Patents by Inventor John F. Hatzmann

John F. Hatzmann 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).

  • Combined backstop and brake
    Patent number: 3982753
    Abstract: A device functioning as a combined backstop and brake for a rotating member. A pivotably mounted spring biased arm rides against a band of resilient material adapted to rotate with the member. The arm thereby frictionally applies a controlled braking force to the rotating member. Reverse rotation of the member causes the arm to depress the resilient material of the band and prevent such reverse motion.
    Type: Grant
    Filed: March 12, 1973
    Date of Patent: September 28, 1976
    Assignee: Xerox Corporation
    Inventors: John F. Coleman, Donald P. Miller, John F. Hatzmann