Patents by Inventor Charles J. Dvorak

Charles J. Dvorak 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).

  • Powered press with manual punch and die alignment capability
    Patent number: 4907481
    Abstract: A latch mechanism in one position causes a ram and the punch mounted thereon to be forcefully actuated in unison with the pivotal arm constituting part of the drive means. In a second position of the latch mechanism, the ram, together with the punch, can be manually lowered without being powered so that an alignment of the die with the punch can be achieved before performing a powered punching operation.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: March 13, 1990
    Inventors: Jim Dvorak, Charles J. Dvorak