Patents by Inventor Yoshiyuki HIRADE

Yoshiyuki HIRADE 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).

  • Side rail and oil control ring comprising same
    Patent number: 11994219
    Abstract: A side rail forms an oil control ring together with a spacer expander, and includes: an outer peripheral surface; an inner peripheral surface having a vertically symmetrical shape in an axial cross section; a first side surface; and a second side surface. The inner peripheral surface includes an inner tip portion satisfying following Condition 1 in an axial cross section. 0.7?R1/h0?1.1??Condition 1: In the expression, R1 represents a curvature radius (unit: mm) of a curve forming the inner tip portion, and h0 represents a height (unit: mm) of the side rail.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: May 28, 2024
    Inventors: Hiroyuki Yabune, Yoshiyuki Hirade, Kentaro Miyagawa
  • SIDE RAIL AND OIL CONTROL RING COMPRISING SAME
    Publication number: 20240084894
    Abstract: A side rail forms an oil control ring together with a spacer expander, and includes: an outer peripheral surface; an inner peripheral surface having a vertically symmetrical shape in an axial cross section; a first side surface; and a second side surface. The inner peripheral surface includes an inner tip portion satisfying following Condition 1 in an axial cross section. 0.7?R1/h0?1.1??Condition 1: In the expression, R1 represents a curvature radius (unit: mm) of a curve forming the inner tip portion, and h0 represents a height (unit: mm) of the side rail.
    Type: Application
    Filed: March 4, 2022
    Publication date: March 14, 2024
    Inventors: Hiroyuki YABUNE, Yoshiyuki HIRADE, Kentaro MIYAGAWA