Patents by Inventor Ryoji Sunami

Ryoji Sunami 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).

  • Switching power supply
    Patent number: 6961244
    Abstract: A switching power supply includes a switching circuit, a main transformer, a rectifier circuit, and an output smoothing circuit, which are mounted on a base plate. Voltage transformation of an inputted direct current voltage is performed through collaboration among the above. A pedestal portion is formed on the base plate, and a channel to cool down electronic parts such as a diode is formed inside the pedestal portion. Since the channel is thus formed inside the pedestal portion, the device will not be larger-sized even when the channel is formed. Moreover, at least any of a switching element and a diode is mounted on the pedestal portion, and a choke coil is mounted in a region other than a region where the pedestal portion is formed. Therefore, even with the pedestal portion, it is significantly suppressed for the device to be larger-sized.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: November 1, 2005
    Assignee: TDK Corporation
    Inventors: Takahiro Tsuchiya, Ryoji Sunami
  • Switching power supply
    Publication number: 20040190318
    Abstract: A switching power supply includes a switching circuit, a main transformer, a rectifier circuit, and an output smoothing circuit, which are mounted on a base plate. Voltage transformation of an inputted direct current voltage is performed through collaboration among the above. A pedestal portion is formed on the base plate, and a channel to cool down electronic parts such as a diode is formed inside the pedestal portion. Since the channel is thus formed inside the pedestal portion, the device will not be larger-sized even when the channel is formed. Moreover, at least any of a switching element and a diode is mounted on the pedestal portion, and a choke coil is mounted in a region other than a region where the pedestal portion is formed. Therefore, even with the pedestal portion, it is significantly suppressed for the device to be larger-sized.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 30, 2004
    Applicant: TDK CORPORATION
    Inventors: Takahiro Tsuchiya, Ryoji Sunami
  • Electronic components mounting structure
    Patent number: 6493234
    Abstract: According to the present invention, there is provided an electronic components mounting structure constituted by a plurality of electronic components having lead terminals respectively, and conductors having connection portions to be connected to the lead terminals of the electronic components, in which the lead terminals of the electronic components are aligned with the connection portions of the conductors and the lead terminals and the connection portions are welded with each other.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: December 10, 2002
    Assignee: TDK Corporation
    Inventors: Ryoji Sunami, Takahiro Tsuchiya
  • Electronic components mounting structure
    Publication number: 20020051348
    Abstract: According to the present invention, there is provided an electronic components mounting structure constituted by a plurality of electronic components having lead terminals respectively, and conductors having connection portions to be connected to the lead terminals of the electronic components, in which the lead terminals of the electronic components are aligned with the connection portions of the conductors and the lead terminals and the connection portions are welded with each other.
    Type: Application
    Filed: October 23, 2001
    Publication date: May 2, 2002
    Applicant: TDK CORPORATION
    Inventors: Ryoji Sunami, Takahiro Tsuchiya