Patents by Inventor John E. Jahnke

John E. Jahnke 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).

  • Die lift tool for rotary punch machine
    Patent number: 5429573
    Abstract: A die lift tool removes worn or damaged dies from their bores in the female wheel of a rotary punch machine. The tool has a generally cylindrical camming portion with a segment removed to form a lowered surface. The tool is inserted into openings located below die bores with the lowered surface in contact with the bottom of a die. When the tool is rotated, the die is displaced outwardly from its bore by the camming portion for removal from the wheel.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: July 4, 1995
    Assignee: Economy Machine & Tool Company
    Inventors: John E. Jahnke, Paul D. Rauscher