Patents Represented by Law Firm Helfott and Karas
  • Method and apparatus for measuring dynamic imbalance of sphere
    Patent number: 5705740
    Abstract: A sphere is supported in a floating condition by a pneumatic bearing so as to be rotated by compressed air sprayed from a nozzle. The sphere has a single point magnetized on its surface, and is placed on its rotating axis. If the sphere has a dynamic imbalance, the single point is subjected to pressesion around its inertia axis, the locus and displacement velocity of which are measured by the Hall elements arranged in an arc line around the pneumatic bearing, thereby obtaining the dynamic imbalance of the share.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: January 6, 1998
    Assignee: NSK Ltd.
    Inventors: Tetsuo Unno, Yoshio Shoda