Patents by Inventor Takasi Hatanaka

Takasi Hatanaka 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).

  • Universal joint
    Patent number: 6398656
    Abstract: A universal joint comprises a first rotation guide member, a second rotation guide member guided by the first rotation guide means to be rotatable, and a third rotation guide member guided by the second rotation guide member to be rotatable. The first, second and third rotation guide means being operatively connected through connection members so as to provide three degrees of rotational freedom. The first, second and third rotation guide members are preferably swiveling bearings having rotational center lines, respectively, which intersect each other at one point.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: June 4, 2002
    Assignee: THK Co. Ltd.
    Inventors: Hidekazu Michioka, Takasi Hatanaka, Tadashi Hirokawa