Patents by Inventor Eric A. Niemi

Eric A. Niemi 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).

  • Shift rod piston seal arrangement for a vibratory plate compactor
    Patent number: 7165469
    Abstract: An easily accessible phase adjustment mechanism for a vibratory plate compactor includes an improved seal arrangement to protect against leakage of internal lubricating oil into the hydraulic cylinder providing fluid pressure to the adjustment mechanism. An easily demountable cylinder housing provides ready access to the piston and seal assembly which can then be threadably detached and replaced in its entirety.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: January 23, 2007
    Assignee: M-B-W Inc.
    Inventors: Eric A. Niemi, Michael W. Schmitt
  • Shift rod piston seal arrangement for a vibratory plate compactor
    Publication number: 20040200299
    Abstract: An easily accessible phase adjustment mechanism for a vibratory plate compactor includes an improved seal arrangement to protect against leakage of internal lubricating oil into the hydraulic cylinder providing fluid pressure to the adjustment mechanism. An easily demountable cylinder housing provides ready access to the piston and seal assembly which can then be threadably detached and replaced in its entirety.
    Type: Application
    Filed: April 10, 2003
    Publication date: October 14, 2004
    Inventors: Eric A. Niemi, Michael W. Schmitt