Patents Examined by K. Y. Lin
  • Patent number: 5626179
    Abstract: In the production of castings from a melt of a reactive metal selected from the group consisting of titanium, titanium alloys, and titanium-based alloys, a reusable casting mold (20) is used; the mold, at least in the area of the surface which comes in contact with the melt, consists of at least one metal selected from the group consisting of tantalum, niobium, zirconium, and/or their alloys. The casting mold (20) preferably consists, at least in the area of the surface which comes in contact with the melt, of a tantalum based alloy containing at least 50 wt. % of tantalum. The casting molds can be made of a homogeneous metal, but it is also possible to insert shells of the metals in question into a base body to form the boundaries of the mold cavities, whereas the base body itself consists of some other metal or alloy or of a nonmetal such as graphite or silicon nitride.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: May 6, 1997
    Assignee: Ald Vacuum Technologies GmbH
    Inventors: Alok Choudhury, Matthias Blum, Harald Scholz, Georg Jarczyk
  • Patent number: 4408651
    Abstract: A gooseneck assembly (10) for hot chamber die-casting comprises a shot cylinder (12), an injection duct (16) leading from the bottom of the cylinder to a die (18), and a reservoir (20) which communicates with the shot cylinder through openings (22, 23 and 24) in a partition wall (21). The upper ends of the shot cylinder and reservoir are closed and a protective atmosphere is maintained above a level (6A) of molten metal in the assembly. The assembly is automatically recharged with molten metal from a separate crucible (3) through a syphon pipe (30).
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: October 11, 1983
    Assignee: Promagco Limited
    Inventors: Dennis Smedley, Noel C. Spare
  • Patent number: 4379482
    Abstract: Production of boron-containing steel slabs free from surface defects by continuous casting, particularly prevention of the slab surface crackings by cooling the slab with a specific cooling rate through the temperature range from the melting point to 900.degree. C. so as to prevent boron-containing compounds such as BN from precipitating along the austenite grain boundary. Great advantage over the conventional art is that boron-containing molten steels which could not be continuously cast can be successfully continuously cast into slabs free from surface defects.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: April 12, 1983
    Assignee: Nippon Steel Corporation
    Inventors: Hiroo Suzuki, Koichi Yamamoto, Yasuhide Ohno, Kou Miyamura
  • Patent number: 4378835
    Abstract: A foundry core or mold machine utilizes a horizontally extending frame pivoted at one end which fixedly supports one box half or cope and movably supports the other box half or drag. A power actuator pivots the frame to clamp the box halves closed against a blow head or gassing head which may be shuttled thereabove. The drag box half is mounted on a cradle on the frame for movement toward and away from the cope or fixed box half and for pivoting movement to bring the box to a core or mold discharge or an inspection or disassembly position when the box halves are not clamped against the blow head or gassing head. Each box half includes a machine actuated stripping mechanism to insure removal of the core or mold both from the cope and drag with the latter then placing the core on a discharge conveyor. The conveyor may be of the flat belt type canted slightly to present a flat surface to receive the core or mold.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: April 5, 1983
    Assignee: The Osborn Manufacturing Corporation
    Inventor: Gilbert J. Janke
  • Patent number: 4378836
    Abstract: A foundry manipulation method and device for foundry castings or equipment and in particular for molten metal, constituted by a frame 1 supporting an arm 9 to one of the ends of which there is fitted a member 11 for supporting castings, equipment or metal. According to the invention, the frame 1 comprises a fixed part 2 and a mobile part 3 rotating relative to part 2 about a vertical shaft. The support member 11 is hinged to end of the arm 9, arm is hinged in the vicinity of its other end 9b to the top of mobile part 3 about a horizontal pin 12 in such a manner that the support member 11 passes to a position directly above vertical shaft 3 during the movement of the arm 9 about its hinge 12, means 19 being provided to maintain support member in a vertical position, whatever the inclination of the arm.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: April 5, 1983
    Inventor: Robert Moussault
  • Patent number: 4375234
    Abstract: A process and apparatus for casting a material into a desired thin strip shape. Molten material is formed into the thin strip shape by an electromagnetic containing and forming process. In a first portion the molten material is shaped into the desired thin strip shape and in a second portion upstream of and communicating with the first portion the molten material is electromagnetically contained in a sump. The sump at a top surface thereof has a substantially larger cross-sectional area as compared to a cross-sectional area of the thin strip shape.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: March 1, 1983
    Assignee: Olin Corporation
    Inventor: Michael J. Pryor
  • Patent number: 4375440
    Abstract: An apparatus is set forth for the continuous production of highly cooled metal splats. Melted metal is poured onto a spinning atomization disc means whereby liquid metal droplets leave the disc means in a horizontal plane. An annular cooling gas jet flowing normal to the particle plane around the disc deflects the heavier liquid droplets to a conical splat plate which is fixed to rotate with said disc, where the droplets splat and cool, and are ejected by centrifugal force. An annular space is located between said conical splat plate and said rotary atomization means for permitting the gas and other solidified particles to pass downwardly to a shield which directs the particles to a collection area.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: March 1, 1983
    Assignee: United Technologies Corporation
    Inventor: Charles C. Thompson
  • Patent number: 4373571
    Abstract: An apparatus and process is provided for electromagnetically forming a material into a desired thin strip shape. The apparatus and process includes a first portion containing a sump of said material in molten form. A second portion is located downstream of and communicates with the first portion. The second portion defines a containment zone of 5 mm or less for electromagnetically shaping the molten material into the thin strip shape whereby efficiency is improved through reduction of power consumption.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: February 15, 1983
    Assignee: Olin Corporation
    Inventors: John C. Yarwood, Gerhart K. Gaule, Gary L. Ungarean
  • Patent number: 4372101
    Abstract: A process for forming synthetic fibers into bales by multi-stage compression involves feeding the synthetic fibers to a plurality of depositing units wherein the fibers are precompressed into a retaining bin positioned at each of the depositing units to form a precompressed fiber parcel and then a plurality of the retaining bins are routed via guide means along a single continuous path to a central press unit wherein the parcels within the retaining bins are successively subjected to a finishing compression to form bales and, thereafter, the compacted bales are removed successively from the retaining bins and the empty retaining bins are, successively, returned along a single guide path back to individual guide paths leading to the depositing units.
    Type: Grant
    Filed: February 8, 1980
    Date of Patent: February 8, 1983
    Inventor: Hans Fleissner
  • Patent number: 4372369
    Abstract: A homogeneous mixture of liquid-solid metal is shaped by passing the composition from an agitation zone onto a surface moving relative to the exit of the agitation zone. A portion of the composition contacting the moving surface is solidified and the entire composition then is formed.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: February 8, 1983
    Assignee: Massachusetts Institute of Technology
    Inventors: Merton C. Flemings, Tooru Matsuniya
  • Patent number: 4369832
    Abstract: A continuous lubrication casting mold for use in a process of continuously casting molten metals and alloys wherein a parting and/or lubricating agent reservoir is provided in the mold body. The agent is continuously applied over the inner surface of the mold after being introduced through passages within or through the mold section. The lubricant passages may be an intrinsic characteristic of the mold material or may be provided in the form of feed holes through the mold section. The ability to transmit lubricant through to the internal surface of the mold can be varied within the length of the casting mold to provide for variable lubricant transfer rates to different parts of the casting surface.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: January 25, 1983
    Assignee: Olin Corporation
    Inventors: Michael J. Pryor, Derek E. Tyler
  • Patent number: 4368774
    Abstract: Mould for the horizontal continuous casting of metals comprising a first mould part which is adapted to have an intensive cooling effect on the metal being cast and which has a reduced inflow cross-section for the metal relative to casting cavity; a support frame; and a second mould part which is formed by several elements carried by the support frame, the elements being movable radially relative to the support frame.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: January 18, 1983
    Inventors: Alfred Adamec, Roland Leder
  • Patent number: 4369023
    Abstract: The present invention is a shot making apparatus which allows rapid and reliable production of shot and which is relatively compact in size. The shot making apparatus comprises a receptacle for lead, at least one nozzle for discharging molten lead in droplet form from the receptacle, a heating means being disposed such as to heat the chute, a chute being disposed at a spacing from and at a downwardly inclined angle to the nozzle(s), and a container(s) for liquid coolant and lead droplets discharged from said nozzle(s).
    Type: Grant
    Filed: August 4, 1980
    Date of Patent: January 18, 1983
    Inventor: David S. Baker
  • Patent number: 4367784
    Abstract: Steel powders are added to steel in a stream of inert gas introduced into the ladle above the casting mold, at a point near the exit of the steel from the ladle. The powders are thus entrained in the metal entering the mold and dissolve therein. The lance that injects the powders may also plug the ladle outlet. The powders can be used not only to perform their cooling function but also to introduce alloying elements.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: January 11, 1983
    Assignee: Centro Sperimentale Metallurgico S.p.A.
    Inventors: Alberto Praitoni, Antonio Spaccarotella
  • Patent number: 4367783
    Abstract: An improvement in continuous metal casting machines of the type having a pair of flexible, moving casting belts which revolve along endless paths for defining a casting region therebetween and moving side dams which revolve along with the casting belts for confining the cast strip, slab or bar laterally. The casting belts are individually supported by upper and lower carriage means. The machine is provided with sensors such as load cells for sensing the displacement forces existing between the upper and lower carriages at selected points along the path of belt travel, and for sensing the side pressures exerted upon the side dams by the cooling, solidifying metal. This sensing permits the maintenance of predetermined, desired contact pressures along the length of the solidifying metal to thereby improve the physical characteristics of the cast product.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: January 11, 1983
    Assignee: Hazelett Strip-Casting Corporation
    Inventors: John F. B. Wood, Stanley W. Platek, Joseph C. O'Kane, Gary P. Ackel
  • Patent number: 4363352
    Abstract: A continuous lubrication casting mold for use in a process of continuously casting molten metals and alloys wherein a parting and/or lubricating agent reservoir is provided in the mold body. The agent is continuously applied over the inner surface of the mold after being introduced through passages within or through the mold section. The lubricant passages may be an intrinsic characteristic of the mold material or may be provided in the form of feed holes through the mold section. The ability to transmit lubricant through to the internal surface of the mold can be varied within the length of the casting mold to provide for variable lubricant transfer rates to different parts of the casting surface.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: December 14, 1982
    Assignee: Olin Corporation
    Inventors: Michael J. Pryor, Derek E. Tyler
  • Patent number: 4362203
    Abstract: A novel process for preparing foundry cores or molds and binder materials used therefor are provided. The binder materials comprise (a) an alcohol-soluble phenolic resin, (b) a polyvalent metal hydroxide and/or oxide, (c) water, (d) an organic solvent, and (e) an alkali metal hydroxide. They are admixed with refractory particles, such as sand, and cured with carbon dioxide to form shaped foundry cores or molds. The process and materials of the invention bring about such advantages that curing may be performed with safe carbon dioxide, that shaped foundry cores or molds may be taken out from pattern immediately after curing, and that the products have a superior collapsibility after pouring a molten metal.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: December 7, 1982
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Susumu Konii, Shigeo Sase, Masatoshi Yoshida, Shoei Kuroda, Takeshi Sumi
  • Patent number: 4362204
    Abstract: A method and apparatus is disclosed for the high-speed production of foundry cores of the type in which a foundry aggregate is mixed with a curable binder, preferably an isocyanate or phenolic material, to form a core mixture which is carried within a hermetically sealed core box and is hardened by the introduction into the core box of a gaseous curing agent, preferably an amine. A positive displacement pump pumps a predetermined amount of liquid amine from a holding tank to a vaporizer where it is heated and completely vaporized. The vaporized curing agent is forced from the vaporizer by the introduction of an inert gas, preferably nitrogen, and the mixture of the inert gas and the vaporized curing agent is entrained in a low pressure air stream which carries it to the core box, thereby curing the core. After the core is cured, valves close to stop the flow of the low pressure air stream, the mixture of inert gas and curing agent to the low pressure air stream, and the flow of inert gas to the vaporizer.
    Type: Grant
    Filed: October 8, 1981
    Date of Patent: December 7, 1982
    Assignee: The Mead Corporation
    Inventors: Russell H. Moore, Patrick O'Meara
  • Patent number: 4361181
    Abstract: A casting core for the creation of difficultly accessible cavities in castings of aluminum or of one of its alloys, produced from a water-soluble salt as base substance and burnt sugar as binding agent, and a process for the production of such a casting core wherein the base substance is mixed with burnt sugar in aqueous or organic solution, pressed in molds, and baked at elevated temperature.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: November 30, 1982
    Assignee: Alcan Aluminiumwerk Nurnberg GmbH
    Inventors: Wolfram Wischnack, Alfred Dobner
  • Patent number: RE31488
    Abstract: A core assembly is formed by fabricating a first core, molding a destructible plastic layer around the first core, and molding a second core around the plastic layer. The plastic layer is interlocked .[.wth.]. .Iadd.with .Iaddend.an irregular outer surface of the first core, and the second core is interlocked with an irregular outer surface of the plastic layer. The core assembly can be used for casting engine cylinder heads to eliminate the need for gluing cores together and the accompanying formation of fins within fluid conducting passages.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: January 10, 1984
    Assignee: Deere & Company
    Inventor: David V. Trumbauer