Patents Examined by J. Reed Batten, Jr.
  • Patent number: 5992501
    Abstract: An inversion casting vessel includes a melt-filled container with a hole in the floor through which a metal strip is drawn. As the strip is drawn through the container, crystallization of the melt on the metal strip occurs, thereby forming a metal strand. The hole in the floor is a slit shaped channel through which the strip is run in a low-contact manner. The container also includes a cooling device for cooling the melt in the area of the slit shaped channel. The cooling device maintains the temperature of the melt around the channel to create a two-phase field of the melt, one of the phases being crystal, making up 50%-90% of the two phase field. The metal strip first contacts the melt at the two-phase field of the melt as the strip is run through the melt container.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: November 30, 1999
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Tarek El Gammal, Peter Hamacher, Michael Vonderbank, Fritz-Peter Pleschiutschnigg, Ingo Von Hagen
  • Patent number: 5988259
    Abstract: Method and apparatus for controlling the cooling of a strand in a continuous casting installation, in which the cooling or, respectively, the solidification behavior of the strand ensures by means of the quantity of cooling agent used for cooling the strand, whereby the required quantity of cooling agent is determined, constantly and in real time, dependent on a predetermined target temperature distribution. A cooling model is used with which a temperature distribution in the strand can be calculated from a quantity of cooling agent.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: November 23, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Herbert Welker, Franz Hartleb, Otto Gramckow
  • Patent number: 5983984
    Abstract: Insulating sleeve mixes that contain hollow aluminosilicate microspheres, an organic binder, and boric acid and/or a phosphate, and their uses.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: November 16, 1999
    Assignee: Ashland Inc.
    Inventors: Ronald C. Auderheide, Helena Twardowska, Ralph E. Showman
  • Patent number: 5983982
    Abstract: The pattern material with substantially spherical filler particulates is used to produce investment cast components with improved surface quality, reduced finishing costs, and reduced core breakage. The pattern material comprises substantially spherical particles within the particle size range of about 10 microns to about 70 microns particle diameter, the use of which reduces the number of random, localized surface depressions and pits to improve pattern surface texture and uniformity. Patterns so formed inpart the same improvements to the surface of subsequent investment cast components. The resulting castings exhibit improved as-cast surface finish and reduced random, localized surface pitting, thereby reducing or eliminating expensive post casting surface finishing operations. Moreover, the spherical morphology of the filler particulates reduces injection pressures to fill a pattern die cavity as compared to non-spherical filler particulates.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: November 16, 1999
    Assignee: Howmet Research Corporation
    Inventors: Joseph M. Vihtelic, Alan J. Graham, Robert L. McCormick, Laura A. Carpenter
  • Patent number: 5983973
    Abstract: A mold vessel having a mold cavity is heated and evacuated. A charge of molten infiltrant is provided into the mold vessel from a source not in vacuum communication with the mold vessel while a reduced pressure is maintained in the mold cavity. Pressure is applied to the molten infiltrant to move it into the mold cavity. The molten infiltrant in the mold cavity is cooled to solidify the molten infiltrant. The mold cavity may contain a preform to produce a metal matrix composite.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: November 16, 1999
    Assignee: Massachusetts Institute of Technology
    Inventor: James A. Cornie
  • Patent number: 5983977
    Abstract: A sleeve (6) serving as both a molten metal receiver and a pressure cylinder for a die casting machine is formed out of a metal material having a thermal conductivity of not more than 20 W/mK. Concretely speaking, the sleeve (6) is formed out of an iron-based alloy containing at least 7-19 wt. % of Ni and having metallographic/structure comprising mainly a martensite phase or a mixed phase of a martensite phase and an austenite phase. The iron-based alloy contains at least one kind of metal selected from the group consisting of 3-8 wt. % of Si, 0.3-2 wt. % of C, and 0.03-0.1 wt. % of Mg and Ca, and not more than 1.0 wt. % of Mn, and this alloy is, for example, spherical graphite cast iron. Since the sleeve (6) is formed out of a metal material of such a low thermal conductivity, the mixing in of a solidification phase is minimized, and high reliability and durability can be obtained.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 16, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takanobu Nishimura, Masato Yada
  • Patent number: 5983983
    Abstract: A mould is provided having a surface which defines a mould cavity, and the mould surface includes on at a least part thereof a compound comprising a nucleation agent. The mould is heated. A metal heated to a temperature 0-15.degree. C. above the liquidus temperature is poured into the heated mould cavity and the molten metal is solidified in the mould cavity.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: November 16, 1999
    Assignee: Triplex Llyod Limited
    Inventor: Philip Neil Whateley
  • Patent number: 5979539
    Abstract: A block assembly is secured to a support beam and the block assembly is adjusted relative to the support beam. The block assembly is secured to the support beam by actuating at least some of a plurality of discrete fixing devices by application of a force to single point. The block assembly can be adjusted relative to the support beam in the z-direction, the x-direction and/or the y-direction.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: November 9, 1999
    Assignee: Golden Aluminum Company
    Inventors: Erich Luginbuhl, Marcel Witschi, Ernst Zurcher
  • Patent number: 5979538
    Abstract: A continuous chain caster has upper and lower mold assemblies comprising endless belts and chains traveling at synchronized speeds. The mold assemblies meet to form a mold channel which is filled with molten metal from a headbox and feed tip. As the molten metal passes through the mold channel, the metal solidifies into the shape of the mold channel. Each belt is positioned outside the corresponding chain so that the smooth surface of the belt defines the surface of the mold channel thereby preventing the formation of fins between mold blocks which make up the chain, protecting the chain blocks, and neutralizing deformations in the chain blocks. The upper and lower blocks of the chains have protrusions at opposite ends which engage the opposing blocks to form the sides of the mold channel. By sliding the chains relative to each other, the width of the mold channel is adjustable.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 9, 1999
    Assignees: Fata Hunter, Inc., Hunter Douglas Industries, B.V.
    Inventors: Curt Braun, Christopher A. Romanowski, Bobby Bruce Speed, Pieter F. Post
  • Patent number: 5975190
    Abstract: The continuous block caster includes a block assembly, a support beam and an apparatus for securing the block assembly to the support beam. The securing apparatus includes a plurality of discrete fixing devices actuated simultaneously by applying a force to a single point.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: November 2, 1999
    Assignee: Golden Aluminum Company
    Inventors: Erich Luginbuhl, Marcel Witschi, Ernst Zurcher
  • Patent number: 5971059
    Abstract: The upper level of the pouring conveyor receives sand molds and conveys the empty molds to a pouring station wherein molten material is deposited therein to form castings. Each mold is provided with a supportive weight and jacket before pouring. After the castings have been poured, the molds are transferred to the lower level of the pouring conveyor for cooling purposes, and then back to the upper level to remove the weight and jacket. The sand molds are then transferred to the upper level of the cooling conveyor and are deposited into trays provided on the cooling conveyor. Each tray is adapted to receive a plurality of molds to enable the molds to move from serial to parallel movement. An indexable pusher arm is provided to accurately place each mold in a respective tray to insure proper spacing for uniform cooling. After each tray has traversed the upper and lower levels of the cooling conveyor, the molds are removed from the trays and the sand is broken away to reveal the castings for harvest.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: October 26, 1999
    Assignee: Hunter Automated Machinery Corporation
    Inventors: William A. Hunter, William G. Hunter
  • Patent number: 5971056
    Abstract: A device for hardening a core mass containing sand contained within a foundry core forming tool includes a mixing device in communication with the foundry core forming tool for introducing a flow of a carrier gas stream enriched by catalyst vapor into the core mass containing sand; a first runnings system including a catalyst receiver tank containing catalyst, a first runnings pipe in communication with the catalyst receiver tank and the mixing device, a pump provided in the first runnings pipe for pumping catalyst from the catalyst receiver tank through the first runnings pipe, valve device provided in the first runnings pipe for dispensing catalyst into the mixing device, and a flow meter provided in the first running pipe between the pump and the valve device; a compressed air source in communication with the mixing device for providing a carrier gas stream comprised of air thereto; and programmed control device for controlling the valve device of the first runnings system and the compressed air source; wh
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: October 26, 1999
    Assignee: Luger GmbH
    Inventor: Wilhelm Bovens
  • Patent number: 5967222
    Abstract: In order to effectively remove and reclaim sand from a metal casting, an apparatus and system includes a bed having an entrance for receiving the casting and an exit for removing the casting. The bed is adapted to fluidize sand and may also be subjected to vibratory forces. The apparatus and system further includes a sand distribution conveyor for supplying sand to be fluidized to the bed at a point generally near the entrance and a sand transfer conveyor for removing sand to be recirculated from the bed at a point generally near the exit. The bed achieves a thorough mixing of the sand due to the fluidization and vibratory forces. With these features of construction, the apparatus and system also includes a sand return conveyor with all of the conveyors being vibratory and insulated to achieve energy efficient sand recirculation.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: October 19, 1999
    Assignee: General Kinematics Corporation
    Inventors: Albert Musschoot, Daniel T. Lease
  • Patent number: 5967221
    Abstract: In a conveyor or other foundry equipment having surfaces protected by a wear plate secured to a structural part of the equipment, the wear plate is detachably secured by means of studs permanently secured to a structural part of the equipment. Heads of the studs cooperate with engagement flanges in keyhole-like recesses in the wear plate, all in such a manner that the wear plate can be detached by sliding it in a direction to disengage the flanges from the heads. With this arrangement, the wear plate can be attached and detached without the use of tools other than possibly a soft mallet, and without the use of screws exposed at the wear face of the wear plate. The arrangement can also be used to detachably secure a wear plate to other structural parts of foundry equipment such as a moulding chamber or a clamp.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: October 19, 1999
    Assignee: Georg Fischer Disa A/S
    Inventor: Viggo Persson
  • Patent number: 5964277
    Abstract: A molten metal is poured in a molten metal storage portion (50) formed between a pair of cooling drums (1, 1') which rotate in opposite directions to each other and a thin metal plate (40) is discharged downward thereof. A casting operation is performed while shot particles (30) are being blasted by a shot particles blasting device (15) from at least two positions onto an entire widthwise outer circumferential surface (2) of each cooling drum (1, 1') so as to form dimples on the circumferential surface (2), thereby preventing the occurrence of cracks in the cast piece (40). Also, a brushing device (5) is disposed in abutting relation on the outer circumferential surface (2) of the cooling drum (1, 1') in order to clean the surface (2).
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: October 12, 1999
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kisaburo Tanaka, Keiichi Yamamoto, Youichi Wakiyama
  • Patent number: 5960856
    Abstract: A casting pool (30) of ferrous molten metal is supported on a pair of chilled generally horizontal casting rolls (22) forming a nip (27) between them. The casting rolls (22) rotate mutually opposite directions to produce a solidified metal strip (12) moving downwardly from the nip (27). The strip (12) passes along a transit path (10) which takes it away from the nip (27) in an unrestrained loop (29) disposed within a strip enclosure (38) within which the strip is confined through said transit path (10). The strip (12) moves downwardly from the nip (27) to form the unrestrained loop (29) passes between a pair of cooled non-contact heat absorbers (101) to which heat is radiated from the strip (12) whereby to extract from the strip heat generated by completion of solidification of metal therein after leaving the casting pool (30). Heat absorbers (101) are formed as opposite side walls of a cooling collar (100) defining an upper part of enclosure (38) and provided with cooling water ducts (102).
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: October 5, 1999
    Assignees: Ishikawajima-Harima Heavy Industries Company Limited, BHP Steel (JLA) Pty. Ltd.
    Inventors: Walter Blejde, Hisahiko Fukase, Rama Ballav Mahapatra
  • Patent number: 5960854
    Abstract: In a hot chamber die-casting machine, inductively-operating heating devices are associated with the mouthpiece area of the casting container and the nozzle. All of these heating devices are operated with medium frequency. The inductors are cooled with air. The machine is useful for hot chamber die-casting machines that process magnesium.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: October 5, 1999
    Assignee: Oskar Frech GmbH & Co.
    Inventors: Roland Fink, Ulrich Schraegle
  • Patent number: 5960855
    Abstract: The apparatus includes a pair of cooled, rotating casting rolls forming a nip between them. Molten metal is delivered into the nip between the casting rolls to form a casting pool of molten metal supported on the rolls. The cast strip produced is delivered downwardly from the nip and guided through a transit path which takes it away from the nip. An enclosure confirms the strip throughout the transit path and includes an enclosure wall including a movable section disposed beneath the casting rolls and formed to serve as a movable receptacle for scrap produced at any stage of the casting process, which enclosure is sealed to control ingress of oxygen containing atmosphere during operation of the apparatus, thereby controlling the formation of scale on the strip during operation of the apparatus.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: October 5, 1999
    Assignees: Ishikawajima-Harima Heavy Industries Company Limited, BHP Steel (JLA) Pty Ltd
    Inventors: Massoud Assefpour-Dezfully, Kenneth Michael Browne
  • Patent number: 5957190
    Abstract: In a method of integrally attaching a hollow member to a cast product by casting so that the hollow member communicates with a hollow interior of the cast product, a closure member is fitted into an open end of the hollow member so that the open end of the hollow member is closed by the closure member. The closure member projects from a core for forming the hollow interior of the cast product in a direction different from a direction in which the core is drawn out of the cast product. A molten metal is poured into a casting mold after the casting mold has been clamped. The closure member is moved inside the core after solidification of the molten metal so that the closure member is released from the fitting in the hollow member. The core is drawn out of the solidified metal subsequently to the moving step of the closure member.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: September 28, 1999
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hisaya Morishita, Akira Seki, Shigeki Tamura, Mitsuru Inui
  • Patent number: 5957189
    Abstract: A first quantity of all the molding sand necessary to produce a mold is fed in the mold space, the first quantity being one of at least two parts divided from the total molding sand. The mold space is evacuated and then air is introduced into the mold space at the air-pressure rising rate of 30--to 500 kg/cm.sup.2 /sec. Another quantity of the molding sand is fed into the mold space, the mold space is evacuated and then air is introduced into the mold space at the air-pressure rising rate of 30--to 500 kg/cm.sup.2 /sec. The apparatus includes a sand passage through which each quantity of sand is fed into the mold space, and a gate for closing the sand passage thereby closing the mold space to allow the mold space to be evacuated and then subjected to a pressure increase.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: September 28, 1999
    Assignee: Sintokogio, Ltd.
    Inventors: Nagato Uzaki, Masayoshi Kasazaki, Hisashi Harada, Kazuo Sugimoto