Patents by Inventor Yuji Oikawa

Yuji Oikawa 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).

  • Method and system for correcting errors of measurement in tire uniformity inspecting machines
    Patent number: 4404849
    Abstract: A method for correcting errors of measurement due to variations in tire pressure in a tire uniformity inspecting operation, wherein a tire is inflated and rotated between a pair of rims and a load wheel is pressed against the tire and a radial force variation of said tire is measured, including: detecting a deviation of actual air pressure of the tire from a predetermined measuring pressure level to determine a correction coefficient; calculating a value of tire uniformity from the measured value of radial force variation according to the predetermined measuring pressure level; multiplying the calculated value of uniformity by the correction coefficient to compensate for any erroneous component due to a variation in the tire pressure.
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: September 20, 1983
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Atsuaki Iwama, Yoshimata Maikuma, Masayoshi Okamoto, Toshikazu Tanaka, Yuji Oikawa
  • Method for correcting measurement errors in tire uniformity inspecting machines
    Patent number: 4404848
    Abstract: A method for correcting errors of measurement in a tire uniforming inspecting machine having a pair of upper and lower rims engageable with bead portions of a tire for gripping the tire securely for rotation at a predetermined position and a load wheel engageable with the circumference of the tire at one side thereof to check for variations in the radial force, including: measuring radial runout of the rims and/or load wheel to obtain an erronous deflection signal indicating the amount of radial runout of the rims and/or load wheel; obtaining and storing a primary harmonic component of the erroneous deflection signal; measuring variations in radial force of a tire rotated on the rims to obtain a radial variation signal for a period of one revolution of the tire; multiplying the erroneous deflection signal by a spring constant of the tire to obtain an erroneous variation signal; and subtracting the erroneous variation signal from the radial variation signal to eliminate influence of radial runout of the rims a
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: September 20, 1983
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Atsuaki Iwama, Yoshimata Maikuma, Masayoshi Okamoto, Toshikazu Tanaka, Yuji Oikawa
  • Speaker box
    Patent number: D449291
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: October 16, 2001
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Speaker box
    Patent number: D451494
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: December 4, 2001
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Combined disc player and amplifier
    Patent number: D460063
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: July 9, 2002
    Assignee: Sony Corporation
    Inventors: Yuji Oikawa, Toshiyuki Hisatsune
  • Speaker box
    Patent number: D461463
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: August 13, 2002
    Assignee: Sony Corporation
    Inventors: Yuji Oikawa, Toshiyuki Hisatsune
  • Stand for television receiver
    Patent number: D468134
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: January 7, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Combined disc player and radio receiver
    Patent number: D470832
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: February 25, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Speaker box
    Patent number: D471891
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: March 18, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Speaker box
    Patent number: D471894
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: March 18, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Combined speaker box and recorder/player
    Patent number: D472542
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 1, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Combined disc player, speaker box, radio receiver and tape recorder
    Patent number: D478059
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: August 5, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Speaker box
    Patent number: D478565
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: August 19, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Remote controller
    Patent number: D478894
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: August 26, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa
  • Remote controller
    Patent number: D478895
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: August 26, 2003
    Assignee: Sony Corporation
    Inventor: Yuji Oikawa