Patents Assigned to Sumida Technologies Incorporated
  • Patent number: 7183886
    Abstract: An inductance device comprises a drum core having a center core, and flanges integrated therewith. The center core is wound with a wire, whereas a magnetic gap is formed between the upper flange and lower flange. The magnetic gap is closed with an insulator, mixed with a magnetic substance, having rubber elasticity. The insulator comprises an overhang and an insertion integrally formed therewith. The overhang presses a region in the upper flange so as to hang from this region. The insertion tightly fits into the magnetic gap.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: February 27, 2007
    Assignees: Sumida Technologies Incorporated, Sumida Corporation
    Inventor: Juichi Ooki
  • Publication number: 20060006970
    Abstract: An inductance device comprises a drum core having a center core, and flanges integrated therewith. The center core is wound with a wire, whereas a magnetic gap is formed between the upper flange and lower flange. The magnetic gap is closed with an insulator, mixed with a magnetic substance, having rubber elasticity. The insulator comprises an overhang and an insertion integrally formed therewith. The overhang presses a region in the upper flange so as to hang from this region. The insertion tightly fits into the magnetic gap.
    Type: Application
    Filed: September 14, 2005
    Publication date: January 12, 2006
    Applicants: Sumida Technologies Incorporated, Sumida Corporation
    Inventor: Juichi Ooki
  • Publication number: 20050219030
    Abstract: This is a small-size transformer that is made easily. Two bobbins around which a secondary coil is wound insert into bobbin protrusions from the opening surface side of the first core whereby the two bobbins are positioned in a row. A coiling protrusion around which to wrap a primary coil is formed in the aforementioned first core. Part of the primary coil coils around the coil protrusion and the remainder is positioned and coiled in a groove of the aforementioned first core provided in the outer circumference of the two bobbins. A second core is positioned in a countering position to the opening surface of the aforementioned first core so as to cover the aforementioned three protrusions.
    Type: Application
    Filed: May 20, 2005
    Publication date: October 6, 2005
    Applicants: Sumida Corporation, Sumida Technologies Incorporated
    Inventor: Tadayuki Fushimi
  • Patent number: 6933821
    Abstract: This is a small-sized transformer that is made easily. Two bobbins around which a secondary coil is wound insert into bobbin protrusions from the opening surface side of the first core whereby the two bobbins are positioned in a row. A coiling protrusion around which to wrap a primary coil is formed in the aforementioned first core. Part of the primary coil coils around the coil protrusion and the remainder is positioned and coiled in a groove of the aforementioned first core provided in the outer circumference of the two bobbins. A second core is positioned in a countering position to the opening surface of the aforementioned first core so as to cover the aforementioned three protrusions.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 23, 2005
    Assignees: Sumida Corporation, Sumida Technologies Incorporated
    Inventor: Tadayuki Fushimi
  • Publication number: 20040212319
    Abstract: A high-voltage transformer for lighting a plurality of discharge lamps has a primary coil for inputting an AC voltage and a secondary coil for outputting a predetermined AC voltage higher than the AC voltage inputted. The primary coil has a starter primary winding for initially lighting the discharge lamps, and a normal lighting primary winding for normally lighting the discharge lamps.
    Type: Application
    Filed: September 26, 2003
    Publication date: October 28, 2004
    Applicants: Sumida Technologies Incorporated, Sumida Corporation
    Inventor: Tadayuki Fushimi
  • Publication number: 20040189433
    Abstract: An inductance device comprises a drum core having a center core, and flanges integrated therewith. The center core is wound with a wire, whereas a magnetic gap is formed between the upper flange and lower flange. The magnetic gap is closed with an insulator, mixed with a magnetic substance, having rubber elasticity. The insulator comprises an overhang and an insertion integrally formed therewith. The overhang presses a region in the upper flange so as to hang from this region. The insertion tightly fits into the magnetic gap.
    Type: Application
    Filed: October 10, 2003
    Publication date: September 30, 2004
    Applicants: Sumida Technologies Incorporated, Sumida Corporation
    Inventor: Juichi Ooki
  • Patent number: 6650218
    Abstract: An inverter transformer is formed of first and second cores arranged to face each other to form a closed magnetic circuit. The first core has a central leg, an outer perimeter wall, and a partition between the central leg and the outer perimeter wall so that a first groove is formed between the central leg and the partition and a second groove is formed between the partition and the outer perimeter wall concentrically with and outside the first groove. A primary winding is disposed in the second groove, and a secondary winding is disposed in the first groove so that the primary and secondary windings are arranged in the same plane.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: November 18, 2003
    Assignees: Sumida Corporation, Sumida Technologies Incorporated
    Inventor: Tadayuki Fushimi
  • Patent number: 6356179
    Abstract: An inductance device according to the present invention, which is for use in power supply units, is constructed in such a manner that a slit 3 is provided in one side of a polygonal cylindrical ferrite core 1 in the same direction to a hollow portion 2 to form an open magnetic path, and a belt-like conductor 4 is inserted through the hollow portion 2, so as to minimize the dimensions, have an inductance value not more than 1 &mgr;H, and hold DC overlapping characteristic flat even if high current flows.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: March 12, 2002
    Assignees: Sumida Technologies Incorporated, Sumida Corporation
    Inventor: Satoru Yamada
  • Patent number: 6249202
    Abstract: A plate-like coil formed by a metal plate is buried in a base made from an insulating material in a state in which electrode terminals and a fixing terminal of the plate-like coil are projecting from the base. The base has through-holes in which a central leg and side legs of an E-shaped core are to be inserted. The E-shaped core and an I-shaped core are mounted to the base while holding the base therebetween, and the electrode terminals and the fixing terminal projecting from the base are bent to the bottom surface of the base.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: June 19, 2001
    Assignees: Sumida Corporation, Sumida Technologies Incorporated
    Inventor: Satoru Yamada