Patents by Inventor Ivano de Vietro

Ivano de Vietro 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).

  • Apparatus for the feed and the speed and torque control of a hydraulic motor with variable displacement at constant pressure
    Patent number: 4949541
    Abstract: The apparatus for the feed and control of the speed and torque of a hydraulic motor having variable swept volume according to this invention comprises a hydraulic feed device for the motor, adapted for supplying the required flow rate of hydraulic fluid under all conditions at the working pressure, a constant pressure hydraulic control circuit associated with the hydraulic device or devices for varying the swept volume fo the motor, adapted for modifying the swept volume itself in relation to the pressure of the hydraulic fluid supplied to the motor, and a flow regulator valve with proportional control, piloted by an electronic regulator generating a control signal for the valve and receiving the signal of a sensor of the rotational speed of the motor and a reference signal.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: August 21, 1990
    Assignee: Riva Calzoni S.P.A.
    Inventor: Ivano de Vietro