Patents by Inventor Richard A. Ranlof

Richard A. Ranlof has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • High efficiency induction heating and melting systems
    Patent number: 6690710
    Abstract: An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductors to form an induction furnace that, along with its associated power supply, provides a compact design. The system components are air-cooled; no water-cooling is required. The crucible may alternatively be shaped as a tunnel or enclosed furnace.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: February 10, 2004
    Assignee: Inductotherm Corp.
    Inventors: Oleg S. Fishman, John H. Mortimer, Joseph T. Belsh, Aurelian Mavrodin, Richard A. Ranlof
  • High efficiency induction heating and melting systems
    Publication number: 20020159498
    Abstract: An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductors to form an induction furnace that, along with its associated power supply, provides a compact design. The system components are air-cooled; no water-cooling is required. The crucible may alternatively be shaped as a tunnel or enclosed furnace.
    Type: Application
    Filed: April 29, 2002
    Publication date: October 31, 2002
    Inventors: Oleg S. Fishman, John H. Mortimer, Joseph T. Belsh, Aurelian Mavrodin, Richard A. Ranlof
  • High efficiency induction melting system
    Patent number: 6393044
    Abstract: An induction melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductors to form an induction furnace that, along with its associated power supply, provides a compact design. The system components are air-cooled; no water-cooling is required. The induction melting system is particularly useful for separating metal from scrap, casting molds directly from the induction furnace, and providing a continuous supply of molten metal.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: May 21, 2002
    Assignee: Inductotherm Corp.
    Inventors: Oleg S. Fishman, John H. Mortimer, Joseph T. Belsh, Richard A. Ranlof, Aurelian Mavrodin
  • Fault tolerant power supply circuit
    Patent number: 6038157
    Abstract: A fault tolerant power supply circuit for a series resonant load having an inductive impedance. The power supply circuit includes alternately conducting first and second sets of switches for supplying current to the load in alternating directions. One terminal of the load is connected to a point intermediate the switches. A protective coil is connected in series with the load and the point intermediate said switches. In one embodiment of the invention, a di/dt reactor is connected in series between the switches. In that embodiment, one end of the protective coil is connected to the load and the other end of the protective coil is connected to the di/dt reactor at a point intermediate the switches.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: March 14, 2000
    Assignee: Inductotherm Corp.
    Inventors: John H. Mortimer, Oleg S. Fishman, Simeon Z. Rotman, Richard A. Ranlof