Having Balancing Means Patents (Class 164/287)
  • Patent number: 10052738
    Abstract: An embodiment of an apparatus includes a centrifugal drive unit, an arm assembly, an optional dynamic balancing ring, and a workpiece fixture. The arm assembly is operatively connected to the centrifugal drive unit and configured to revolve about a primary axis perpendicular to the arm. The workpiece fixture is mounted to the arm assembly, and is configured to rotate at least one workpiece about at least one secondary axis outboard of the primary axis.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: August 21, 2018
    Assignee: United Technologies Corporation
    Inventors: Wendell V. Twelves, Jr., John P. Rizzo, Jr., Evan Butcher, Lexia Kironn, Joseph Ott
  • Publication number: 20100116454
    Abstract: A centrifugal casting method and apparatus for casting molten metal into a mold. The casting apparatus includes a housing provided with a bottom surface and a retaining wall for minimizing a number of projectiles that escape the housing during casting operations. A prime mover is provided for imparting a centrifugal force on the molten metal, and an arm is coupled to the prime mover adjacent to a proximate end to be rotated about a rotational axis and to support a cradle for receiving the mold adjacent to a distal end. A crucible is to be coupled to the arm for supporting the molten metal to be cast into the mold, while a catch surface is disposed between the arm and the bottom surface of the housing to collect molten metal that is cast but not received within the mold.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 13, 2010
    Inventors: Demetrios Kountis, James Hedderly
  • Patent number: 6997236
    Abstract: A bearing arrangement for a centrifugation injection mold, comprising an upper mold portion (10) and a lower mold portion (20), which are respectively and rotatively mounted to an upper bearing (30) and to a lower bearing (40), the latter comprising: a first flat ring (41) affixed to a machine structure (E) and presenting a radial gap that is internal in relation to the lower mold portion (20); an annular cage (42) bearing spheres (44) seated on the first flat ring (41), said annular cage (42) presenting radial gaps that are external and internal in relation to the machine structure (E) and to the lower mold portion (20), respectively; and a second flat ring (45) inferiorly seated on the spheres (44) of the annular cage (42) and maintaining radial gaps that are external and internal in relation to the machine structure (E) and to the lower mold portion (20), respectively, axially bearing the latter.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: February 14, 2006
    Assignee: Empresa Brasileira de Compressores S.A.
    Inventors: Rivio Arturo Ramirez, Antonio Sardo
  • Publication number: 20020079081
    Abstract: A thin-strip casting device (1) assures across the entire selected range of the width an about constant production of thin-strip (12) without requiring artificially extended charging times of the steel plant installed upstream. A multitude of interchangeable pairs of casting rollers (2) having different casting roller diameters “D” depending on the strip width “B” to be cast, are associated with the thin-strip casting device (1).
    Type: Application
    Filed: December 7, 2001
    Publication date: June 27, 2002
    Inventor: Georg Bollig
  • Patent number: 5452754
    Abstract: With the centrifugal casting apparatus, the rotating arm is never loosened to thereby obtain good casting quality even if rapid variation in speed is generated upon rotating of the rotating arm at high speed. The centrifugal casting apparatus is provided with a rotating shaft 51, a rotating arm 1 fixed to the shaft 51, a crucible 3, a mold 4 and the like provided at one end of the arm 1, and a balance weight 2 provided at the other end. The apparatus is provided with arm fixing bolts 12a, 12b for fixing the arm 1 to the shaft 51 and positioned so as to be deviated from the rotational center 15 of the shaft 51. The rotating shaft 51 is provided with fulcrum pins 18a, 18b serving as fulcrum for balance of the arm 1. The fulcrum pins 18a, 18b protrude from the shaft 51 when the balance of the arm 1 is adjsted, and retract into the shaft 51 when the arm 1 and the shaft 51 are fixed.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: September 26, 1995
    Assignee: M. Yasui & Co., Ltd.
    Inventor: Shozui Yasui
  • Patent number: 5337804
    Abstract: An adjustable investment mold positioner includes a resilient band bent into a partial cylinder. Opposite ends of the band bound an opening at the side of the cylinder. A mold receiving member made of bent metal has side walls with bent connectors that are attached to the opposite ends of the band. A recess is formed between the side walls for receiving an oval investment mold. The outer cylindrical configuration of the positioner is readily engageable within the cradle of a conventional casting machine which is designed for normally receiving cylindrical investment molds. In this way, oval investment molds can be received in a secure manner within the conventional casting machines.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: August 16, 1994
    Assignee: Belle De St. Claire
    Inventors: Robert P. Berger, Steven Benson
  • Patent number: 4802526
    Abstract: A centrifugal caster arrangement including: a motor driven centrifuge arm and a weight arm connected to the centrifuge arm, with both arms being rotatable about a vertical axis. A counterweight is permanently fixed to the weight arm and a casting chamber is connected to the centrifuge arm. A melting crucible is disposed in the casting chamber. A plurality of muffle sets is provided with each muffle set including an exchangeable muffle cage and an associated casting muffle inserted therein. The casting chamber is provided with a region for mounting one of the muffle sets. Each exchangeable muffle cage is matched to its associated casting muffle according to size and weight so that the total weight of each respective muffle set is such magnitude that when each respective muffle set is mounted in the casting chamber and rotated about the vertical axis the centrifuge arm is in balance with the weight arm and the permanently fixed counterweight.
    Type: Grant
    Filed: July 22, 1983
    Date of Patent: February 7, 1989
    Assignee: Fried. Krupp GmbH
    Inventors: Ronald Friedrich, Werner Hammecke, deceased, Ronald Friedrich
  • Patent number: 4796686
    Abstract: A device affixed to a centrifugal force casting machine that developes a vacuum as it travels through the air on the spinning arm of the casting machine. The developed vacuum is used to evacuate unwanted gasses from a casting mold.
    Type: Grant
    Filed: August 20, 1986
    Date of Patent: January 10, 1989
    Inventor: Donald W. Gayso
  • Patent number: 4762165
    Abstract: Metal material is melted by moving the magnetic flux of electromagnets virtually perpendicular to an arc column to apply Lorentz force to the arc column and the metal material so that the arc column can move over the metal material surface. The movement direction and speed of the arc column are determined by detecting the arc voltage of the arc column. Feed back control is performed by comparing the obtained detection data with preset data so that optimum control is performed, and the molten metal is poured into a casting mold.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: August 9, 1988
    Assignee: Kabushiki Kaisha Morita Seisakusho
    Inventors: Sekiya Ogino, Shigehiko Inoue, Touru Tomai, Masami Tamura
  • Patent number: 4729780
    Abstract: A centrifugal casting device adapted to mold and cast a casting material melted by a casting material melting means, by the centrifugal force of a rotary arm, in a mold disposed on the centrifugal side of the arm through a casting crucible disposed at one end of the arm, in which device the melting means is designed to move outside the path of rotation of the arm at least when the arm is rotated so as to reduce the force of rotation of the arm to thereby increase efficiency of casting. And also a centrifugal casting device having the above features in which device the righting reaction of a charged compression spring is used as the driving force of the rotary arm and further included a clutch member and sensors so that the rotary arm stops as soon as possible at the end of casting and returns automatically to its normal position after stopping so as to be ready for the next step of casting and so as to automatically keep the force of rotation of the arm invariably constant.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: March 8, 1988
    Assignees: Kabushiki Kaisha Denken, Kyocera Corporation
    Inventor: Toshio Shimizu
  • Patent number: 4640334
    Abstract: A melt receptacle (4) together with a muffle (5) attached thereto by a connector is situated on a centrifugal arm (2) of a centrifugal device, which arm rotates during the casting operation. On a common structural unit (8) are situated a preheater furnace (1) and the connector (9,13) in a manner to allow, respectively, for the conveyance of the muffle (5) from the preheater furnace and the fastening thereto for which connector there can be used a manipulator arm (12) which carries out only one shifting movement in one plane and engages the muffle (5).
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: February 3, 1987
    Inventor: Rudi Koerner
  • Patent number: 4557314
    Abstract: A centrifuge or casting machine has an arm disposed perpendicularly to the axis of a spring motor. One end of the arm supports a mold or flask. The opposite end includes a toothed scale for setting counterweights along the arm according to a set of predetermined locations which carry indicia related to the dimensions of the flask to be centrifuged. An overrunning clutch is included in the base of the centrifuge to engage the arm during wind-up and acceleration. The arm runs free for rotation during deceleration. Swing of the flask is limited to facilitate acceleration of the motor.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: December 10, 1985
    Assignee: Buffalo Dental Mfg., Co., Inc.
    Inventors: John Dulski, John Klobas
  • Patent number: 4549339
    Abstract: A method and an apparatus for manufacturing a hollow curved member, especially a curved pipe as well as the curved member or pipe produced by the method and apparatus. A blank is formed by rotating fluid material in a mold having a toroidal cavity about an axis displaced a predetermined distance from the mean longitudinal axis of the cavity and solidifying the fluid material. The blank is removed from the mold and a toroidal inner surface is machined into the blank so as to provide a passageway therethrough. In the preferred embodiment, the toroidal cavity is circular in cross-section and has a circular arcuate axis and the inner surface is machined into the blank coaxial with the outer surface of the blank.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: October 29, 1985
    Inventor: Pierre Lajoye
  • Patent number: 4527610
    Abstract: Due to the inclination of a centrifuge arm of a centrifugal casting arrangement the mass of a muffle or retort and a compensation or balancing mass come to lie essentially in the same rotational plane. The infinite adjustment of a muffle or retort holder and the compensation or balancing mass is accomplished by a drive rod movably arranged within the centrifuge arm as well as by a gear rack driven by the drive rod and upon which there is seated the muffle holder. A housing structure containing a cover member prevents access to the centrifugal casting arrangement during operation of the centrifugal casting machine.
    Type: Grant
    Filed: September 27, 1983
    Date of Patent: July 9, 1985
    Inventors: Werner Krebser, Karl H. Schmidt
  • Patent number: 4524816
    Abstract: A centrifugal ceramic casting furnace including a horizontal arm rotatably supported by the upper end of a vertical shaft driven by a motor and the arm having a casting ring cradle on one end, a muffle movable along said arm a limited distance toward and from the cradle and a counterweight device mounted upon the opposite end of the arm adjustably both longitudinally and upwardly in a manner to balance the opposite ends of the arm statically and also adjustably dispose the effective masses of the muffle and counterweight within a common horizontal plane to effect substantial freedom from vibration while the furnace is rotating at a centrifugal casting speed.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: June 25, 1985
    Assignee: Dentsply Research & Development Corp.
    Inventors: Richard E. Plowman, James A. VanLenten
  • Patent number: 4418740
    Abstract: A centrifugal caster comprising a motor driven centrifuge arm connected to a weight arm, both of which are rotatable about a vertical axis. A casting chamber is connected to the centrifuge arm and has a melting crucible disposed therein, and a counterweight is fixedly attached to the weight arm. The casting chamber is provided with a region for mounting a muffle set comprising a casting muffle inserted into an exchangeable muffle cage which is associated with the casting muffle according to size and weight, whereby the total weight of the muffle set is of such magnitude that upon rotation, the centrifuge arm is in balance with the weight arm and its fixedly attached counterweight.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: December 6, 1983
    Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung
    Inventors: Ronald Friedrich, Werner Hammecke, deceased
  • Patent number: 4280551
    Abstract: A centrifugal casting apparatus for dentistry comprises a rotating member or platform for the mold having a mold disposed on one side thereof, a rotating member for the crucible movably positioned at the center of revolution of the said rotating member for the mold and provided with a crucible and a melting means, and a driving mechanism therefor, whereby metal for dentistry uses charged into the crucible is heated to be molten, while the mold is caused to rotate about the periphery of the crucible by means of the rotating member for the mold, and, after melting of the metal for dentistry uses is completed, the rotating member for the crucible is brought into engagement with the rotating member for the mold for rotation therewith where the metal in the molten state is cast from the crucible into the mold through impact force produced upon transmission of rotation as well as centrifugal force after initiation of rotation.
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: July 28, 1981
    Inventor: Isao Ohara
  • Patent number: 4273181
    Abstract: A centrifugal-casting machine includes a rotatable subassembly that has a generally planar support plate extending perpendicularly to the axis of rotation and a generally cylindrical shield portion extending from the periphery of the support plate. The shield rotates with the rotatable subassembly. A handle means slides in a track on the support plate and has a handle portion and a catch portion. In one position of the handle means, the catch portion engages a stop portion of the base in which the rotatable subassembly is journaled, and in the other position the catch portion does not engage the stop portion, so the rotatable subassembly can rotate freely. Winding, locking, and release can thereby all be effected by manipulation of the handle portion of the handle means.
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: June 16, 1981
    Assignee: The J. M. Ney Company
    Inventor: Irving G. Winer
  • Patent number: 4134445
    Abstract: The disclosure embraces a centrifugal casting apparatus of a character for casting comparatively small articles or objects of highly refractory metals, such as jewelry and similar articles, the centrifugal casting apparatus being enclosed in a housing, the arrangement having a motor-driven throwing arm and a secondary arm mounting components of the casting apparatus, the secondary arm being adapted upon energization of the motor to be centrifugally oscillated or rotated about a pivot axis to a diametrically aligned position with the throwing arm to rapidly accelerate flow of the molten casting metal into the mold, the apparatus including a closure or cover for the housing in association with means for automatically interrupting operation of the motor when the cover or closure is moved to an open position.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: January 16, 1979
    Assignee: Dick Blick Company
    Inventors: William F. Goodrich, Robert C. Ingersoll, Donald W. Doman
  • Patent number: 3965968
    Abstract: A device adapted for the production of a hollow body with an extension in a built-up metal mould provided with lining. The spinning axis of the built-up metal mould is essentially coaxial with the mould longitudinal axis owing to which the filling of the cavity provided in said mould with molten metal causes a progressing unbalance of the device. For offsetting this unbalance provision is made for a movable weight travelling radially to the spinning axis of said metal mould as the unbalance is being progressed.
    Type: Grant
    Filed: December 24, 1974
    Date of Patent: June 29, 1976
    Inventors: Nikolai Nikitievich Alexandrov, Nikolai Nikolaevich Zorev, Viktor Mikhailovich Krapukhin, Viktor Vasilievich Krotov, Ivan Romanovich Kryanin, Boris Samoilovich Milman, Pavel Vladimirovich Semenov, Nikolai Anatolievich Sokolov, Viktor Gurievich Tinyakov