Patents by Inventor Nobuhito Sakai

Nobuhito Sakai 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).

  • Non-retainer type rolling bearing
    Patent number: 5904426
    Abstract: Each of the inner and outer rings of a non-retainer type rolling bearing has a wear-resistant solid film of a fluorine-containing synthetic resin formed on its track surface. The solid film carries a very small amount of grease having a low vapor pressure, e.g. fluorine-containing grease, as an effective lubricant for the inner and outer rings, and the rolling elements held therebetween, while the solid film is also restrained from producing dust. The amount of the grease does not exceed 5% of the volume of the open space in the bearing.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: May 18, 1999
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Kazuo Tsuru, Tsugio Matsushita, Hiroshi Ono, Nobuhito Sakai