Patents by Inventor Go KUROIWA

Go KUROIWA 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).

  • Cup-shaped flexible externally toothed gear and cup-type strain wave gearing
    Patent number: 10352427
    Abstract: In the cup-shaped externally toothed gear, the outside end face profile of the diaphragm is defined by a first concave circular arc having a first radius, a second concave circular arc that has a second radius and is smoothly connected to the first concave circular arc, an inclined straight line that is smoothly connected to the second concave circular arc and is inclined toward an inside straight line with respect to the center axis line, the inside straight line defining the outside profile of the diaphragm. The second radius is larger than the first radius, and the thickness of the diaphragm is gradually decreased from the side of the boss to the side of the cylindrical body. The stress concentration in the boss-side joint portion of the diaphragm can be relieved, whereby enhancing fatigue strength of the flexible externally toothed gear.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: July 16, 2019
    Assignee: Harmonic Drive Systems Inc.
    Inventors: Noboru Takizawa, Go Kuroiwa
  • CUP-SHAPED FLEXIBLE EXTERNALLY TOOTHED GEAR AND CUP-TYPE STRAIN WAVE GEARING
    Publication number: 20170227106
    Abstract: In the cup-shaped externally toothed gear, the outside end face profile of the diaphragm is defined by a first concave circular arc having a first radius, a second concave circular arc that has a second radius and is smoothly connected to the first concave circular arc, an inclined straight line that is smoothly connected to the second concave circular arc and is inclined toward an inside straight line with respect to the center axis line, the inside straight line defining the outside profile of the diaphragm. The second radius is larger than the first radius, and the thickness of the diaphragm is gradually decreased from the side of the boss to the side of the cylindrical body. The stress concentration in the boss-side joint portion of the diaphragm can be relieved, whereby enhancing fatigue strength of the flexible externally toothed gear.
    Type: Application
    Filed: January 18, 2017
    Publication date: August 10, 2017
    Applicant: Harmonic Drive Systems Inc.
    Inventors: Noboru TAKIZAWA, Go KUROIWA