Patents by Inventor Shane M. Ramsdell

Shane M. Ramsdell 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).

  • Back support structure
    Patent number: 7249802
    Abstract: A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the back support about a second horizontal axis and moveably supported by a curved track formed on the housing. A leaf spring includes a first end supported by the housing and a second end biasing the back support and seat support in an upward direction. Preferably, a fulcrum member, which includes a support surface having a curvilinear contour, is moveably supported in the housing and engages a bottom surface of the spring intermediate the first and second ends of the spring. Preferably, a linkage mechanism including a first and second link is adapted to adjust the position of the fulcrum. In another preferred embodiment, a gear housing is removably disposed in said housing and coupled to the fulcrum. In one preferred embodiment, rearward and forward tilt limiters are provided.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: July 31, 2007
    Assignee: Herman Miller, Inc.
    Inventors: Johann Burkhard Schmitz, Claudia Plikat, Nicolai Neubert, Carola E. M. Zwick, Roland R. O. Zwick, Chad D. Aerts, John F. Aldrich, Christopher C. Hill, Shane M. Ramsdell, James D. Slagh, Douglas M. VanDeRiet
  • Back support structure
    Publication number: 20030178882
    Abstract: A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the back support about a second horizontal axis and moveably supported by a curved track formed on the housing. A leaf spring includes a first end supported by the housing and a second end biasing the back support and seat support in an upward direction. Preferably, a fulcrum member, which includes a support surface having a curvilinear contour, is moveably supported in the housing and engages a bottom surface of the spring intermediate the first and second ends of the spring. Preferably, a linkage mechanism including a first and second link is adapted to adjust the position of the fulcrum. In another preferred embodiment, a gear housing is removably disposed in said housing and coupled to the fulcrum. In one preferred embodiment, rearward and forward tilt limiters are provided.
    Type: Application
    Filed: February 12, 2003
    Publication date: September 25, 2003
    Inventors: Johann Burkhard Schmitz, Claudia Plikat, Nicolai Neubert, Carola E.M. Zwick, Roland R.O. Zwick, Chad D. Aerts, John F. Aldrich, Christopher C. Hill, Shane M. Ramsdell, James D. Slagh, Douglas M. VanDeRiet