Patents by Inventor William H. Rieckmann

William H. Rieckmann 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).

  • Door opener and closer
    Patent number: 6138412
    Abstract: A door opener and closer that provides motive power for opening and closing a door. A double acting cylinder pivotally mounted on the door is coupled to a roller arm. A roller on the roller arm is captive within a cage mounted to the door frame. The cylinder applies a force on the roller arm in one direction to open the door and in the opposite direction to close the door. The components are mounted in a manner such that none of the components project into the door opening. The door opener and closer eliminates the need for a separate closer. The door may be opened manually with minimum resistance.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: October 31, 2000
    Assignee: Chase Industries, Inc.
    Inventors: William H. Rieckmann, Wayne W. Bostad, deceased