Patents by Inventor Keitaro Yokokawa

Keitaro Yokokawa 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).

  • Publication number: 20100077667
    Abstract: A door panel that is capable of ensuring sufficient strength at a portion where a hinge is attached to a double-panel structure including an outer panel and an inner panel, and is also capable of preventing entry of rain water or the like from the aforementioned portion, is provided. An internal reinforcing plate for mounting hinges is immovably sandwiched between the outer panel and the inner panel, which is affixed to the inner surface of the outer panel. The internal reinforcing plate has bolt insertion holes, and nuts that are conjoined with the reverse surface of the internal reinforcing plate. The inner panel includes hinge mounting surface portions provided at such a location as to overlap the internal reinforcing plate. The hinge mounting surface portions have bolt insertion holes.
    Type: Application
    Filed: July 15, 2008
    Publication date: April 1, 2010
    Applicant: CATERPILLAR JAPAN LTD.
    Inventors: Ryoji Uto, Keitaro Yokokawa, Eri Uchikoshi, Hiroe Takano
  • Publication number: 20100048122
    Abstract: The aperture area efficiency of a door panel with a double-panel structure having an outer panel and an inner panel is increased, while turbulent flow of air through ventilation holes is reduced. The outer panel 21 is provided with a plurality of honeycomb ventilation hole sections 26, each of which comprises a plurality of hexagonal ventilation holes 25 that are formed in the outer panel 21 so as to be arranged in a honeycomb pattern, with each side of each ventilation hole 25 being adjacent to a side of another ventilation hole 25 with a connecting portion 25a therebetween. The inner panel 23 is provided with ventilation openings 30, each of which is slightly larger than each respective honeycomb ventilation hole section 26 of the outer panel 21.
    Type: Application
    Filed: July 4, 2008
    Publication date: February 25, 2010
    Applicant: CATERPILLAR JAPAN LTD.
    Inventors: Ryoji Uto, Keitaro Yokokawa