Patents by Inventor David V. Charlson

David V. Charlson 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).

  • Patent number: 4112731
    Abstract: A semi-automatic sheet metal forming machine for forming light gauge metal having a bed formed of a plurality of adjustable and interchangeable spaced spacer plates of various widths, a forming bar having a plurality of removable and interchangeable forming fingers of various widths, and a clamping bar including a plurality of removable slidably mounted clamping fingers of various widths, the clamping bar and forming bar being hydraulically operated and synchronized for semi-automatic repeated forming operations. By adjusting and utilizing different width combinations of the clamping and forming fingers and spacer plates, an operator can perform almost any desired sheet metal forming operation which heretofore would have required separate and expensive special dies.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: September 12, 1978
    Assignee: Manufacturers Systems, Inc.
    Inventors: Leroy E. Anderson, David V. Charlson, Mark A. Vierkant