Patents by Inventor Keith Wolford

Keith Wolford 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).

  • Brushless DC motor assembly control circuit
    Patent number: 6008603
    Abstract: A novel two-phase brushless motor drive assembly. The motor drive assembly is made of two parts, a motor assemble and a motor control circuit.The motor assembly, receives a first wire providing electric power, a second wire providing a ground connection, and a third wire. The motor assembly includes, a two-phase brushless motor. It also includes a motor drive circuit, responsive to a speed control voltage signal on the third wire and the electric power on the first wire, providing drive power to the motor to drive the motor to a speed determined by the speed control voltage signal. The motor assembly also includes a sensor circuit providing a sensed speed current signal on the third wire, having a current representing the rotational speed of the motor.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: December 28, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Steven C. Jones, Keith Wolford
  • Brushless DC motor assembly control circuit
    Patent number: 5952798
    Abstract: A novel two-phase brushless motor drive assembly. The motor drive assembly is made of two parts, a motor assemble and a motor control circuit.The motor assembly, receives a first wire providing electric power, a second wire providing a ground connection, and a third wire. The motor assembly includes, a two-phase brushless motor. It also includes a motor drive circuit, responsive to a speed control voltage signal on the third wire and the electric power on the first wire, providing drive power to the motor to drive the motor to a speed determined by the speed control voltage signal. The motor assembly also includes a sensor circuit providing a sensed speed current signal on the third wire, having a current representing the rotational speed of the motor.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: September 14, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Steven C. Jones, Keith Wolford