Patents by Inventor Katutosi Nii

Katutosi Nii 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).

  • Grooved spherical bearing for vertical machines
    Patent number: 4093320
    Abstract: A bearing consisting of a pivot having a semi-spherical or hemi-spherical end portion formed with helical grooves and immersed in lubricating oil, and a cup bearing element also immersed in lubricating oil for supporting the pivot. A plurality of helical grooves disposed on the semi-pherical end portion are formed and arranged such that the lubricating oil is supplied under pressure to sliding surfaces of the pivot and the cup bearing element. An annular recess is formed on the intake side of the grooves.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: June 6, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Ryoichi Kaneko, Katutosi Nii, Hiroo Hiroyama, Kinpei Okano