Patents by Inventor Steve Van Wieran

Steve Van Wieran 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).

  • Pneumatic height adjustment column for a chair
    Patent number: 5740997
    Abstract: A pneumatic height adjustment column is provided for a chair. The column includes a support tube, a carrier tube, a pneumatic cartridge, a hub fastener, and a shaft fastener. The support tube has a top end which is generally open, and a bottom portion which is adapted to be mounted to a chair base. The bottom portion has an opening with a smaller diameter than that of the support tube. The carrier tube has a top portion adapted to be mounted to a support housing for a chair seat. The top portion has an opening with a smaller diameter than that of the carrier tube. The carrier tube also has a generally open bottom end which telescopically engages the top end of the support tube. The pneumatic cartridge has a cylinder positioned within the carrier tube, a shaft, and a hub. The cylinder has a diameter greater than that of the opening in the carrier tube. The shaft extends downwardly from the cylinder and has a bottom end which passes through the opening in the bottom of the support tube.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 21, 1998
    Assignee: Herman Miller, Inc.
    Inventor: Steve Van Wieran