Patents by Inventor Ronaldo Riberio Duarte

Ronaldo Riberio Duarte 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: 8035248
    Abstract: A system and a process for energizing loads through a control unit, said loads being energized from a power network, said system comprising: connecting elements, each including a processing unit operatively connected to a respective power switch so as to lead the latter to opening and closing conditions, de-energizing and energizing a respective adjacent load that is electrically coupled to the connecting element; a pair of electrical conductors connected to a power network for energizing the loads and which are disposed so as to define an energizing means which is common to the connecting elements and to the control unit; and a signal conductor not galvanically isolated from the power network and which is common to the processing units and to the control unit, connecting them so as to allow the control unit to instruct, through the processing units and through coded electrical signals, the opening and closing of each respective power switch.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: October 11, 2011
    Assignee: Whirlpool S.A.
    Inventors: Ronaldo Riberio Duarte, Marcos Guilherme Schwarz
  • Patent number: 7471058
    Abstract: A starting device and starting method for a single-phase induction motor, housing: a stator having a running coil and a starting coil; a running switch and a starting switch which is conducted to an open condition upon completion of the motor start. The starting device includes: a starting circuit including a control unit which receives, from a current sensor, signals representative of the current level being supplied to the stator, the control unit being connected to the running and the starting switches, for instruction the open and closed conditions thereof; the open condition of the starting switch being defined when the ratio between the present current level supplied to the stator and the starting current level, upon the closing of the starting and the running switches, reaches a predetermined value.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: December 30, 2008
    Assignee: Empresa Brasileira De Compressores S.A.
    Inventors: Ronaldo Riberio Duarte, Marcos Guilherme Schwarz, Luiz Magalhaes Medeiros Neto