Patents by Inventor Paul D. Pfaff

Paul D. Pfaff 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).

  • Self-stripping punch with ears
    Patent number: 4009625
    Abstract: A side outlet, self-stripping punch adapted to be mounted in a bore in a die board. The self-stripping punch includes an elongated, cylindrical base having a cutting edge on the top end and a pair of locking ears on the bottom end to prevent rotation of the punch in the die board. The locking ears are formed by upsetting them from the punch base, and they each have a flat face disposed on a common plane passing through the longitudinal axis of the punch.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: March 1, 1977
    Assignee: Bernal Incorporated
    Inventor: Paul D. Pfaff