Patents by Inventor Josef August Hilmer

Josef August Hilmer 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).

  • Sealing structure for reduced lubricant leakage in a spindle motor
    Patent number: 6052257
    Abstract: A sealing structure for minimizing the leakage of bearing lubricant is described. The sealing structure includes at least one labyrinth seal which is formed between a sealing surface on one component of a spindle motor and a restrictive ring formed on an opposing component of the spindle motor such that the ring projects into close proximity to the sealing surface. One of the components is a rotating component of the spindle motor and the other component is a stationary component of the spindle motor. At least one labyrinth seal includes a splash ring and a relief groove for collecting the lubricant particles that escape from a bearing assembly in the spindle motor.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: April 18, 2000
    Assignee: International Business Machines Corporation
    Inventors: Mortiz Branger, Jose Galvan, Josef August Hilmer