Patents by Inventor Sandro Zandonella Balco

Sandro Zandonella Balco 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).

  • Method and safety device for ground fault circuit
    Patent number: 7636224
    Abstract: The invention refers to a method and an apparatus (1) for protecting people against leakage currents while using appliances such as home appliances or the like. The apparatus (1) is provided with a differential switch (20) normally open and a differential current transformer (39) which generates a signal proportional to the leakage current, an elaboration unit (50) interfaced with the latter acquires said signal and keeps the switch (20) closed until a dangerous condition is met, corresponding to an acquired signal having a magnitude greater than a limit value.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: December 22, 2009
    Assignee: Trinity S.A.
    Inventor: Sandro Zandonella Balco
  • Method and safety device for ground fault circuit
    Publication number: 20070177325
    Abstract: The invention refers to a method and an apparatus (1) for protecting people against leakage currents while using appliances such as home appliances or the like. The apparatus (1) is provided with a differential switch (20) normally open and a differential current transformer (39) which generates a signal proportional to the leakage current, an elaboration unit (50) interfaced with the latter acquires said signal and keeps the switch (20) closed until a dangerous condition is met, corresponding to an acquired signal having a magnitude greater than a limit value.
    Type: Application
    Filed: April 19, 2004
    Publication date: August 2, 2007
    Inventor: Sandro Zandonella Balco