Patents by Inventor Dirrick J. Ferrell

Dirrick J. Ferrell 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).

  • Control and method for positioning a tool of a construction apparatus
    Patent number: 6364028
    Abstract: A control system for establishing grade and elevation control for a tool of a construction apparatus for maintaining the vertical position of the tool relative to a reference includes a first ultrasonic transducer configured to be carried by the construction apparatus, with the first transducer transmitting and receiving acoustic waves, at least one reflector, a second ultrasonic transducer configured to be carried by the construction apparatus, with the second transducer receiving acoustic waves, and a controller coupled to the first and second ultrasonic transducers which drive the transducers to produce an acoustic wave and monitors the time reflections of the acoustic wave are respectively received by the first and second transducers.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: April 2, 2002
    Assignee: Laser Alignment, Inc.
    Inventors: Dirrick J. Ferrell, Ross C. Stoepker, Timothy E. Steenwyk, Eric Jon Walstra
  • Control and method for positioning a tool of a construction apparatus
    Patent number: 6152238
    Abstract: A control system for establishing grade and elevation control for a tool of a construction apparatus for maintaining the vertical position of the tool relative to a reference includes a first ultrasonic transducer configured to be carried by the construction apparatus, with the first transducer transmitting and receiving acoustic waves, at least one reflector, a second ultrasonic transducer configured to be carried by the construction apparatus, with the second transducer receiving acoustic waves, and a controller coupled to the first and second ultrasonic transducers which drive the transducers to produce an acoustic wave and monitors the time reflections of the acoustic wave are respectively received by the first and second transducers.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: November 28, 2000
    Assignee: Laser Alignment, Inc.
    Inventors: Dirrick J. Ferrell, Ross C. Stoepker, Timothy E. Steenwyk, Eric Jon Walstra