Patents by Inventor Stephen H. Caldwell

Stephen H. Caldwell 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).

  • Flow anomaly detector
    Patent number: 6439062
    Abstract: An apparatus for detecting an anomaly in a flowing stream includes a set of blades rotatably suspended in the flowing stream and aligned with a normal flow direction of the flowing stream. The blades are configured to rotate at one rate when the anomaly is present in the flowing stream and to rotate at a different rate when the anomaly is absent from the flowing stream. A device is prescribed for measuring rate of rotation and rotation direction of the blades.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: August 27, 2002
    Inventors: Stephen T. Stark, Stephen H. Caldwell
  • Flow anomaly detector
    Publication number: 20010054320
    Abstract: An apparatus for detecting an anomaly in a flowing stream includes a set of blades rotatably suspended in the flowing stream and aligned with a normal flow direction of the flowing stream. The blades are configured to rotate at one rate when the anomaly is present in the flowing stream and to rotate at a different rate when the anomaly is absent from the flowing stream. A device is prescribed for measuring rate of rotation and rotation direction of the blades.
    Type: Application
    Filed: July 30, 2001
    Publication date: December 27, 2001
    Inventors: Stephen T. Stark, Stephen H. Caldwell
  • Flow anomaly detector
    Patent number: 6267013
    Abstract: An apparatus for detecting an anomaly in a flowing stream includes a set of blades rotatably suspended in the flowing stream and aligned with a normal flow direction of the flowing stream. The blades are configured to rotate at one rate when the anomaly is present in the flowing stream and to rotate at a different rate when the anomaly is absent from the flowing stream. A device is prescribed for measuring rate of rotation and rotation direction of the blades.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: July 31, 2001
    Inventors: Stephen T. Stark, Stephen H. Caldwell