Forschungszentrum Karlsruhe GmbH Patent applications |
Patent application number | Title | Published |
20100273328 | METHOD FOR PRODUCING AN ORGANOMETALLIC LAYER - A method for producing an organometallic layer includes providing a substrate having at least a layer with atoms of an oxidizable metal on its surface. The surface is exposed to a fluid that includes organic molecules having at least two functional groups that contain elements of main group VI such that the atoms of the oxidizable metal form a bond with the organic molecules. By consumption of the atoms of oxidizable metal and of the organic molecules, the organometallic layer is formed on the substrate at locations on the surface of the substrate where the atoms of oxizable are disposed, the atoms of oxizable metal being incorporated into the organometallic layer. A thickness of the organometallic layer is determined by a duration of the exposing, a thickness of the layer including the atoms of the oxidizable metal, and the number of organic molecules in the fluid. | 10-28-2010 |
20100225928 | DEVICE FOR MEASURING STRUCTURES OF AN OBJECT - A device for measuring structures of an object. The device includes a probe element extending from a probe extension, an optical sensor for capturing an image of the probe element on a sensor field, an evaluation unit configured to compute the structures based on a position of the optical sensor relative to a coordinate system of a coordinate measuring machine and from a position of the probe element measured by the optical sensor. The device also includes a lens disposed on the probe extension between the optical sensor and the probe element. | 09-09-2010 |
20100167917 | METHOD FOR PRODUCING A HYDROGEN STORAGE MATERIAL - Method for producing a hydrogen storage material that includes a metal hydride and a non-hydrogenated material and that is doped with a metal as a catalyst, includes; mixing a catalyst precursor, which includes the metal, with the non-hydrogenated material so as to provide a first mixture; agitating the first mixture; thermally treating the first mixture so as to form a composite of the non-hydrogenated material and the metal; mixing the composite with the metal hydride so as to provide a second mixture; and grinding the second mixture so as to provide the hydrogen storage material. | 07-01-2010 |
20100166623 | DEVICE FOR THE THERMAL DEHALOGENATION OF HALOGEN-CONTAINING SUBSTANCES - A device for thermal dehalogenation of halogen-containing substances. The device includes a temperable reaction volume. The temperable reaction volume includes a top vapor space, a bottom sump region, a first inlet for a halogen-containing substance, a second inlet for a polyolefin, a first outlet for dehalogenated substances and halogen-containing reaction products, and a second outlet for the polyolefin. The second inlet includes a heater configured to heat the polyolefin to above a softening point thereof. The second inlet discharges into the top vapor space and includes at least one nozzle. | 07-01-2010 |
20100163395 | METHOD FOR THE RAPID PYROLYSIS OF LIGNOCELLULOSE - Method for fast pyrolysis of lignocellulose including: mechanically comminuting the lignocellulose to lignocellulose particles; at least one of completely drying and preheating the lignocellulose particles; mixing the lignocellulose particles with heat transfer particles so as to provide a mixture; heating the heat transfer particles, prior to the mixing, to a temperature between 500° C. and 650° C.; and heating, in a pyrolysis reactor with oxygen excluded, the lignocellulose particles using the heat transfer particles so as to establish a temperature between 400° C. and 600° C. for 1 to 50 seconds and so as to react the lignocellulose particles so as to provide pyrolysis coke, pyrolysis condensate, and pyrolysis gas. | 07-01-2010 |
20100132788 | PYROGENIC ZINC OXIDE-COMPRISING COMPOSITE OF LAYERS AND FIELD-EFFECT TRANSISTOR COMPRISING THIS COMPOSITE - Composite of layers which comprises a dielectric layer and a layer which comprises pyrogenic zinc oxide and is bonded to the dielectric layer. Process for producing the composite of layers, in which the pyrogenic zinc oxide is applied to the dielectric layer in the form of a dispersion in which the zinc oxide particles are present with a mean aggregate diameter of less than 200 nm, and the zinc oxide layer is dried and then treated at temperatures of less than 200° C. Process for producing the composite of layers, in which the pyrogenic zinc oxide is applied to a substrate layer or a composite of substrate layers in the form of a dispersion in which the zinc oxide particles are present with a mean aggregate diameter of less than 200 nm to form a zinc oxide layer, and then the zinc oxide layer and the substrate layer are treated at temperatures of less than 200° C., and then a dielectric layer is applied to the zinc oxide layer. Field-effect transistor which has the composite of layers. | 06-03-2010 |
20100132153 | CLEANABLE FILTER SYSTEM - A cleanable filter system includes a filter housing having an inlet for dust-laden gas and an outer annular gap volume disposed about an inner volume. The inner volume and the outer annular gap volume extend axisymmetrically about a bisecting line and are separated from one another by at least one gas-permeable wall. A submicron particulate filter is disposed in the inner volume. A discharge pipe is sealingly disposed in the inner volume axisymmetrically about the bisecting line. The discharge pipe includes a peripheral cylindrical surface that is gas-permeable and covered by the submicron particulate filter. A purge-gas conduit is disposed in the discharge pipe and configured to be rotationally driven about the bisecting line. The purge-gas conduit includes at least one radially outwardly directed nozzle disposed in a region of the submicron particulate filter. | 06-03-2010 |
20100126965 | MOLDED BODY, METHOD FOR PRODUCING THE BODY AND USE THEREOF - A method for producing a molded body, said method comprising: providing a film comprising a thermoplastic plastic and having a film thickness D ranging from 1 μm to 1000 μm; irradiating the film with ionizing radiation, to produce irradiated regions in the film; thermally reshaping the film into a molded body and generating at least one hollow structure, wherein a temperature of the thermal reshaping remains below the melting temperature for the thermoplastic plastic; removing the irradiated regions, to create pores having a diameter δ from about 10 nm to about 10 μm in the molded body; and removing the molded body from a mold. | 05-27-2010 |
20100107907 | DIE FOR MICRO CONTACT PRINTING AND METHOD FOR THE PRODUCTION THEREOF - A die for the micro contact printing includes a die body and a die surface that is fixedly connected to the die body. The die surface is divided into at least two different regions. Each of the at least two regions comprises a different material having a different absorption capacity for printing ink. At least one of the at least two regions has a lateral dimension of no more than 1000 nanometers. | 05-06-2010 |
20100083737 | DEVICE FOR MEASURING SUPERFINE PARTICLE MASSES - A device for measuring superfine particle masses including a quartz oscillator and an exposure system having at least two measuring chambers. Each of the at least two measuring chambers has a same geometry, a deposition surface for particles, and an aerosol feed directed at the respective disposition surface configured to feed an aerosol onto the respective deposition surface. At least one of the respective deposition surfaces is disposed on the quartz oscillator. | 04-08-2010 |
20100062509 | HIGHLY POROUS MAGNETIC TEMPORARY FIXED BED - The present invention relates to a fixed bed, for example for the isolation and/or purification of components originating from a biological system, which fixed bed comprises magnetic beads and a magnetizable fabric arranged at least in part in the fixed bed, a fluidized bed-fixed bed, which comprises the fixed bed of the invention after application of an alternating magnetic field, and also to a process for the isolation and/or purification of components originating from a biological system. | 03-11-2010 |
20100059345 | BALL SWITCH IN A MULTIBALL SWITCH ARRANGEMENT - A ball switch for a multi ball-switch arrangement includes a base plate and a metallic circular disk centrally disposed on the base plate. A first electrically-conductive contact track, which is co-planar with the circular disk, extends from the circular disk to a first edge of the base plate. A chamber plate having a through-bore is disposed opposite the base plate so as to form a chamber which concentrically circumscribes the circular disk. The chamber has a metallic inner wall with a circumferential first metallic annular strip disposed at a first end thereof at a first side of the chamber plate. A dielectric sealing ring which concentrically surrounds the circular disk is disposed between the first metallic annular strip and the base plate so as to seal the chamber. An electrically conductive ball is disposed in the chamber and has a diameter which prevents a further similar conductive ball from fitting into the chamber. | 03-11-2010 |
20100055776 | BIOREACTOR, ARRANGEMENT OF BIOREACTORS, PROCESS FOR PRODUCTION THEREOF AND USE THEREOF - The invention relates to a bioreactor including a housing having a lower housing half and an upper housing half that are respectively connected to one another on one side by a film joint. At least one of the upper or lower housing halves includes a device to exchange fluids. The bioreactor further includes at least one support element to support at least one cell culture substrate. The invention furthermore relates to an arrangement of such bioreactors, processes for production thereof and use thereof for culturing cells or as an implant. | 03-04-2010 |
20100045410 | PLANAR-HELICAL UNDULATOR - A planar-helical undulator for emitting 360° electrically variable photo radiation, including a first coil and a second coil disposed relative to an undulator axis, an axis of the first coil and an axis of the second coil and the undulator axis being parallel to each other, and the undulator axis forming a portion of a synchrotron beam axis. Further, each of the first and second coils includes a helical section and a planar section. The windings of each respective section are connected in series, so that the planar section generates, when energized, a first magnetic field, and so that the helical section generates, when energized, a second magnetic field. Each planar section is disposed around the corresponding helical section, and at least one of the helical section and the planar section of at least one of the coils includes variable windings changing symmetrically over a length of the respective section towards a middle of the respective section. | 02-25-2010 |
20100040324 | OPTICAL ELEMENT AND METHOD FOR ITS MANUFACTURE - An optical element includes a substrate having a passive waveguide and a laser waveguide disposed therein. The laser waveguide is in direct contact with the passive waveguide over a surface of contact so as to provide a butt coupling between the passive waveguide and the laser waveguide. A step extends between an upper edge of the passive waveguide and an upper edge of the laser waveguide. A covering is disposed on the passive waveguide so that the covering and the substrate together provide a cladding of lower refractive index around the passive waveguide and so that a hollow space is disposed between a lower edge of the covering and the upper edge of the laser waveguide. | 02-18-2010 |
20090317853 | METHOD FOR PRODUCING A LAYER ON A MOLDED ARTICLE AND USE THEREOF - A method for producing a layer on a molded article. The method includes providing a formable film. Galvanically catalytically active nuclei are anchored to at least one region of the formable film provided for the layer. The formable film is shaped so as to form the molded article. A galvanic deposition is performed on a surface of the molded article so as to bond the nuclei to form the layer. | 12-24-2009 |
20090308726 | PROCESS AND DEVICE FOR CONVERTING BIOMASS TO GASEOUS PRODUCTS - A device for converting biomass with a water content of at least 50% to gaseous products includes a reactor filled at least partially with a packing including at least one filler body for accommodating supercritical water and a hydrothermal molten salt. A heater is arranged to heat up the reactor and its content. A first feeding pipe is coupled to the reactor to feed water and salt solution into the reactor. A second feeding pipe is coupled to the reactor to feed to biomass into the reactor. A discharge pipe is coupled to the reactor to discharge gaseous products from the reactor. An outlet is proved in the bottom of the reactor for removing portions of the molten salt. | 12-17-2009 |
20090301881 | METHOD FOR PRODUCING CERAMIC COMPONENTS - A method for producing ceramic components, includes providing a dispersing agent comprising at least one first and one second powder fraction of an oxide ceramic, and a third powder fraction of an inter-metallic compound mixed in a liquid. The first powder fraction comprises a nanoscale particle fraction with particle sizes ranging from about 2 nm to 200 nm and functions as a binder. The second powder fraction comprises a sintering additive. The share of the third powder fraction, relative to the sum of all powder fractions, has a volume share of between about 50% and about 95%. The method further includes forming a green body with aid of precipitation by electrophoresis from the mixture, the precipitation by electrophoresis of the powder fractions occurring simultaneously. The green body is then sintered in an oxidizing atmosphere to form a ceramic component. | 12-10-2009 |
20090301364 | Method for improving the slag quality of grate firing systems - A method for improving a slag quality of slag in, a grate firing system. The method includes providing slag in a grate firing system including a combustion chamber disposed above a combustion bed. The combustion bed has a plurality of fixed-bed burnout zones in series on a combustion grate. The fixed-bed burnout zones include a first series of fixed-bed burnout zones and a second fixed bed burn-out zone disposed downstream of the first series. The first series of fixed-bed burnout zones is traversed with a flow of oxygen-containing gas. A portion of the combustion bed associated with the second fixed bed burn-out zone is traversed with a flow of a hot combustion gas from the combustion chamber. | 12-10-2009 |
20090263595 | METHOD FOR PRODUCING AN ELEMENT, INCLUDING A MULTIPLICITY OF NANOCYLINDERS ON A SUBSTRATE, AND USE THEREOF - A method for producing an element including a substrate having a plurality of nanocylinders deposited thereon includes providing the substrate. The substrate is covered with a nanoporous Al | 10-22-2009 |
20090232864 | METHOD FOR APPLYING A BIOACTIVE, TISSUE-COMPATIBLE LAYER ONTO SHAPED ARTICLES AND THE USE OF SUCH SHAPED ARTICLES - A method for applying a bioactive, tissue-compatible layer onto a shaped article includes providing, as a target material, a bioactive glass ceramic having a S53P4 composition, cleaning a shaped article and activating a surface of the shaped article with ions. The Shaped article is exposed to a bioactive glass ceramic beam pulse ablated by a pulsed electron-beam ablation of the bioactive glass ceramic target material so as to deposit a bioactive glass ceramic layer having a thickness ranging from 1 μm to 10 μm on the surface of the shaped article. A respective pulse frequency of the at least one of: 1) an electron pulse of the pulse electron beam abalation, and 2) the bioactive glass ceramic beam pulse, is controlled. Prior to an implantation, so as to avoid an initial cytotoxicity, at least one of the following is performed: a) an exposure of the article at least the times to | 09-17-2009 |
20090208395 | PROCESS AND APPARATUS FOR REDUCING NITROGEN OXIDES AND HALOGENATED ORGANIC COMPOUNDS IN INCINERATION PLANTS - A process for reducing nitrogen oxides and halogenated organic compounds in an incineration plant having at least one combustion chamber. The process comprises separating out fly ash using a dust collector. Water is added to and hydrochloric acid separated out in a first acid-operated scrubber. Water and ammonia are added so as to separate out sulphur dioxide in a second neutral or slightly acid-operated scrubber so as to form ammonium sulphite, a portion of the ammonium sulphite thereby reacts with oxygen so as to form an aqueous ammonium sulphate/ammonium sulphite solution. The aqueous ammonium sulphate/ammonium sulphite solution is introduced into an oxygen-containing smoke gas downstream of a secondary gas introduction area so as to decompose the ammonium sulphate and ammonium sulphite so as to form ammonia and sulphur dioxide. Ammonia, oxygen and nitrogen oxides are reduced in the smoke gas by selective non-catalytic reduction so as to produce nitrogen and water, the chloride-containing fly ash in the smoke gas reacting with sulphur dioxide, water and oxygen so as to produce sulphates and hydrochloric acid. | 08-20-2009 |
20090190799 | METHOD FOR CHARACTERIZING THE EXHAUST GAS BURN-OFF QUALITY IN COMBUSTION SYSTEMS - A method for characterizing a flue gas burnout quality of a combustion process in a combustion system having a gas burnout zone includes optically detecting in a visible wavelength range, in a flow cross section of the gas burnout zone, low-soot combustion regions, regions without combustion, and sooting regions, so as to provide a plurality of successive individual images, the regions without combustion and the sooting regions having different dynamics. The plurality of successive individual images are analyzed so as to distinguish regions of transition, to the low-soot combustion regions, of the regions without combustion and the sooting regions. | 07-30-2009 |
20090128445 | Apparatus For Attenuating Reflections Of Electromagnetic Waves, Method For Its Manufacture And Its Use - A device for attenuating reflections of an electromagnetic wave impinging thereon and a method of making the device. The device includes a structured film comprised of at least one of a ferromagnetic and ferrimagnetic material. The structured film has a structure and a uniform film portion of the at least one of a ferromagnetic and ferrimagnetic material underneath the structure such that the structured film has at least two different resonance frequencies. | 05-21-2009 |
20090039547 | METHOD FOR PRODUCING AN OBJECT INCLUDING AT LEAST ONE AUTONOMOUS MOVING PART AND ONE FIXING PART - A method for producing an object including at least one autonomous part movably disposed relative to an affixing part includes: providing a mold having at least one cavity configured to produce the at least one autonomous part; filling the at least one cavity with a curable or solidifying molding compound that includes a pulverulent sintering material and a binder; allowing the molding compound to solidify so as to form the at least one autonomous part; removing the at least one autonomous part from the cavity; disposing the at least one autonomous part in or on the affixing part so as to form a preform; and heat treating the preform so as to form the object. | 02-12-2009 |
20090035604 | CLADDING TUBES MADE OF FERRITIC/MARTENSITIC OR AUSTENITIC STEEL FOR NUCLEAR FUEL ELEMENTS/FUELS AND METHOD FOR SUBSEQUENTLY TREATING A FECRA PROTECTIVE LAYER THEREON THAT IS SUITED FOR HIGH TEMPERATURES - A cladding tube configured for use with nuclear fuels or nuclear feel elements and configured for contact with molten lead or molten lead alloys at up to 800° C. The cladding tube includes a tube including at least one of ferritic/martenisitic steel and austenitic steel. An alloy layer of up to 50 μm thickness is disposed on a surface of the tube and operable for corrosion resistance. The alloy layer includes 0-25% chromium, 3-15% aluminum and 60-97% iron. A method of making the cladding tube includes the use of a pulsed electron beam to melt the alloy layer on the tube. | 02-05-2009 |
20090020048 | METHOD FOR REDUCING NITROGEN OXIDE ON THE PRIMARY SIDE IN A TWO-STAGE COMBUSTION PROCESS - Method of reducing the nitrogen oxide formation (NO | 01-22-2009 |
20090008255 | Arrangement for Generating Liquid Flows and/or Particle Flows, Method for Producing and Operating Said Arrangement and Use of the Latter - A device for producing at least one of fluid flows and particles flows includes a substrate having a substrate surface. The substrate surface includes a matrix including a plurality of regions having at least one of a different magnitude of a surface charge, a different sign of the surface charge, and a different height above the substrate. A fluid including at least partially electrically charged particles is disposed at the substrate surface. A first control element is configured to supply a plurality of electrical voltages to a plurality of electrode pairs. The electric field exerts a first force on a component of the fluid within an electrical double layer. The component is disposed adjacent to the substrate surface. The electric field exerts a second force within the double layer and outside the double layer, the second force is exerted on the at least partially electrically charged particles. | 01-08-2009 |
20080302241 | Structural Principle of an Exhaust Gas Purification Installation, and Associated Method For Purifying an Exhaust Gas - In an exhaust gas cleaning system, a built-in cleaning section is embodied as an upright U, in which a first leg includes an ionizing zone to ionize particles or aerosols carried in the gas. The gas flows from above into the first leg and downward in a direction of gravity through the ionizing zone. A second leg includes a collector to separate the particles or aerosols from the gas flow, which flows into and through the collector in a direction from below and upward, counter to the direction of gravity. A spraying device is mounted above the collector to rinse the collector. A transition from the first to the second leg includes a connecting zone including a container to collect the particles or aerosols separated of the gas, which container includes a discharge pipe disposed at a lowest point of the container to discharge the liquid enriched with the particles. | 12-11-2008 |
20080283639 | Method for Operating a Fragmentation System and System Therefor - The invention relates to a method for operating an electrodynamic fragmentation system. The fragmentation product arranged in the process fluid is permanently suspended and forms a suspension with the process fluid. The portion of the processed fragmentation product which attains the target particle size or smaller is discharged from the reaction vessel and the fragmentation product exceeding the target particle size is supplied to the reaction area. The fragmentation system comprises a chargeable electric energy store, a pair of electrodes connected thereto, and both ends thereof are arranged at a distance from each other in the process fluid contained in the reaction vessel. The fragmented product is separated in a solid and liquid manner in a separator in the electrode intermediate chamber until it reaches the target particle size and is smaller than the target particle size and the prepared process fluid is guided back into the reaction vessel. | 11-20-2008 |
20080279995 | Process for the More Effective and Gentle Release of Quality-Enhancing Constituents From Grapes, the Young Wine Obtained in the Process and the Wine Produced Therefrom, as Well as a Device for Carrying Out the Electroporation - An improved and more gentle process for extracting useful substances from wine grapes is achieved by electroporation of the must produced from red and/or white grapes. The must is pumped or circulated before the pressing applied for must production through an installation or part of an installation and pulsed electric fields are applied therein to irreversibly rupture the biological cell walls of the grape skins. The device for carrying out must electroporation comprises a dielectric pipe, the flow duct for the must, in whose wall are arranged two mutually spaced electrodes to form a pulsed electric field between the electrodes. The must, which forms the electrolytic load of the device, has an electric resistance at least as high as the impedance of a high-voltage pulse generator connected to the device. | 11-13-2008 |
20080276525 | Method for the Solution Crystallization of Mixtures of Substances - A method for solution crystallization of mixtures of substances includes: providing a liquid mixture of substances including at least one component substance having an elevated melting point; drawing off a substream from the mixture of substances; feeding the substream to a heat exchanger so that the substream flows through the heat exchanger; cooling the substream in the heat exchanger to a temperature below a crystallization temperature of only the at least one component substance so that crystals from the at least one component substance form in the substream at an outlet of the heat exchanger; blending the substream including the crystals into the mixture of substances so that the crystals in the mixture of substances selectively bind other substances as a result of crystal growth; and providing for sedimentation and precipitation of the crystals in the mixture of substances. | 11-13-2008 |
20080241502 | Molded Body, Method For Producing the Body and Use Thereof - A molded body comprises a film with a film thickness D ranging from 1 μm to 1000 μm, with at least one hollow structure configured into the film. Each hollow structure has an outside diameter d equal to at least double value of film thickness D, a height h is equal to or less than double the value of the outside diameter d, a wall thickness b greater than 0.02 times the film thickness D and less than or equal to the film thickness D and a local curvature radius r greater than 0.2 times and less than or equal to 5 times the wall thickness b. The film and the hollow structure include a plurality of pores. | 10-02-2008 |
20080236043 | Method for Producing and Preparing Fast Pyrolysis Products from Biomass for an Entrained-Flow Pressure Gasification - A method is provided for producing and preparing fast pyrolysis products from a biomass for entrained-flow pressure gasification that includes: heating of the biomass under exclusion of oxygen in a pyrolysis reactor, a temperature of between 400 to 600° C. being established for one to 50 seconds, such that the biomass reacts to form porous pyrolysis coke, pyrolysis condensate and pyrolysis gas; and drawing off the pyrolysis gas; condensing vaporous constituents of the pyrolysis condensate in a plurality of condensation stages so as to: condense, in a first condensation stage, at temperatures above the dew point of water, a low-temperature carbonization tar from the vaporous constituents; and condense and separate at temperatures between 0° C. and the dew point of water, in at least one subsequent condensation stage, an aqueous solution of oxygen-containing organic compounds. | 10-02-2008 |
20080215257 | Method for Reducing Digital Data in an Emat Pig - The invention relates to a method for reducing digital data which can be obtained with an electromagnetic acoustic transducer (EMAT) pig. Said method increases the fidelity of reproduction compared to traditional methods, without increasing and/or without significantly increasing the amount of data which is to be memorised. Said method enables, after the testing step, the ultrasonic envelopes to be reconstructed without a significant loss of information, from the data which is recorded in a reduced manner. Said method evaluates the size of the enveloping by method groups in order to determine the size. The size determination is discriminated in the quality thereof by the method groups in order to determine the signal base. | 09-04-2008 |
20080210771 | Two-Substance Atomizing Device - A two-substance atomizing device for atomizing a fluid in a gas stream includes: a fluid supply branch including a nozzle orifice; a gas supply branch configured concentrically about the fluid supply branch; a concentric second gas branch branching from the gas supply branch and disposed upstream of the nozzle orifice, the nozzle orifice terminating in the gas supply branch; an axially symmetric mixing channel disposed in axial extension of the fluid supply branch and including a discharge orifice; an annular injection orifice in communication with the gas supply branch and disposed near the discharge orifice; and an adjustment device configured to adjust a cross section of the injection orifice. | 09-04-2008 |
20080196590 | Wet Electrostatic Ionising Step in an Electrostatic Deposition Device - A wet electrostatic ionization stage in an electrostatic separation device for purifying a flowing aerosal including finely dispersed particles entrained in a gas. The wet electrostatic ionization stage includes a plate disposed across a cross section of a flow channel and connected to a ground potential or reference counterpotential. The plate includes substantially identical openings through which the gas flows. The wet electrostatic ionization stage also includes a high-voltage grid disposed across the cross section of the flow channel either upstream or downstream from the plate and electrically isolated from a wall of the flow channel. The high voltage grid is coupled to a high voltage potential via a bushing disposed in the wall of the flow channel. For each opening in the plate, a rod-shaped high-voltage electrode coupled at one end to the high-voltage grid has a free end projecting centrically into the one opening. Each electrode includes a disk of electrically conductive material disposed on its free end. The disks are disposed in a substantially identical manner, each parallel to the plate, centrically with its corresponding opening and free from contact with the plate. The disks each include at least two outwardly extending radial tips. A sleeve is disposed in each opening. Each of the sleeves has a substantially identical cross section and an axis disposed substantially perpendicular to the plate. The sleeves are spaced circumferentially at a constant distance L from the radial tips. | 08-21-2008 |