Patents by Inventor Myriam Gaieta Vannucci

Myriam Gaieta Vannucci 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).

  • Traction control valve for hydraulic shock absorber
    Patent number: 9151353
    Abstract: The present shock absorber has a pressure tube with a compression chamber and a traction chamber, separated by a piston provided with a traction passage. The valve includes: a counter pressure chamber loaded by piston, provided with an upper opening and a control base, open to the compression chamber, where a hollow sealing plug is displaceable between a closed position, hence communicating traction passage only with the counter pressure chamber, and open positions; a return spring driving sealing plug to its closed position; and an inertial seal, inside the counter pressure chamber and displaceable from inoperative position, away from the control base, to operative position, where it blocks said base, increasing hydraulic pressure in the counter pressure chamber to hydraulically drive sealing plug to its closed position when piston is subjected to a given upward acceleration.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: October 6, 2015
    Assignee: Magneti Marelli Cofap Companhia Fabricador de Pecas
    Inventors: Guilherme Caravieri de Abreu, Sergio Nelo Vannucci, Myriam Gaieta Vannucci
  • TRACTION CONTROL VALVE FOR HYDRAULIC SHOCK ABSORBER
    Publication number: 20130248307
    Abstract: The present shock absorber has a pressure tube with a compression chamber and a traction chamber, separated by a piston provided with a traction passage. The valve includes: a counter pressure chamber loaded by piston, provided with an upper opening and a control base, open to the compression chamber, where a hollow sealing plug is displaceable between a closed position, hence communicating traction passage only with the counter pressure chamber, and open positions; a return spring driving sealing plug to its closed position; and an inertial seal, inside the counter pressure chamber and displaceable from inoperative position, away from the control base, to operative position, where it blocks said base, increasing hydraulic pressure in the counter pressure chamber to hydraulically drive sealing plug to its closed position when piston is subjected to a given upward acceleration.
    Type: Application
    Filed: March 30, 2011
    Publication date: September 26, 2013
    Inventor: Myriam Gaieta Vannucci