Patents by Inventor Duane O. Courser

Duane O. Courser 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).

  • Drive mechanism for an extendable member
    Patent number: 7607365
    Abstract: A drive mechanism having a first and second side plate opposite each other that rotatably hold an engagement shaft and a gear shaft. A rack passes between the gear shaft and engagement shaft. The first and second side plates are allowed to float vertically in a frame. The gear is maintained in constant contact with the rack when the rack is moved vertically within the frame.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: October 27, 2009
    Assignee: Liftco, Inc.
    Inventor: Duane O. Courser