Patents by Inventor Syoiti Umekawa

Syoiti Umekawa 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).

  • Adjustment method for spark plug and apparatus therefor
    Patent number: 5741963
    Abstract: To improve the accuracy of the automatic adjustment of a spark plug and the adjustment of the eccentricity of a multiple-electrode spark plug, a spark plug holder 2 for supporting and fixing a lower portion of the multiple-electrode spark plug 1 and a positioning device 3 for supporting and positioning an upper portion of the multiple-electrode spark plug 1 are provided to an adjustor for automatically regulating the gap and the eccentricity of the multiple-electrode spark plug having a center electrode and at least one ground electrode. A projector 4 projects light to the multiple-electrode spark plug 1 from above the positioning device 3. A CCD camera 5 produces images of the spark gap/eccentricity of the multiple-electrode spark plug 1. An image processor 6 executes image processing for inputting the images from the CCD camera 5 and determining the spark gap/eccentricity.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: April 21, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroshi Nakatani, Tsutomu Ozawa, Syoiti Umekawa, Hirofumi Nishiwaki