Patents Assigned to Poliauto di Pietro Parietti & C. S.n.c.
  • Pressure reducer for liquid and compressed gases
    Patent number: 4841941
    Abstract: A pressure reducer designed to feed gas-driven vehicles, of the type comprising an inlet valve, an outlet valve, and a gas by-pass valve, wherein the valvular closing elements are fitted with systems designed to connect areas situated on opposite sides of the valvular closing elements in order to cancel out the force components due to the gas pressure, and systems designed to regulate the opening of the valvular elements according to the pressure detected at the outlet.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: June 27, 1989
    Assignee: Poliauto di Pietro Parietti & C. S.n.c.
    Inventor: Pietro Parietti