Patents by Inventor Roy B. Hammer

Roy B. Hammer 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).

  • Chain drive apparatus
    Patent number: 4825999
    Abstract: A chain driving system wherein positive engagement between the driving element and the chain begins to occur only when the pitch circle of the driving element and the path of the centers of the chain link pins tangentially intersect. Such a positive engagement relationship eliminates the chordal action usually associated with chain drive systems.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: May 2, 1989
    Assignee: Cannon USA, Inc.
    Inventor: Roy B. Hammer