Patents by Inventor Haruki Tsutsui

Haruki Tsutsui 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).

  • Rolling elements for rolling bearing, method of producing the same, and rolling bearing
    Patent number: 7146734
    Abstract: A method of producing rolling elements for a rolling bearing comprises mixing to process rounded elements made of steel balls and spherical rolling elements having outer diameter portion portion becoming a rolling contact face. The rolling contact face has curvatures in an axial direction and a radial direction normal to the axial direction, and has at least one plane. The thus mixed elements are placed and processed in a space between two processing boards opposing each other via the determined space. Thereby, the surfaces of the rounded balls and the rolling elements are processed to be rounded.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: December 12, 2006
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Katsuhiro Yamazaki, Haruki Tsutsui
  • Rolling elements for rolling bearing, method of producing the same, and rolling bearing
    Publication number: 20040120623
    Abstract: A method of producing rolling elements for a rolling bearing comprises mixing to process rounded elements made of steel balls and spherical rolling elements having outer diameter portion portion becoming a rolling contact face. The rolling contact face has curvatures in an axial direction and a radial direction normal to the axial direction, and has at least one plane. The thus mixed elements are placed and processed in a space between two processing boards opposing each other via the determined space. Thereby, the surfaces of the rounded balls and the rolling elements are processed to be rounded.
    Type: Application
    Filed: December 12, 2003
    Publication date: June 24, 2004
    Applicant: NSK Ltd.
    Inventors: Takashi Murai, Katsuhiro Yamazaki, Haruki Tsutsui
  • Rolling elements for rolling bearing, method of producing the same, and rolling bearing
    Patent number: 6752696
    Abstract: A method of producing rolling elements for a rolling bearing comprises mixing to process rounded elements made of steel balls and spherical rolling elements having outer diameter portion portion becoming a rolling contact face. The rolling contact face has curvatures in an axial direction and a radial direction normal to the axial direction, and has at least one plane. The thus mixed elements are placed and processed in a space between two processing boards opposing each other via the determined space. Thereby, the surfaces of the rounded balls and the rolling elements are processed to be rounded.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: June 22, 2004
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Katsuhiro Yamazaki, Haruki Tsutsui
  • Rolling elements for rolling bearing, method of producing the same, and rolling bearing
    Publication number: 20020141677
    Abstract: A method of producing rolling elements for a rolling bearing comprises mixing to process rounded elements made of steel balls and spherical rolling elements having outer diameter portion portion becoming a rolling contact face. The rolling contact face has curvatures in an axial direction and a radial direction normal to the axial direction, and has at least one plane. The thus mixed elements are placed and processed in a space between two processing boards opposing each other via the determined space. Thereby, the surfaces of the rounded balls and the rolling elements are processed to be rounded.
    Type: Application
    Filed: March 11, 2002
    Publication date: October 3, 2002
    Applicant: NSK LTD.
    Inventors: Takashi Murai, Katsuhiro Yamazaki, Haruki Tsutsui