Patents by Inventor Stanley G. Crow

Stanley G. Crow 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).

  • Improved method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus
    Patent number: 5195879
    Abstract: A method for providing a continuous injection of a constant amount of a desired treatment chemical into a flowing stream is described. This method insures that the concentration of the desired treatment chemical is maintained at a relatively uniform concentration throughout the flowing stream. A constant flow pumping apparatus for providing the continuous injection of the treatment chemical is also described. The pumping apparatus includes multiple positive displacement pumps which are driven by a cam that such that the rates of displacement of the displaceable members of the positive displacement pumps is a constant positive value. This insures that the pumping apparatus provides a constant flow of the treatment chemical being injected into a flowing stream. Providing a uniform concentration of a treatment chemical in a flowing stream maximizes the benefit of the treatment chemical.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: March 23, 1993
    Assignee: Nalco Chemical Company
    Inventors: D. Dwaine Reese, Roy D. Sawyer, Stanley G. Crow
  • Method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus
    Patent number: 5066199
    Abstract: A method for providing a continuous injection of a constant amount of a desired treatment chemical into a flowing stream is described. This method insures that the concentration of the desired treatment chemical is maintained at a relatively uniform concentration throughout the flowing stream. A constant flow pumping apparatus for providing the continuous injection of the treatment chemical is also described. The pumping apparatus includes multiple positive displacement pumps which are driven by a cam such that the rates of displacement of the displaceable members of the positive displacement pumps is a constant positive value. This insures that the pumping apparatus provides a constant flow of the treatment chemical being injected into a flowing stream. Providing a uniform concentration of a treatment chemical in a flowing stream maximizes the benefit of the treatment chemical.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: November 19, 1991
    Assignee: Nalco Chemical Company
    Inventors: D. Dwaine Reese, Roy D. Sawyer, Stanley G. Crow