Patents by Inventor Leslie Howard Pennington

Leslie Howard Pennington 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).

  • Patent number: 5673762
    Abstract: A method for obtaining saturated soil samples includes conventional drilling equipment with a central hollow which receives a conventional soil sample collection device. An elongate sleeve with a closed end is nested about the sample collection device to prevent soil from entering the sample device before it is in position adjacent the soil to be sampled. Once in position, force is applied to the sample collection device to drive it into the soil. As the sample collection device is driven into the soil, it penetrates through the sleeve. The sample collection device is then withdrawn, leaving the sleeve in the hole formed by the collection device to help prevent collapse of the walls. The sleeve also helps to minimize any negative pressures which might develop as the sample collection device is withdrawn and which can result in soil plugging the central hollow of the auger.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: October 7, 1997
    Inventor: Leslie Howard Pennington