Patents by Inventor Edward H. Ferguson

Edward H. Ferguson 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 closure with mechanical braking means
    Patent number: 4872239
    Abstract: A mechanical disk-type door closure wherein one end of the closure is connected to a door and the other end is pivotally connected to a door jam such that when the door pivots about its hinge. The closure includes a rod upon which a rack is formed to cause a pinion to rotate in one direction and which is in mesh with a gear so as to move the pinion out of contact with the rack. When the door closes, a spring moves the pinion into engagement with the rack and the pinion turns in a direction to rotate the gear which is subjected braking pressure so as to adjust the resistance to the closing motion of the door.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: October 10, 1989
    Assignee: The Chamberlain Group, Inc.
    Inventors: Edward H. Ferguson, Kiyoshi Iha