Patents by Inventor Nathan A. Stehman

Nathan A. Stehman 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).

  • Liquid level sensing device
    Patent number: 6935173
    Abstract: A liquid level sensor includes a housing with circuitry provided therein. An inner and outer tube extend from the housing. The inner tube is positioned within a hollow center of the outer tube to form a coaxial configuration. A slot extends through the wall of the outer tube into the hollow center of the outer tube. The slot extends essentially the entire length of the outer tube. The circuitry, outer tube, and inner tube form a capacitive circuit to measure liquid. The slot allows the liquid to flow more easily into the hollow center of the outer tube and between the inner tube and outer tube to allow the sensor to provide accurate measurements with many types of fluids. The circuitry generates a pulse width modular output which is sent to a gauge to provide a visual representation of the level of the fluid in the container.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: August 30, 2005
    Assignee: Maxima Technologies & Systems, Inc.
    Inventors: Nathan A. Stehman, Andrew K. Snyder, Jr., Shawn P. Doyle
  • Liquid level sensing device
    Publication number: 20030233875
    Abstract: A liquid level sensor includes a housing with circuitry provided therein. An inner and outer tube extend from the housing. The inner tube is positioned within a hollow center of the outer tube to form a coaxial configuration. A slot extends through the wall of the outer tube into the hollow center of the outer tube. The slot extends essentially the entire length of the outer tube. The circuitry, outer tube, and inner tube form a capacitive circuit to measure liquid. The slot allows the liquid to flow more easily into the hollow center of the outer tube and between the inner tube and outer tube to allow the sensor to provide accurate measurements with many types of fluids. The circuitry generates a pulse width modular output which is sent to a gauge to provide a visual representation of the level of the fluid in the container.
    Type: Application
    Filed: June 17, 2003
    Publication date: December 25, 2003
    Inventors: Nathan A. Stehman, Andrew K. Snyder, Shawn P. Doyle