Patents by Inventor Masaru Ohara

Masaru Ohara 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 for checking a spot welded portion and spot welding machine
    Patent number: 5194709
    Abstract: A decrease amount in plate thickness at a spot weld is detected at a predetermined time period when application of pressure is still maintained after termination of power supply to electrodes for spot welding. The decrease amount is correlated with the magnitude of diameter of nugget formed by spot welding, e.g., a larger diameter of nugget signifies a stronger the joint, and therefore, the quality of joint at the spot weld can be examined on the basis of the detected decrease amount. Since a value obtained by integrating plate thickness detection data of the spot weld during the predetermined time period is correlated, as the decrease amount is, with the magnitude of the diameter of a nugget, the quality of the joint may also be examined on the basis of this integrated value.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: March 16, 1993
    Assignees: Kabushiki Kaisha SG, Honda Motor Co., Ltd.
    Inventors: Wataru Ichikawa, Yuji Matsuki, Seiji Hirohashi, Masaru Ohara, Yasuyuki Mizutani, Yuji Taya, Toshiharu Nakagima, Shingi Hoshino