Patents by Inventor Eric Hamman

Eric Hamman 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).

  • Digital servo valve system
    Patent number: 5036886
    Abstract: A novel digital servo valve system for use in displacing an actuator is capable of operating either in closed or open loop mode. The system includes a controller that compares computed values of actuator parameters with preselected parameter values and iteratively determines therefrom command signals for the servo valve. The servo valve is characterized by a ball screw mechanism that eliminates mechanical backlash and a torsion bar which increases radial and angular compliance. A servo valve provided according to the present invention also displays reduced flow forces using a simple, inexpensive valve body in combination with a uniquely configured displaceable spool.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: August 6, 1991
    Assignee: Olson Controls, Inc.
    Inventors: Zenny Olsen, Albert J. Sperbeck, Eric Hamman, Gary D'Angelo
  • Digital servo valve system
    Patent number: 4951549
    Abstract: A novel digital servo valve system for use in displacing an actuator is capable of operating either in closed or open loop mode. The system includes a controller that compares computed values of actuator parameters with preselected parameter values and iteratively determines therefrom command signals for the servo valve. The servo valve is characterized by a ball screw mechanism that eliminates mechanical backlash and a torsion bar which increases radial and angular compliance. A servo valve provided according to the present invention also displays reduced flow forces using a simple, inexpensive valve body in combination with a uniquely configured displaceable spool.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: August 28, 1990
    Assignee: Olsen Controls, Inc.
    Inventors: Zenny Olsen, Albert J. Sperbeck, Eric Hamman, Gary D'Angelo