parallel guide to a system carrier, and with a translation lever which is rotatably mounted on the system carrier and onto the shorter lever arm of which the force of the weight acting on the balance scale is transferred via a coupling element and on the longer arm of which the coil of an electromagnetic compensation of force is fastened, that at least one spring touches the translation lever for the purpose of astatization, the line of application of which spring passes through the point of rotation of the translation lever. This results in a compact design and a good efficiency of astatization. It is advantageous to use a wire or a band and/or a laterally jutting-out projection on the translation lever as spring.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: June 5, 1990
    Assignee: Sartorius GmbH
    Inventors: Otto Kuhlmann, Walter Sodler, Eberhard Stadler
  • Patent number: 4911842
    Abstract: In a wound filter module with an areal or flat filter band with draining support and spacing band wound around a draining means, central hollow core (K), whose longitudinal edges are enclosed in a wound state in a sealing element (4,6,4',6'), the filter band and the spacing band (1,3) are connected, resting on one another in a coinciding manner, by their two ends to a closed, that is, endless band (B1, B2, B3, B4, Bn) which encloses a central hollow core (K) or a filter core (KB1; KB1,B2;KB1,B2,B3) with its inner side and which is wound around the latter in a spiral manner. Every further, closed filter band with spacing band encloses the particular filter element (K, B1) previously formed and is wound around the latter. The fluid to be filtered and also the filtrate obtained from the individual layers can penetrate both transversally as well as tangentially in the direction of the individual spiral windings (B1 to Bn) to the hollow core (K).
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: March 27, 1990
    Assignee: Sartorius GmbH
    Inventor: Jurgen Hoffmann
  • Patent number: 4909937
    Abstract: In an integral filter (F) for separating fluid components which filter can be enclosed in a surrounding housing (1,2) with fluid connections (A1 l to A3, 10) the permeable tube jacket of which filter consists of several tubular filter elements (K1, K2) with different filter qualities whose cross sections are stepped in such a manner that a smaller filter element is surrounded by a larger filter element, optionally with formation of an intermediary space (Z1), and in which the two tube ends are enclosed by closure and connection adapters (15, 20, 21, 22, 27, 31) and can be adapted to fluid chambers (13, 14) of the housing, sections of the total filter (F) can be selectively tested for integrity, supplied with and emptied of fluid and filling substances via an intermediary space (Z1) between two filter elements (K1, K2) which intermediary space can be separately controlled and loaded from the outside.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: March 20, 1990
    Assignee: Sartorius GmbH
    Inventors: Jurgen Hoffmann, Joachim Stinzendorfer
  • Patent number: 4907179
    Abstract: An electronic balance with a digital display for the exact display of the weighing result, with an quasi analog display for the estimated display of the balance (gross) load, whereby the a quasi analog display consists of at least one horizontal band of activatable points (7), and with a taring operation, that suitable activatable segments (8, 10) be located within, directly above or directly below the first horizontal band of activatable points (7) with which such suitable segments a "T" symbol (9) can be activated at a plurality of positions along the first horizontal band and that the "T: symbol be activated during taring at the horizontal position which corresponds to said tare weight on the horizontal band (7) of the quasi analog display while a horizontal bar formed by suitable activation of activatable points indicates gross weight. This makes it possible to display in a simple manner the relative position at which taring was performed.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: March 6, 1990
    Assignee: Sartorius GmbH
    Inventors: Christian Oldendorf, Franz-Josef Melcher, Christoph Berg
  • Patent number: 4900441
    Abstract: In a small filter with a one-piece plastic housing (1) manufactured with injection-molding technology in which a filter membrane (6) is located which is connected on its edge in a leakproof manner to the housing (1), the filter membrane (6) is covered at least on one side on the edge area (6") to be sealed by the injection molding which hardens in the injection molding form and is anchored in this injection molding.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: February 13, 1990
    Assignee: Sartorius GmbH
    Inventors: Andreas Graus, Michael Schutzler
  • Patent number: 4898253
    Abstract: An electronic balance for dosing, with a measured value receiver, a digital signal processing unit, a digital entry keyboard for entering the theoretical value of a dosing, with a theoretical-weight memory and with a digital display unit with several positions after the decimal point, that switching means are present which determine the highest-value decade in which a number in the display is not equal to zero and that these switching means regulate the decoding of the display in such a manner that all zeros to the left of this decade up to the units decade are represented as a small zero "o" whereas prezeros in the 10 decade, 100 decade, etc. are entirely suppressed in a known manner. This makes possible a quasi-analog representation of the measured value which is attained in the units decade, the 10 decade, the 100 decade, etc. by means of the known suppression of prezeros even in the case of balance displays with positions after the decimal point.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: February 6, 1990
    Assignee: Sartorius GmbH
    Inventors: Christian Oldendorf, Franz-Josef Melcher, Christoph Berg
  • Patent number: 4889201
    Abstract: A drying balance is disclosed with a means (11) for supplying energy for the drying of material to be weighed located on the balance scale (6,16) and with a digital evaluating unit (23,24,25) for calculating the moisture content from the measured weight loss of the specimen and for determining the end point of the drying in which balance the digital evaluating unit (23,24,25) calculates the inflection point from the chronological course of the weight loss and derives the criterion for determining the final point therefrom. The criterion for the final point consists in that the slope of the drying curve drops below a certain value which is derived from the coordinates or the slope of the drying curve at the inflection point.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: December 26, 1989
    Assignee: Sartorius GmbH
    Inventors: Christian Oldendorf, Gunther Maaz, Klaus Nottbohm, Volker Handwerk
  • Patent number: 4890246
    Abstract: In high-resolution electric balances a certain residual temperature coefficient remains even with a good correction of the temperature-dependent errors of the measured value sensor. The invention therefore is with respect to a balance with a built-in calibrating weight (standard) which responds with a new calibration switching in said calibrating weight if a given temperature changes has been exceeded since the last calibration. To this end, the balance comprises in microprocessor digital signal processing unit a separate memory area in which the output signal representing temperature value of a temperature sensor is stored during the calibrating process and also comprises a comparator which upon instruction compares the instantaneous output signal of the temperature sensor which the value stored in this separate memory area. If this difference exceeds a given amount, a signal element indicative of need to recalibrate using the calibrating weight is actuated.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: December 26, 1989
    Assignee: Sartorius GmbH
    Inventors: Christian Oldendorf, Christoph Berg, Franz-Josef Melcher
  • Patent number: 4884645
    Abstract: In an electric precision balance with scale on top, protected against the penetration of foreign bodies and with a low-displacement measuring system (1), a parallel-guided balance scale carrier (3) for a balance scale (11) which is guided without contact through a housing opening (4) of a surrounding system housing (2) or protective cap, the balance scale carrier (3) is designed for its part with its part running upward outside of the system housing (2) as a protective hood (8) which covers the system housing (2) at least at the top and the sides and which comprises receiving bearings (9) at the low edge (8') for intermediary members (10) which support the balance scale (11), said intermediary members are surrounded without contact by casings (12) which form foreign-body baffles open at the top and the bottom which are a component of a general housing (7) surrounding the system housing (2) and said general housing comprises drainage openings (17,17') located in its low bottom parts.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: December 5, 1989
    Assignee: Sartorius GmbH
    Inventors: Erich Knothe, Franz-Josef Melcher
  • Patent number: 4863603
    Abstract: A multilayer filter medium (6) is used for separating precipitates containing cholesterol from blood plasma which consists of at least one open filter medium (7) which adsorbs precipitate and of a microporous membrane (9) which controls the pressure conditions in the filter element, whereby the layer (7) which specifically adsorbs the precipitate is hydrophobic and the microporous membrane (9) is hydrophilic. In addition, a positively charged adsorption medium (9) is provided on the side of the microporous membrane (8) facing away from the hydrophobic adsorption medium (7). In this manner, a large adsorption area is created and kept accessible for the precipitates and for heparin.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: September 5, 1989
    Assignee: Sartorius GmbH
    Inventors: Hans-Dieter Lehmann, Heinz-Gerhard Kohn
  • Patent number: 4856605
    Abstract: Solar cells (5) for the supply of electric energy are located in an electronic balance in a manner suitable for the requirements of the balance and storage means for storing the electric current generated by the solar cells (5) are present. The solar cells (5) are located, for example, in a folding cover (7) which protects the balance when it is not in use and which is folded up at the start of operation. In addition, a display (9) for the state of charge of the storage means (76) is present.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: August 15, 1989
    Assignee: Sartorius GmbH
    Inventors: Klaus Cornelius, Rainer Exner
  • Patent number: 4848477
    Abstract: The invention suggests for an electronic balance with a balance scale (1), with a parallel guide for the balance scale (1), with at least one sensor which measures the torques transferred from the balance scale (1) to the parallel guide, with storage means in the electronic circuitry of the balance in which means the magnitude of the corner-load inaccuracies of the parallel guide is stored in the form of corner-load correction factors and with switching means or program parts in the electronic circuitry of the balance which correct the weight value outputted from the measuring system on the basis of the output signals of the sensor or sensors and of the stored corner-load correction factors that controllable signals (10-13) are provided which designate the corners and sides of the balance scale (1). The signals can be formed by light sources adjacent to the balance scale (1) or in the corners or on the sides of the display field (9).
    Type: Grant
    Filed: October 19, 1988
    Date of Patent: July 18, 1989
    Assignee: Sartorius GmbH
    Inventors: Christian Oldendorf, Franz-Josef Melcher, Christoph Berg
  • Patent number: 4848494
    Abstract: Disclosed is a platform balance with a weighing scale, with at least two levers (2) which are mounted via spring joints (3) on support points (5) fixed to the housing, with a force summation part (6) which is guided in parallel by an upper and lower guide rod (7) and with coupling elements (4) which connect the longer lever arm of the levers (2) to the force summation part (6) that the shorter lever arm of each lever (2) is connected by a coupling element (13) to a load receiver (14), that each load receiver (14) is guided in parallel by an upper and a lower guide rod (15) and that the weighing scale (18) is supported on the load receivers (14). As a result thereof, deformations of the weighing scale or of its carrier construction can no longer affect the levers (2) and their lever arm ratio. In an advantageous embodiment the parallel guide of a load receiver (14) and the support points ( 5) of the associated lever (2) form a component which can be derived e.g.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: July 18, 1989
    Assignee: Sartorius GmbH
    Inventors: Klaus Cornelius, Rainer Exner
  • Patent number: 4825968
    Abstract: There is disclosed a balance based on the principle of the electromagnetic compensation of force with a cylindrical permanent magnet system, with a magnet cover and with a coil for generating the counteracting force that an emitter and a receiver of the optical position sensor be housed inside the magnet cover. The slit diaphragm of the optical position sensor, which extends from below into the area between emitter and receiver, then forms a compact unit with a carrier, e.g., the end of a translation lever, and with a coil and mutual shifts at temperature changes and temperature gradients occur only to a minimal extent.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: May 2, 1989
    Assignee: Sartorius GmbH
    Inventors: Gunther Maaz, Udo Wedeken, Eduard Bierich, Eberhard Stadler
  • Patent number: 4813505
    Abstract: It is disclosed for a balance with a scale on top based on the principle of the electromagnetic compensation of force with a system carrier fixed to the housing, with a load receiver, with two guide rods which connect the load receiver to the system carrier in a vertically movable direction as parallel guide, whereby the stem carrier, the two guide rods and the load receiver are designed as a one-piece casting, with a translation lever and with a coupling element between load receiver and translation lever, whereby the force from the load receiver corresponding to the mass of the weighed material is transferred via the coupling element to the shorter lever arm of the translation lever and the coil of the electromagnetic compensation of force is fastened to the longer lever arm of the translation lever that the system carrier comprise lateral projections which extend into the area between the guide rod arms.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: March 21, 1989
    Assignee: Sartorius GmbH
    Inventors: Walter Sodler, Eberhard Lubke, Otto Kuhlmann
  • Patent number: 4811293
    Abstract: Method and apparatus of storing data in an electrically erasable memory connected to a microprocessor to effectively protect data stored in the memory from being unintentionally overwritten in cases of defective operation of the microprocessor, an overwrite protection system consisting of a write protect flip-flop (1) whose two logical states signify "with write protection" and "without write protction" and also a gate (3) in the write line which is controlled by the write protect flip-flop and in whose logical "with write protection" state, write errors are prevented from being conducted to the individual memory locations, and, finally a mechanical switch element (5) whereby these components are connected in such a manner that the write protect flip-flop (1) can only be brought into the one logical "with write protection" state by the microprocessor, while it can only be brought into the other logical "without write protection" state, if and when the mechanical switch element (5) is actuated.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: March 7, 1989
    Assignee: Sartorius GmbH
    Inventors: Erich Knothe, Franz-Josef Melcher