Patents by Inventor Gerald Lilienthal

Gerald Lilienthal 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).

  • Using a micromachined magnetostatic relay in commutating a DC motor
    Patent number: 6713908
    Abstract: A DC motor is commutated by rotating a magnetic rotor to induce a magnetic field in at least one magnetostatic relay in the motor. Each relay is activated in response to the magnetic field to deliver power to at least one corresponding winding connected to the relay. In some cases, each relay delivers power first through a corresponding primary winding and then through a corresponding secondary winding to a common node. Specific examples include a four-pole, three-phase motor in which each relay is activated four times during one rotation of the magnetic rotor.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: March 30, 2004
    Assignee: California Institute of Technology
    Inventors: Yu-Chong Tai, John A. Wright, Gerald Lilienthal