Including Driven Means At Least Partially External Of Bowl For Moving Material Thereto Or Therefrom Patents (Class 494/42)
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Patent number: 5449022Abstract: Hose arrangement for a seal-less centrifuge having a soft inner layer and a hard outer layer and is formed by means of coextrusion.Type: GrantFiled: March 30, 1994Date of Patent: September 12, 1995Assignee: Fresenius, A.G.Inventors: Friedrich Witthaus, Carlo Lay, Wolfgang Biesel
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Patent number: 5273517Abstract: A fluid flow apparatus includes a peristaltic pump rotor mounted to a deck module assembly. A disposable software set is provided which includes a cassette which has a primary flexible tube and a pump platen adjacent to which the primary flexible tube resides. Tubing with blood processing bags are coupled to the manifold along with the input port of the rotor of a disposable blood processing centrifuge bowl. The cassette is removably secured to the hardware apparatus such that the flexible tube contacts both the platen of the cassette and the rollers of the pump rotor. The pump rotor is rotated to induce a fluid flow through the primary flexible tube. The software set also includes a three-to-one manifold which connects the primary tube to a plurality of secondary flexible tubes. Fluid flow through the secondary flexible tubes is controlled by a plurality of pinch valves which pinch the secondary tubes closed against closing surfaces on the cassette.Type: GrantFiled: July 9, 1991Date of Patent: December 28, 1993Assignee: Haemonetics CorporationInventors: David Barone, Russell Herrig, Edward Kaleskas, Ronald Porreca, Alan L. Stenfors, Robert Vandor, Joseph M. Medberry, Paul M. Volpini
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Patent number: 5250180Abstract: An apparatus for recovering oil from used lubricant includes a centrifugal separation unit having a centrifugal tank for receiving and separating used lubricant and a scraping unit having blades provided in the tank for scraping contaminant from the inner side of the wall of the tank. A synchronizing mechanism is provided for simultaneously rotating the tank and the blades at different rates to cause the blades to scrape the contaminant.Type: GrantFiled: November 10, 1992Date of Patent: October 5, 1993Assignee: FWU Kuang Enterprises Co., Ltd.Inventor: Yun-Te Chang
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Patent number: 5190515Abstract: An apparatus for degassing a continuously flowing liquid stream comprising an air-tight housing, in which is mounted for rotation a centrifuge bowl of circular cross-section and having an inner surface for spreading centrifugally impelled liquid to be degassed and an annular peripheral trough for retaining centrifugally impelled degassed liquid. The liquid stream is fed into the bowl and the degassed liquid is withdrawn through a tube extending from an exit line outside the housing to an open end of elongate cross-section which is positioned within the trough of the bowl and is immersible in the degassed liquid. The apparatus further provides for measuring the pressure of the exiting degassed liquid, the pressure measurement being used to regulate the flow of liquid into the bowl so as to maintain a substantially constant level of liquid therein.Type: GrantFiled: January 13, 1992Date of Patent: March 2, 1993Assignee: Eastman Kodak CompanyInventors: Donald E. Eaton, Errol S. Francis, Eric L. Dillenbeck, Lawrence D. Meston, Walter Johannes
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Patent number: 5160310Abstract: In a centrifuge rotor there is formed a separation chamber (4) having an inlet (24) for a mixture of components to be separated and two outlets (21,23) for the respective separated components. A partition (7) is arranged to divide the separation chamber (4) in two elongated compartments (29, 30) situated at different distances form the rotor axis. A displacement member is arranged to displace the separated heavy component in the circumferential direction of the rotor through the radially outer one of said compartments to and out through the outlet (23) for heavy component.Type: GrantFiled: July 29, 1991Date of Patent: November 3, 1992Assignee: Centritech ABInventor: Carl Yhland
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Patent number: 5104371Abstract: The internal cleaning of a centrifuge rotor is performed by a cleaning liquid is which pumped from a tank via an inlet channel to a central inlet chamber of the rotor during rotation thereof. A separation chamber is connected to the inlet chamber and, at different radial levels, to two outlet chambers via separate outlet passages. Cleaning liquid is discharged from the outlet chambers through a stationary discharge device having separate outlet channels. Part of the cleaning liquid discharged through the outlet channels is returned to the tank via a return conduit. The rest of the cleaning liquid is conducted directly to the inlet channel by means of an overpressure generated in the stationary discharge device. Thereby, it is possible to clean the rotor internally even very close to its rotational axis.Type: GrantFiled: April 3, 1990Date of Patent: April 14, 1992Assignee: Alfa-Laval Marine & Power Engineering ABInventor: Fredrik Ajnefors
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Patent number: 5053025Abstract: An apparatus for extracting blood fluids from a placenta and umbilical cord comprises a frame assembly, a rotary carriage mounted to the frame assembly for rotation about a vertical axis, a drive operatively connected to the carriage for rotating the carriage about the axis, and a support for holding the placenta and the umbilical cord. A connector pivotably connects the support to the carriage to enable a pivoting of the support about a rotating horizontal axis during rotating of the carriage by the drive, while a collector is attached to the support for enabling a collection of fluid flowing from the placenta and the umbilical cord during operation of the drive. A fluid delivery system is provided for automatically supplying an anticoagulant to extracted blood fluid.Type: GrantFiled: September 4, 1990Date of Patent: October 1, 1991Assignee: Cryo-Cell International, Inc.Inventor: Hermann Knippscheer
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Patent number: 5041076Abstract: A multi-stage rotary inertial device and method in which rotary inertial thermodynamic impedance is used in the separation of materials according to their diferences in mass. Thus, an input flow composed of substances having two different masses is separated into two output flows having preferred concentrations, respectively, according to their different masses. Rotary inertial thermodynamic pumping is used for operation of intermediate separator stages. This can be controlled from outside the rotating device by selectively supplying heat to the rotating device.Type: GrantFiled: May 12, 1989Date of Patent: August 20, 1991Inventor: Frederick W. Kantor
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Patent number: 5000730Abstract: A screw joint between two components, such as the rotor (3) and a lid locking ring (5) of an ultracentrifuge. During rotation the forces transferred by the screw joint and/or the centrifugal forces acting on the components tend to give rise to uneven distribution of the load between the threads of the screw joint. For distributing the forces transferred by the screw joint more uniformly, one of the components (3, 5) includes, a part (7) intended to be deformed due to the rapid rotation of the component to strive to rotate the component about axes perpendicular to axial sections through the center axis of the screw joint. In this way, variable contributions to the radial deformation of this component are produced along the axial extension of the screw joint, so that the load distribution is equalized between the screw threads.Type: GrantFiled: November 28, 1988Date of Patent: March 19, 1991Assignee: AB Kompositprodukter S.K.-F.M.Inventor: Arne Back
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Patent number: 4936820Abstract: A centrifugal processing system for cultured cellular suspensions comprises a reservoir for pooling a desired volume of the cellular suspension from a plurality of individual containers in which the cellular suspension have been cultured. A centrifugation chamber is provided operative in response to centrifugal force for separating the cellular suspension into a cellular component and a supernatant. Fluid is conveyed from the reservoir into the centrifugation chamber at a high flow rate exceeding 1 liter per minute. The cellular component and supernatant are collected from the centrifugation chamber.Type: GrantFiled: September 5, 1989Date of Patent: June 26, 1990Assignee: Baxter International Inc.Inventors: T. Michael Dennehey, Stanley J. Pernic, Joseph C. West, Jr.
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Patent number: 4865081Abstract: Multi-lumen tube arrangement for use in a sliding-seal-free centrifuge comprising a plurality of equilength individual tubes (12, 14, 36, 38, 40, 42) which after a twisting about the longitudinal axis of the tube arrangement (10) are each held fixed free of tension at their ends (16-18).Type: GrantFiled: September 18, 1987Date of Patent: September 12, 1989Assignee: 501 Fresenius AGInventors: Hans-Jurgen Neumann, Wolfram Weber
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Patent number: 4753632Abstract: A device for separating fine particles of solid matter from waste fluid has a water ring pump (16, 44), an air separator (18, 60) and a solid bowl centrifuge (24, 30) which are arranged axially one behind the other in the aforementioned sequence and are driven by the motor shaft (28) of a common drive motor (12).Type: GrantFiled: November 25, 1986Date of Patent: June 28, 1988Assignee: Durr Dental GmbH & Co KGInventors: Hans-Joachim Hofmann, Andreas Bollmann, Walter Durr
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Patent number: 4661243Abstract: In an apparatus for processing moist dust and mud from dust removal equipment, especially in the steel industry, wherein the mud is concentrated, fractionated and dewatered in several steps the mud is dewatered in a centrifugal separator, to allow the mud from the dust removal equipment of blast furnaces and steel works to be dewatered in an environmentally acceptable and simple and cost effective way.Type: GrantFiled: February 21, 1985Date of Patent: April 28, 1987Assignee: Hoesch AktiengesellschaftInventors: Rainer Hotz, Herbert Muszkiewicz
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Patent number: 4459169Abstract: A rotatable processing bowl assembly adapted for mounting in a centrifuge includes an umbilical tubing system formed of a plurality of individual flexible tubes each of which communicates with the processing bowl. Each tube has an exterior wall and includes a first portion extending adjacently from the bowl and a second portion which is spaced from the bowl. The exterior walls of the tubes are bonded together along their first portions so that the joined exterior walls collectively define the outer periphery of the tubing system along the first portions of the tubes. Preferably, the tubes are also wound to form a predetermined helical pattern along their first portions. This arrangement enhances the tubing system's durability and resistance to fatigue along the bonded together first portions, particularly at higher rotational speeds, and permits direct, facile connection of the free and unattached second portions with external apparatus.Type: GrantFiled: March 23, 1983Date of Patent: July 10, 1984Assignee: Baxter Travenol Laboratories, Inc.Inventors: David V. Bacehowski, Ronald Bucheger
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Patent number: 4389206Abstract: A rotatable processing bowl-type apparatus for separating blood components where a plurality of flexible umbilical tubes are positioned to establish communication with a processing bowl at one end thereof. Certain segments of each of the cables are stiffer than other segments of the same cables for improved life and performance. Also, outer portions of portions of the cables are impregnated with silicone oil.Type: GrantFiled: March 16, 1981Date of Patent: June 21, 1983Assignee: Baxter Travenol Laboratories, Inc.Inventors: David V. Bacehowski, Michael J. Brown
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Patent number: 4389207Abstract: A rotatable processing bowl assembly adapted for mounting in a centrifuge includes an umbilical tubing system formed of a plurality of individual flexible tubes each of which communicates with the processing bowl. Each tube has an exterior wall and includes a first portion extending adjacently from the bowl and a second portion which is spaced from the bowl. The exterior walls of the tubes are bonded together along their first portions so that the joined exterior walls collectively define the outer periphery of the tubing system along the first portions of the tubes. Preferably, the tubes are also wound to form a predetermined helical pattern along their first portions. This arrangement enhances the tubing system's durability and resistance to fatigue along the bonded together first portions, particularly at higher rotational speeds, and permits direct, facile connection of the free and unattached second portions with external apparatus.Type: GrantFiled: March 16, 1981Date of Patent: June 21, 1983Assignee: Baxter Travenol Laboratories, Inc.Inventors: David V. Bacehowski, Ronald Bucheger
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Patent number: 4365741Abstract: A centrifuge method and apparatus particularly useful for desulfurizing slurry coal, and for removing mineral impurities therefrom, so that such coal may be more economically transported in pipeline systems. A slurry of finely-divided coal and impurities is forced upwardly at a predetermined velocity into the chamber of a rotating centrifuge rotor having frusto-conical upper and lower inner surfaces disposed with their apexes meeting along an intermediate apex line. Rotational movement is imparted to the upwardly-directed stream, and coal particles (i.e., particles of lower specific gravity) follow a trajectory leading them into contact with the upper frusto-conical surface, whereas impurities (particles of greater specific gravity) follow a trajectory leading to the lower frusto-conical surface.Type: GrantFiled: January 30, 1981Date of Patent: December 28, 1982Assignee: Iowa State University Research Foundation, Inc.Inventors: Raymond T. Greer, Ronald F. Gibson