Patents Assigned to Eduard Fresenius Chemisch Pharmazeutische Industrie KG
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Patent number: 4387879Abstract: A connector which is adapted to be connected to a plastic cannula or a vein catheter comprises a tubular and/or conical portion that is adapted to be tightly joined to a parenteral solution supply needle and/or to a hose provided with a cone fitting. To ensure that a metal cannula or a vessel catheter can be pushed through the connector without obstruction and that the connector closes automatically as soon as the metal cannula or the catheter or the cone fitting of a supply hose has been pulled from the connector, the body of the latter is provided with a receptable, which is radial with respect to the flow passage, and a disc consisting of elastomeric material and having a central slit is held in said receptacle and blocks the flow passage.Type: GrantFiled: July 16, 1981Date of Patent: June 14, 1983Assignee: Eduard Fresenius Chemisch Pharmazeutische Industrie KGInventor: Stefan Tauschinski
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Patent number: 4330080Abstract: A separator shaped like a plate, for an ultracentrifuge, comprises centrally arranged inlet and outlet nipples (5, 6, 7, 8) opening axially outwardly. A ring channel (11) is arranged near the circumference of the plate (1) and extends along or near substantially the entire circumference. One end, the inlet end, of the ring channel is connected through a respective radially extending duct (10) to the inlet nipple (5). The other end of the ring channel (11) opens into at least one separation zone (17) which is widened relative to the ducts. The separation zone (17) is connected through approximately radially further ducts (12, 14, 15) to the outlet nipples (6, 7, 8). Peeling edges (18, 20, 21) project into the separation zone (17) and form a radially outwardly located boundary of the inflow areas of the connecting ducts (12, 14, 15). These ducts (12, 14, 15) merge into the separation zone (17) behind the peeling edges at different radial spacings in the rotational direction (9).Type: GrantFiled: November 13, 1980Date of Patent: May 18, 1982Assignee: Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG Apparatebau KGInventor: Bernd Mathieu
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Patent number: 4275726Abstract: Apparatus for removing fluid from and supplying fluid to the human body in substantially equal quantities includes a double tube pump (1), a measuring chamber (2), and a supply container (4), the pump being arranged to deliver fluid from the supply container to the body by a line (13) while removing fluid at an equal rate from the measuring chamber, which receives fluid from the body by a line (1). The measuring chamber is provided with sensing means (8,9) which supply signals in response to variations in the level of fluid in the measuring chamber to a controller (7) which controls the pump motor speed. For use in diuresis and haemofiltration, an additional single pump (14) in a discharge line (16) from the measuring chamber is controllable by a device (18) to remove excess fluid from the measuring chamber. The double pump is the same as that described in U.S. Pat. No. 4,108,575.Type: GrantFiled: December 4, 1978Date of Patent: June 30, 1981Assignee: Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG Apparatebau KGInventor: Wilfried Schael
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Patent number: 4274964Abstract: A dialyzer is formed by first placing a film strip into a membrane hose and then simultaneously folding the hose and a netting intermediate layer so that the folds of the hose and the folds of the netting extend crosswise relative to each other in a mutually interlocking manner. The facing ends of the hose layers are then sealed with a curable sealing compound and severed. Then the film strips are withdrawn from the hoses in the so formed package. The resulting product is a dialyzer or hemofilter, depending on the type of membrane hose used, in which the facing ends of the membrane hoses are open for the passage of blood therethrough, after the withdrawal of the film, and in which the netting layers are located between adjacent hoses.Type: GrantFiled: August 9, 1979Date of Patent: June 23, 1981Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventors: Gerd Krick, Peter Konang, Jan-Erik Sigdell, Klaus Heilmann
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Patent number: 4261830Abstract: The present blood exchange apparatus comprises a plurality of main layers acked to form a package. Each main layer includes a membrane envelope enclosing an intermediate netting layer. Spacers space the main layers so that blood may flow between adjacent main layers and an exchange liquid may flow within the intermediate netting layers. The facing ends of a package are embedded in a pourable sealing compound in such a manner that the spaces between adjacent membrane envelopes are open. After securing the spacers to each facing end of the main layers, the spacers and thus the layers are connected and then dipped into a curable sealing compound. The spacers have corner extensions which extend out of the sealing compound. Holes in the corner extensions expose the intermediate netting layers.Type: GrantFiled: October 22, 1979Date of Patent: April 14, 1981Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG Apparatebau KGInventors: Wilfried Schael, Peter Konang, Gerd Krick
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Patent number: 4256561Abstract: An electrochemical measuring electrode has an ion-selective membrane and direct potential take off via an electron conductor. A diffusion barrier layer is provided between the membrane and the electron conductor for the purpose of reducing or eliminating the sensitivity to faults which can be caused by the presence of gases in a medium which is to be analyzed and into which the sensor is introduced. The diffusion barrier preferably comprises an ion-conducting solid-state body having a high diffusion resistance to oxygen.Type: GrantFiled: May 8, 1979Date of Patent: March 17, 1981Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventors: Johannes G. Schindler, Wilfried Schal
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Patent number: 4252115Abstract: Apparatus for rinsing body cavities includes a double tube pump (1) for simultaneously pumping fluid into a storage vessel (4) for subsequent feed through a catheter (K) and pumping discharged fluid from a measuring vessel (9) at the same rate, so that surplus fluid with the discharge can be measured. The measuring vessel has sensors (11,12) which switch on and switch off the pump when fluid in the measuring vessel falls or rises to predetermined levels. An additional pump (13) may be provided for the surplus fluid extraction. The double tube pump comprises a pair of parallel identical tubes (24a, 24b) with joined end connections (34,35) in a stator (21) which are squeezed by common rollers (32) mounted in a rotor (27).(FIG.Type: GrantFiled: December 4, 1978Date of Patent: February 24, 1981Assignee: Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG. Apparatebau KG.Inventor: Wilfried Schael
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Patent number: 4251769Abstract: The present electronic indicator or display device is equipped with adjustable upper and/or lower limit value markers to provide a respective alarm if such limit values are exceeded or not reached. The display itself comprises an electronic circuit and optical display elements such as light emitting diodes connected to the display circuit. An input to the display circuit is adapted to receive rated or limit value input signals which are displayed as respective markers and the position of which is adjustable. A time multiplexing circuit controls the timed sequence of the signals supplied to the display elements. A comparator compares the measured signal value with the rated value or values and monitors the proper function of the system.Type: GrantFiled: April 5, 1979Date of Patent: February 17, 1981Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventors: Horst Ewert, Wilfried Schael
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Patent number: 4243530Abstract: A haemofiltration apparatus includes a combined blood pump (1a) and filtrate pump (1b). The pressure on the inlet side of the filtrate pump may be adjusted by a cone valve (14) mounted on a diaphragm (12) which opens to admit air when the inlet pressure falls below a predetermined value which is set by a valve spring (16) provided with an adjustment screw (15). The other side of the diaphragm may be connected to the atmosphere or to an air trap (6) in the blood pump circuit.Type: GrantFiled: December 4, 1978Date of Patent: January 6, 1981Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventors: Kurt Lehnhoff, Wilfried Schael
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Patent number: 4242191Abstract: An ion-sensitive sensor has an electron-conducting electrode and a membrane for determining the selectivity which is arranged to come into contact with a medium to be analyzed. The membrane is applied to an ion-conducting layer of glass which is in connection with the electron-conducting electrode via an ion-conductor. The membrane preferably comprises at least one organic polymer, such as PVC, having ion-active components, such as organic carrier molecules, selective ligands or ion exchangers, embedded therein. The layer of glass may also have ion-selective properties.Type: GrantFiled: May 8, 1979Date of Patent: December 30, 1980Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventors: Johannes G. Schindler, Wilfried Schal
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Patent number: 4240408Abstract: In peritoneal dialysis apparatus, flushing liquid is pumped into a supply vessel (4) which is then emptied into the body cavity through a valve (5) and a catheter (6). The supply vessel is then refilled while the cavity is drained back through the catheter into a receptacle (11) of the same weight and dimensions as the supply vessel. The supply vessel and receptacle are suspended at opposite ends of a balance beam (12) and when they are in balance after the receptacle has been filled, a valve (8) isolates the receptacle from the catheter and surplus fluid from the cavity is collected in a measuring vessel (15) through a valve (9), the receptacle being emptied through a valve (10).Type: GrantFiled: December 4, 1978Date of Patent: December 23, 1980Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventor: Wilfried Schael
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Patent number: 4231366Abstract: The present blood flow monitoring and control apparatus is especially use in connection with the so-called single needle technique, for example, for treatments such as dialysis, perfusion, or diafiltration. The blood pressure control is accomplished by a measuring chamber including a pressure equalizing device operatively connected between the blood cleaning apparatus and the blood pump. Sensors are operatively connected to the volume measuring chamber. The volume sensors provide electric control input signals to a control circuit which in turn controls the blood pumps and/or valves. A reading may be provided on a display or an alarm may be given when the blood pressure or blood quantity or volume is not within predetermined limits as calculated by an electronic computer.Type: GrantFiled: August 8, 1977Date of Patent: November 4, 1980Assignee: Dr. Eduard Fresenius Chemisch-Pharmazeutische Industrie KG Apparatebau KGInventor: Wilfried Schael
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Patent number: 4206027Abstract: A multiple measurement system for the electrochemical analysis of fluids and gases includes a housing adapted to receive a plurality of isolating members which are firmly held in position in the housing. The housing and isolating members are adapted to receive measurement-probes, each of which extends into the isolating member and is in intimate contact with a measurement chamber provided therein. Inflow and outflow openings or channels communicating with the measurement chamber are provided in the insulating members. The end surfaces of each insulating member and the contact surface of a pair of end members are frusto-conically shaped to provide intimate contact between touching surfaces of the isolating and end members. The inflow and outflow channels or openings provided in the isolating members and end members are in alignment and provide a continuous fluid flow path from input to output.Type: GrantFiled: June 13, 1978Date of Patent: June 3, 1980Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatatebau KGInventors: Johannes G. Schindler, Wilfried Schal, Heinz E. Braun
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Patent number: 4172794Abstract: A hollow fiber dialyser comprises a webbing of hollow fibers. A loose warp hread at each end of a webbing wound on a core, acts as a wick barrier to prevent sealant from leaking into the interstices between the hollow fibers. A tight warp thread nearest the open ends of the fibers pinches off the free inner cross section of each hollow fiber to prevent sealant from penetrating into the hollow fibers.Type: GrantFiled: April 27, 1978Date of Patent: October 30, 1979Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG Apparatebau KGInventor: Jan-Erik Sigdell
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Patent number: 4141835Abstract: The present mass transfer apparatus between two media is especially adapted to blood dialysis. To assure an undisturbed flow of the blood through the dialyser and to avoid coagulation all flow channels are shaped to avoid dead corners and choking zones so that the blood is prevented from forming wakes or so-called "dead waters" in its flow path. For this purpose a hollow space is formed adjacent to the open ends of the hollow fibers. The inlet and/or outlet to this hollow space may extend radially axially or tangentially.Type: GrantFiled: October 11, 1977Date of Patent: February 27, 1979Assignee: Dr. Eduard Fresenius Chemisch-Pharmazeutische Industrie KG Apparatebau KG.Inventors: Wilfried Schael, Jan-Erik Sigdell, Gerd E. Krick
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Patent number: 4101648Abstract: The invention relates to a composition for carrying out a uric acid load t for the differential diagnosis of diseases of the purine metabolism. The composition comprises a mixture of adenine and guanine, preferably in equal quantities, incorporated in a carrier, preferably comprising amorphous silicic acid.Type: GrantFiled: August 23, 1976Date of Patent: July 18, 1978Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KGInventor: Horst Ulbrich
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Patent number: 4053420Abstract: A blood filter for removing dead blood corpuscles, conglomerations of blood orpuscles and foreign components from the blood comprises dense wadding formed from a plastics monofilament or a bundle of long plastics threads.Type: GrantFiled: April 12, 1976Date of Patent: October 11, 1977Assignee: Dr. Eduard Fresenius Chemisch-Pharmazeutische Industrie KG.Inventor: Gunter Helmut Marx
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Patent number: RE31029Abstract: A dialyzer with a housing includes a pair of inflow and outflow pipes for blood and dialysis solution, and a tubular ring body formed from a plurality of hollow filaments joined to one another at their ends and positioned in the housing such that one pair of the pipes is in communicating relationship with open ends of the hollow filaments and the other pair of the pipes communicates with the interstices between adjacent filament forming said tubular ring body. The invention also provides a dialyzer cartridge and a method of manufacturing such cartridge.Type: GrantFiled: December 1, 1980Date of Patent: September 14, 1982Assignee: Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie KG, Apparatebau KGInventor: Wilfried Schael