Sliding Motion Between Material And Mold Surface (extruding Finite Articles) Patents (Class 264/323)
  • Patent number: 10145474
    Abstract: In order to provide a sealing arrangement for sealing between a first medium chamber filled with a first medium and a second medium chamber filled with a second medium, in the region of a component which is movable along the longitudinal axis, which can be easily manufactured and has low leakage, it is proposed that the sealing arrangement comprises a sealing element which comprises at least one dynamic sealing portion which is placed or placeable on the movable component, wherein the at least one dynamic sealing portion comprises at least two sealing lips between which a leakage reservoir is formed, wherein the leakage reservoir is partially delimited by two boundary surfaces of the sealing lips arranged facing one another, wherein the leakage reservoir is formed at least partially by a concave recess in at least one or between the at least two boundary surfaces of the sealing lips.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: December 4, 2018
    Assignee: ElringKlinger AG
    Inventors: Walter Schuhmacher, Klaus Hocker
  • Patent number: 9017590
    Abstract: Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a combination of high tensile strength and high oxidative stability. The materials are especially suitable for use as bearing components in artificial hip and other implants. Treated bulk materials are anisotropic, with enhanced strength oriented along the axial direction. The material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted crosslinked UHMWPE.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: April 28, 2015
    Assignee: Biomet Manufacturing, LLC
    Inventors: David W. Schroeder, Jordan H. Freedman, James E. Gunter, Brian D. Salyer, H. Gene Hawkins
  • Publication number: 20150061187
    Abstract: A method for producing a reinforcement member of composite material. The method includes producing a planar preform by stacking sheets of pre-impregnated fibers, heating the preform, and deforming the preform on a mold surmounted by an upper die whose shape confirms to a central portion of the reinforcement member to be obtained. The reinforcement member wings are in contact with the mold at two opposite lateral sides of the upper die after deformation. The deformed preform is also baked. Prior to deformation of the preform, a coating is applied promoting a sliding between the preform and the mold during the deformation. The coating comprises two tear-off strips superimposed on each other. A first tear-off strip is in the form of a pre-impregnated material in contact with the preform and a second tear-off strip is in the form of a dry material superimposed on the first tear-off strip.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 5, 2015
    Inventor: Pierre Estragnat
  • Patent number: 8940216
    Abstract: A device and method of producing a building panel with a compressed and curved edge including a press tool, a heat device and a lubricating device and a building panel with a curved edge produced by the device and method.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: January 27, 2015
    Assignee: Valinge Innovation AB
    Inventors: Jan Jacobsson, Peter Wingardh
  • Publication number: 20150008621
    Abstract: The objective of the present invention is to provide a method of forming a pressed paper piece by deep drawing a sheet of blank that is primarily made of paper in use of a punch and a die, and a production apparatus for implementing the method, whereby no distinguishable wrinkles are formed in upright portions of the pressed paper piece. The method of producing a pressed paper piece according to the present invention, implemented when deep drawing a sheet-like blank that is primarily made of paper in use of a punch and a die, includes maintaining a predetermined gap between a first blank holder and the die in an outer peripheral region of a process portion of the blank and applying a pressure to a radially inner region thereof via a second blank holder, thereby reducing wrinkling by an effect of integrated functions exerted in both regions of the blank.
    Type: Application
    Filed: January 10, 2013
    Publication date: January 8, 2015
    Applicants: TOYO SEIKAN GROUP HOLDINGS, LTD., TOKAN KOGYO CO., LTD.
    Inventors: Kenichi Takao, Ichiro Kunihiro, Masahiro Ogawa, Seiji Okabe
  • Patent number: 8871130
    Abstract: Draw a polymer composition by providing a polymer composition containing an orientable polymer having a softening temperature and a filler; conditioning the temperature of the polymer composition at or below its softening temperature; and drawing the polymer composition at a draw rate of at least 127 centimeters per minute in order to achieve an oriented filled polymer composition demonstrating a stable extent of cavitation with draw rate.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: October 28, 2014
    Assignee: Eovations, LLC
    Inventors: Kevin L. Nichols, Brett M. Birchmeier
  • Patent number: 8691136
    Abstract: A device is formed by the process into a bone screw or fastener, wherein the head has a degree of polymer alignment and strength, and wherein the shank has a higher degree of polymer alignment and strength. In practice of the present invention, the polymer slug is pressed into the die cavity by the actuation of ram press, causing the slug to conform to the die cavity. Through this process, the polymer molecular orientation is aligned to different degrees, in different zones of the device.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: April 8, 2014
    Assignee: Kensey Nash Corporation
    Inventors: Joseph DeMeo, Patrick E. Heam, Robert L. McDade
  • Patent number: 8475700
    Abstract: Prepare an oriented polymer composition that is cavitated, has cross sectional dimensions all at least three millimeters and at least one de-oriented surface layer having a thickness of at least 80 microns and at least 50 microns less than half the thickness of the oriented polymer composition, the de-oriented surface layer having a lower degree of polymer orientation than a 100 micron thick portion of the oriented polymer composition adjacent to and below the de-oriented surface layer by sufficiently heat treating a surface of a cavitated oriented polymer composition.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: July 2, 2013
    Assignee: Eovations, LLC
    Inventors: James J. O'Brien, Timothy O. Kirch, Kevin L. Nichols, Brett M. Birchmeier
  • Patent number: 8383134
    Abstract: The present application relates to a biodegradable material comprising opened starch or a mixture of opened starch and destructurised starch. The biodegradable material comprises about 50 to about 100 wt. % of opened starch or of a mixture of opened starch and destructurized starch, based on the total weight of the biodegradable material, said biodegradable material having a bulk density of 1.0 to 1.5 kg/dm. The biodegradable material is used for manufacturing biodegradable shaped articles, wherein said biodegradable shaped articles are suitable for delivery of a biologically or pharmaceutically active component in or to a vertebrate, e.g. a mammal.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: February 26, 2013
    Assignee: Bioneedle Technologies Group B.V.
    Inventor: Gijsbertus Gerardus Petrus Van De Wijdeven
  • Patent number: 8226875
    Abstract: An extrusion device is described herein, including an inventive die and mandrel that enable the production, using a conventional ram extruder, of strong coherent extremely thin-walled tubes having a wall thickness in the range of about 0.020 mm and about 0.080 mm.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: July 24, 2012
    Assignee: C. R. Bard, Inc.
    Inventor: David L. Bogert
  • Patent number: 8211351
    Abstract: The method for producing resorbable or degradable polymeric medical devices by applying compressive forces on solid polymeric objects containing liquid or solid additives, is characterized in that: A) the additives are able to promote the slip-page of the polymeric objects through the forming device, facilitate transient chain mobility and promote chain orientation; B) said additives are present in an amount of 0.005 to 20% of the dry weight of said polymeric objects; C) the solubility parameters of said additives being selected in such a way that after absorbing by said polymeric objects the additives do not dissolve more than 0.01 to 1% of the total mass of said polymeric objects; D) said applying of compressive forces is performed minimally at a temperature of Tmin=Tg?50° C., Tg being the glass transition temperature of the polymer the said object is made of polymer; and E) said applying of compressive forces is performed maximally at a temperature Tmax=Tm?5° C.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: July 3, 2012
    Assignee: Synthes USA, LLC
    Inventor: Sylwester Gogolewski
  • Patent number: 8211347
    Abstract: A method for socket-forming an end of a thermoplastic material tube, according to which the end is firstly widened without forming the socket and is then stabilized; the widened and stabilized end being finally socket-formed.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: July 3, 2012
    Assignee: SICA S.p.A.
    Inventor: Giorgio Tabanelli
  • Patent number: 8087923
    Abstract: An extrusion device is described herein, including an inventive die and mandrel that enable the production, using a conventional ram extruder, of strong coherent extremely thin-walled tubes having a wall thickness in the range of about 0.020 mm and about 0.080 mm.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: January 3, 2012
    Assignee: C. R. Bard, Inc.
    Inventor: David L. Bogert
  • Patent number: 8043548
    Abstract: Composite material and plunger-cast pipe manufacturing method and system wherein the composite material includes waste, chemically unmodified PET material, one or more waste filler materials (e.g. rock crusher fines, lime sludge or waste coal combustion by-products), and fiber reinforcement (e.g. glass, metal, ceramic, carbon, organic, and polymer fibers) and wherein the PET material is melted and mixed in a container to disperse filler material and fiber reinforcement in the PET material. The resulting mixture can be formed into a tubular pipe shape using the plunger-cast manufacturing method and system wherein a plunger piston and inner collapsible mold are pushed into the melted composite material contained in an outer mold. When cooled and solidified in the mold, a composite material having a matrix comprising PET with filler material and fiber reinforcement distributed in the matrix is formed in the shape of a tubular body.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: October 25, 2011
    Assignee: Iowa State University Research Foundation, Inc.
    Inventor: David J. White
  • Publication number: 20110254384
    Abstract: Methods and apparatus for hydrodischarging and hydrocharging substrates and articles to produce enhanced ability to avoid attraction of contaminants or improved capability of removing contaminants from fluids are disclosed. In another form the method involves removal of electric charges or neutralization of charge on or within substrates. Also disclosed are methods of making using electret substrates and articles for removing particulates and mists from fluid streams.
    Type: Application
    Filed: June 21, 2011
    Publication date: October 20, 2011
    Inventor: William K. Leonard
  • Patent number: 7981349
    Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: July 19, 2011
    Assignee: Quadrant EPP AG
    Inventors: Joseph V. Gregg, Wesley Allen Kohler
  • Patent number: 7976753
    Abstract: A piece of corrugated pipe cut from a longer length of pipe is provided with a pipe coupling part by subjecting one or more of the corrugation crests on the pipe to heat and pressure. This reshapes the one or more corrugations to form a seal receiving recessed spigot on the piece of pipe.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: July 12, 2011
    Inventors: Manfred A. A. Lupke, Stefan A. Lupke
  • Patent number: 7914270
    Abstract: A method may include the steps of: (a) providing a tire mold; (b) providing an extruder operatively connected to a head with a die assembly; (c) inserting at least a first compound into the first extruder; (d) forming an extrudate from the die assembly; (e) applying the extrudate directly from the die assembly into the tire mold to form a tire tread component; and, (f) controlling movement of the tire mold to correspond to the extrudate delivery.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: March 29, 2011
    Assignee: The Goodyear Tire & Rubber Company, Inc.
    Inventor: Gary Robert Burg
  • Patent number: 7892460
    Abstract: A system and method for drawing a preform. A draw tower includes a mount configured to suspend a preform. The method includes securing the preform to a mount and enclosing the preform in an enclosure. The enclosure has an external surface and defines an orifice through which material drawn from the preform can exit the enclosure. The preform is heated through the external surface is heated to a temperature suitable for drawing the material from the preform. Material is drawn from the preform through the orifice and collected.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: February 22, 2011
    Assignee: Paradigm Optics
    Inventors: David J. Welker, Yordan Miladinov
  • Publication number: 20100314800
    Abstract: Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a combination of high tensile strength and high oxidative stability. The materials are especially suitable for use as bearing components in artificial hip and other implants. Treated bulk materials are anisotropic, with enhanced strength oriented along the axial direction. The material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted crosslinked UHMWPE.
    Type: Application
    Filed: August 3, 2010
    Publication date: December 16, 2010
    Applicant: Biomet Manufacturing Corporation
    Inventors: David W. Schroeder, Jordan H. Freedman, James E. Gunter, Brian D. Salyer, H. Gene Hawkins
  • Publication number: 20100264564
    Abstract: A method for socket-forming an end of a thermoplastic material tube, according to which the end is firstly widened without forming the socket and is then stabilised; the widened and stabilised end being finally socket-formed.
    Type: Application
    Filed: December 1, 2006
    Publication date: October 21, 2010
    Applicant: SICA S.p.A.
    Inventor: Giorgio Tabanelli
  • Publication number: 20100244321
    Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.
    Type: Application
    Filed: June 11, 2010
    Publication date: September 30, 2010
    Inventors: Joseph V. Gregg, Wesley Allen Kohler
  • Publication number: 20100201034
    Abstract: An apparatus for producing a molded product from a sheet-form raw material blank has first and second mold tools that each respectively include a respective inner core mold and a respective outer edge mold laterally adjacent thereto. Drive elements drive the outer edge molds relative to a machine frame, and drive the inner core molds relative to the outer edge molds. A molding process involves closing the outer edge molds to hold an edge rim of the material blank while allowing slippage thereof, and then closing the inner core molds to three-dimensionally deform and mold a central portion of the material blank while pulling required additional material by slippage through the outer edge molds. A separate slip frame is not used. The edge rim held by the outer edge molds remains as a permanent mounting rim or flange of the finished molded product. Edge waste is minimized.
    Type: Application
    Filed: April 16, 2010
    Publication date: August 12, 2010
    Applicant: R + S Technik GmbH
    Inventor: Gerhard Spengler
  • Patent number: 7758796
    Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: July 20, 2010
    Assignee: Quadrant EPP AG
    Inventors: Joseph V. Gregg, Wesley Allen Kohler
  • Patent number: 7758797
    Abstract: UHMWPE panels of large width may be prepared by a continuous ram extrusion process by employing a slit die which preferably narrows from both sides in a direction transverse to the machine direction, and/or which employs a plurality of transversely positioned cooling zones located on the top and the bottom of the die, proximate the exit thereof. The panel exits the die at a temperature lower than the crystalline melt temperature.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: July 20, 2010
    Assignee: Quadrant EPP AG
    Inventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
  • Patent number: 7736579
    Abstract: Wide panels of UHMWPE having exceptional flatness and surface quality are ram extruded through a slit die equipped with a plurality of individually adjustable cooling zones proximate the panel exit slit and transverse to the machine direction which cool the by a back pressure device and preferably a vertical movement restraint. The process is robust and can be run for long product campaigns.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: June 15, 2010
    Assignee: Quadrant EPP AG
    Inventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
  • Publication number: 20100133726
    Abstract: Composite material and plunger-cast pipe manufacturing method and system wherein the composite material includes waste, chemically unmodified PET material, one or more waste filler materials (e.g. rock crusher fines, lime sludge or waste coal combustion by-products), and fiber reinforcement (e.g. glass, metal, ceramic, carbon, organic, and polymer fibers) and wherein the PET material is melted and mixed in a container to disperse filler material and fiber reinforcement in the PET material. The resulting mixture can be formed into a tubular pipe shape using the plunger-cast manufacturing method and system wherein a plunger piston and inner collapsible mold are pushed into the melted composite material contained in an outer mold. When cooled and solidified in the mold, a composite material having a matrix comprising PET with filler material and fiber reinforcement distributed in the matrix is formed in the shape of a tubular body.
    Type: Application
    Filed: January 26, 2010
    Publication date: June 3, 2010
    Inventor: David J. White
  • Patent number: 7716808
    Abstract: Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces where the diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of attaching the diaphragm are provided for simplifying the manufacturing process and for obtaining a robust electro-dynamic loudspeaker.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: May 18, 2010
    Assignee: Harman International Industries, Incorporated
    Inventors: Steven W. Hutt, John F. Steere, David B. Garner, Louis A. Mango
  • Patent number: 7717946
    Abstract: An implantable plate for providing support to a bone of a subject when affixed thereto includes a polymeric body of a biocompatible polymer having a desired amount of polymer molecule orientation in a first direction so that the plate can be bent to conform with a contour of the bone of the subject. The polymeric body includes a top surface, a bottom surface, and at least one fastener portion. The fastener portion includes a recess and a fastener hold that is configured for receiving a fastener when affixed to the bone of the subject. A method of manufacturing the implantable plate includes: (1) injection molding a biocompatible polymeric composition into a polymeric body within an injection mold; (2) removing the polymeric body from the injection mold; and (3) forming at least one fastener hole within polymeric body.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: May 18, 2010
    Assignee: Degima GmbH
    Inventors: Randolf von Oepen, Alexander Tschakaloff
  • Patent number: 7687002
    Abstract: An inventive solid state drawing die has shaping walls that define a shaping channel and that, in the course of solid state drawing, direct polymer composition along a drawing path. Each cross section of the drawing path (and, hence, polymer composition in the drawing path) is non-circular, substantially proportional to one another, contains a centroid that lies on a substantially straight line parallel to the drawing direction and all cross sectional dimensions are 1.5 millimeters or more.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: March 30, 2010
    Assignee: Dow Global Technologies, Inc.
    Inventors: Kevin L. Nichols, Brett M. Birchmeier, Martin H. Tusim, Ian M. Ward, Philip D. Coates, Phil Caton-Rose, Glen P. Thompson
  • Patent number: 7685695
    Abstract: A method of producing a speaker which is manufactured by bonding a plurality of speaker components, including steps of humidifying a joint portion which bonds at least two speaker components among the plurality of speaker components; and bonding the speaker components by humidifying the joint portion and thereafter painting a moisture-curable adhesive on the joint portion, to thereby reduce a time for bonding the speaker components by easily and quickly drying regardless of materials of the speaker components.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: March 30, 2010
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventor: Kawori Kishi
  • Publication number: 20090174118
    Abstract: A nanoimprint system according to one embodiment of the present invention is a system for performing a pattern transfer onto an object to be molded by pressing a mold against the object to be molded using a head, characterized in that the head has a flat pressing surface during pressing the mold and is slid onto the mold while pressing the mold.
    Type: Application
    Filed: May 31, 2006
    Publication date: July 9, 2009
    Inventors: Ryutaro Maeda, Harutaka Mekaru, Hiroshi Goto
  • Patent number: 7462318
    Abstract: A radiation crosslinked (50 kGy), pressure-treated UHMWPE material has been developed by applying compressive force on a crosslinked polymer in a direction orthogonal to an axial direction. The deformed material is then cooled while held in a deformed state. The resulting material is anisotropic, with enhanced strength oriented along the axial direction. The directionally engineered material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted highly crosslinked UHMWPEs.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: December 9, 2008
    Assignee: Biomet Manufacturing Corp.
    Inventors: David W. Schroeder, Jordan H. Freedman, James E. Gunter, Brian D. Salyer, H. Gene Hawkins
  • Publication number: 20080272518
    Abstract: The invention is a method to make compression molded motor vehicle parts from a charge of composite material with resin and fibers, such as sheet molded compound. The parts have voids, such as holes and gaps, that form in the compression mold under heat and pressure and not in secondary processing steps. The resin in the charge is melts in a reservoir in the mold to form resinous material from the charge. A flow front of resinous material is allowed to flow into a flow path around a restriction corresponding to the shape of the void from the reservoir. The flow front carries sufficient reinforcing fibers into the flow path. At least part of a border for the void forms in the flow path. The configuration is allowed to at least partially set.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Applicant: International Truck Intellectual Property Company, LLC
    Inventors: Jerry L. Steiner, Floyd A. Etzler, Peter J. Voors, Jerry J. Connett, Steven A. Oliver
  • Patent number: 7378144
    Abstract: A device is formed by the process into a bone screw or fastener, wherein the head has a degree of polymer alignment and strength, and wherein the shank has a higher degree of polymer alignment and strength. In practice of the present invention, the polymer slug is pressed into the die cavity by the actuation of ram press, causing the slug to conform to the die cavity. Through this process, the polymer molecular orientation is aligned to different degrees, in different zones of the device.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: May 27, 2008
    Assignee: Kensey Nash Corporation
    Inventors: Joseph DeMeo, Patrick E. Hearn, Robert L. McDade
  • Publication number: 20080081855
    Abstract: A thermoplastic composition comprises a polycarbonate having repeating structural carbonate units of the formula (1): wherein at least 60 percent of the total number of R1 groups contain aromatic organic groups and the balance thereof are aliphatic, alicyclic, or aromatic groups; and wherein the polycarbonate comprises terminal groups derived from reaction with a cyanophenol of the formula wherein Y is a halogen, C1-3 alkyl group, C1-3 alkoxy group, C7-12 arylalkyl, C7-12 alkylaryl, or nitro group, y is 0 to 4, and c is 1 to 5, provided that y+c is 1 to 5; a branching agent; and a flame retardant. The compositions are useful in the manufacture of a wide variety of parts, particularly those having a thin wall.
    Type: Application
    Filed: April 17, 2007
    Publication date: April 3, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Brian D. Mullen
  • Patent number: 7344672
    Abstract: Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a combination of high tensile strength and high oxidative stability. The materials are especially suitable for use as bearing components in artificial hip and other implants. Treated bulk materials are anisotropic, with enhanced strength oriented along the axial direction. The material is oxidatively stable even after four weeks of accelerated aging in a pressure vessel containing five atmospheres of oxygen (ASTM F2003). Because of its oxidative stability, the deformation processed material is a suitable candidate for air-permeable packaging and gas sterilization, which has thus far been reserved for remelted crosslinked UHMWPE.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: March 18, 2008
    Assignee: Biomet Manufacturing Corp.
    Inventors: David W. Schroeder, Jordan H. Freedman, James E. Gunter, Brian D. Salyer, H. Gene Hawkins
  • Publication number: 20080036111
    Abstract: The present invention provides a thermally crosslinked polymeric material and a medical implant made from such polymeric material having significant crosslinking and substantially no detectable free radial for improved wear and oxidation resistance. A method is disclosed for forming a crosslinked oxidation-resistant polymeric material by placing the polymer material in a heating environment at a temperature above the melting point of the polymeric material for a sufficient time to create free radicals and form crosslinks within the polymer micro-structure followed by a cooling step to eliminate residual free radicals and form crosslinks within the polymer micro-structure. A method of making a crosslinked oxidation-resistant UHMWPE medical implant from a solid form of UHMWPE is also disclosed. Another method of making a crosslinked oxidation-resistant UHMWPE near-finished or finished medical implant by compression molding using UHMWPE resin powder as the starting material is also disclosed.
    Type: Application
    Filed: August 9, 2006
    Publication date: February 14, 2008
    Inventor: Dehchuan Sun
  • Publication number: 20080018022
    Abstract: UHMWPE panels of large width may be prepared by a continuous ram extrusion process by employing a slit die which preferably narrows from both sides in a direction transverse to the machine direction, and/or which employs a plurality of transversely positioned cooling zones located on the top and the bottom of the die, proximate the exit thereof. The panel exits the die at a temperature lower than the crystalline melt temperature.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 24, 2008
    Inventors: Joseph V. Gregg, Wesley Allen Kohler, Lyle D. Berning
  • Publication number: 20080018011
    Abstract: UHMWPE panels of large width may be ram extruded from a slit die in a stable process, by restraining a panel which exits the die below the crystalline melt temperature against movement away from the die by a back pressure device, so as to exert a back pressure between the back pressure device and the die, the back pressure device preferably constructed of a plurality of differentially adjustable elements so as to be able to compensate for changes in processing characteristics over time. Vertically restraining UHMWPE panels as they further cool also greatly improves product characteristics.
    Type: Application
    Filed: July 21, 2006
    Publication date: January 24, 2008
    Inventors: Joseph V. Gregg, Wesley Allen Kohler
  • Patent number: 7278200
    Abstract: Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different methods of tensioning the diaphragm are provided for simplifying the manufacturing process and for assuring proper diaphragm tension.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: October 9, 2007
    Assignee: Harman International Industries, Incorporated
    Inventors: John F. Steere, David B. Garner
  • Patent number: 7210213
    Abstract: A speaker collective substrate with component insertion hole sections and electrode sections has a plurality of speaker forming areas. An electrical speaker section, which comprises a magnetic circuit section and a vibration section, is inserted into each of the component insertion hole sections. Then, a collective lid, in which a plurality of lids have been formed for sealing the electrical speaker sections, is attached onto the speaker collective substrate. After that, the speaker collective substrate and the collective lid are divided into individual speaker forming areas along partition lines extending in the directions of the X and Y axes to form individual dynamic speakers. Thus, it is possible to mass-produce dynamic speakers with uniform quality through a collectively manufacturing process.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: May 1, 2007
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Kazumi Miyamoto, Naoki Miura
  • Patent number: 7152299
    Abstract: Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame. The diaphragm is driven by a motive force created when current passes through the conductor within the magnetic field. The electrical current is varied to create an acoustical output from the electro-dynamic loudspeaker. Different frame structures are provided for simplifying the manufacturing process and defining a reduced cost electro-dynamic loudspeaker.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: December 26, 2006
    Assignee: Harman International Industries, Incorporated
    Inventors: Louis A. Mango, John F. Steere, David B. Garner, Steven W. Hutt, Ronald E. Fenwick
  • Patent number: 6915555
    Abstract: A method of manufacturing a loudspeaker comprises: continuously forming diaphragm portions and alignment portions on a band resin film; positioning one of a frame and a protector at an upper die or lower die; aligning other alignment portions formed on the frame, the protector, or the upper or lower die having the film disposed thereon, with the alignment portion formed on the film; bonding the frame and the resin film that is to form the diaphragm; and cutting a diaphragm out of the resin film. A position of bonding the diaphragm to the frame or the protector can be easily determined by aligning the alignment portion formed on the band resin film with another alignment portion provided on the frame, the protector, or the lower or upper die on which the frame or protector is disposed. Further, a conventionally-indispensable ring can be eliminated to reduce a number of components.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: July 12, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kenichi Ajiki
  • Patent number: 6908582
    Abstract: A process for producing a biodegradable and bioabsorbable implant material, which comprises forging a billet comprising and biodegradable and bioabsorbable crystalline polymer at a low temperature and then forging the same once more or in a plurality of times at a low temperature by changing its press-forcing direction.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: June 21, 2005
    Assignee: Takiron Co., Ltd.
    Inventors: Yasuo Shikinami, Masaki Okuno, Hiroshi Morii
  • Patent number: 6890395
    Abstract: Medical devices having at least a component, such as a catheter balloon, stent cover and vascular graft, formed of ultrahigh molecular weight polyolefin, such as ultrahigh molecular weight polyethylene. The device component is formed from ultrahigh molecular weight polyethylene that has been processed so that it is microporous and has an oriented node and fibril structure. The device component expands compliantly at low strains and are substantially less compliant at higher strains. The invention also comprises methods for making such medical devices, including the steps of compacting a polyethylene powder and deforming it to impart the oriented structure.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: May 10, 2005
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: Murthy V. Simhambhatla
  • Patent number: 6761786
    Abstract: Medical devices such as catheter balloons, stent covers and vascular grafts formed of ultrahigh molecular weight polyethylene. The devices are formed from polyethylene that has been processed so that it is microporous and has an oriented node and fibril structure. The balloons expand compliantly at low strains and are substantially less compliant at higher strains. The invention also comprises methods for making such balloons, including the steps of compacting a polyethylene powder and deforming it to impart the oriented structure.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: July 13, 2004
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Murthy V. Simhambhatla, Robert D. Ainsworth, Robert P. Saltman
  • Publication number: 20030189268
    Abstract: A rustication for preparing reveal bands in a precast panel surface. The rustication is made from a one piece elongate body of extruded foam and comprises an upper surface, a lower surface and laterally-spaced sidewall surfaces that extend between the upper and lower surfaces. The lower surface defines a base plane. One or more downward-extending edges that project below the lower surface base plane are included such that they can bend under the application of a load, such as when concrete is poured around it to form the precast panel. Under such a load, the edge scrapes along the top of a panel-forming surface so that an enhanced sealing engagement between the panel-forming surface and the rustication is effected. The rustication can further include a plurality of longitudinally-spaced apertures that extend from the upper surface to the lower surface to facilitate the securing of the rustication to the panel-forming surface, thereby precluding rustication shift once the concrete is poured.
    Type: Application
    Filed: December 4, 2001
    Publication date: October 9, 2003
    Applicant: Fukuvi USA, Inc.
    Inventor: Kyozaburo Takagi
  • Publication number: 20030127765
    Abstract: A molding process and apparatus are disclosed herewith including extruding a polymer from at least one nozzle into a mold cavity, and displacing at least one of the nozzle and the mold cavity during the step of extruding to deposit at least a portion of a layer of polymer into the mold cavity, and subsequently enclosing the mold cavity with a mating mold section to produce a molded part.
    Type: Application
    Filed: August 15, 2002
    Publication date: July 10, 2003
    Inventors: Richard A. Weiland, Sing-Lit Jim, Roger Wang
  • Publication number: 20030107153
    Abstract: An assembly for manufacturing carriers (4) of information or decoration, characterised by a mould unit comprising two mould means which are joinable with each other. The mould unit comprises an injection moulding station (1) for injection moulding of said carriers (4), and a printing station (2) with a stamping unit (15) for applying to said carrier (4) a covering formed in accordance with the current information or decoration. The present invention also concerns a corresponding method.
    Type: Application
    Filed: December 27, 2002
    Publication date: June 12, 2003
    Inventors: Hans Brewitz, Lars Persson, Thomas Svensson