Patents by Inventor Sergei Cheprasov

Sergei Cheprasov 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).

  • Patent number: 6045431
    Abstract: Improved manufacture of thin-film magnetic heads includes a piezoelectric driven actuator for bending row tools used in the mass manufacture of magnetic heads. The actuator is independent of the row tool and includes a lever arm which structurally deflects when driven by the piezoelectric element, converting physical displacement of the piezoelectric element to a force supplied to the row tool, through a portion of the lever arm arranged to undergo deflection. Arrays of piezoelectric actuators are also disclosed for individual adjustment of each magnetic head component of a row being polished.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: April 4, 2000
    Assignee: Speedfam Corporation
    Inventors: Sergei Cheprasov, Gordon J. Grosslight