Patents by Inventor David L. Evenwoll

David L. Evenwoll 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).

  • Protected sensor for granular materials
    Patent number: 4503424
    Abstract: An apparatus for detecting the presence of granular material at a predetermined location in conduit adapted to contain the flow of granular material and in containers adapted to store granular material, wherein the upper portion of a sensing terminal is embedded in a protective housing. The protective housing has a material deflecting surface formed thereon and the lower portion of the sensing terminal protrudes from the protective housing opposite the material deflecting surface. The sensing terminal is adapted to exhibit a change in at least one of its electrical characteristics when the lower portion is in communication with granular material. Means are provided for mounting the protective housing and sensing terminal in a predetermined orientation relative to the container or conduit wall so that the flow of granular material is substantially diverted away from the lower portion of the sensing terminal.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: March 5, 1985
    Assignee: Cargill, Inc.
    Inventor: David L. Evenwoll