Patents by Inventor Andrzej Graca

Andrzej Graca 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: 6813836
    Abstract: A tool for cutting rigid sheet material comprises a first shearing member having a first cutting edge; a second shearing member pivotally connected at one end to the first shearing member, the second shearing member have a second cutting edge engaged with the first cutting edge; and a pair of handles operatively connected to the shearing members for pivotally moving the shearing member relative to one another. The first shearing member is preferably a twisted, U-shaped member having two legs, with the second shearing member mounted between the legs. An opening or slot is provided above the second shearing member to accommodate movement of sheet material over both the first and second shearing members. The tool cuts both left and right curves and straight lines in rigid materials such as sheet metal.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 9, 2004
    Inventor: Andrzej Graca
  • Publication number: 20040000057
    Abstract: A tool for cutting rigid sheet material comprises a first shearing member having a first cutting edge; a second shearing member pivotally connected at one end to the first shearing member, the second shearing member have a second cutting edge engaged with the first cutting edge; and a pair of handles operatively connected to the shearing members for pivotally moving the shearing member relative to one another. The first shearing member is preferably a twisted, U-shaped member having two legs, with the second shearing member mounted between the legs. An opening or slot is provided above the second shearing member to accommodate movement of sheet material over both the first and second shearing members. The tool cuts both left and right curves and straight lines in rigid materials such as sheet metal.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventor: Andrzej Graca