Patents by Inventor Larry A. Dennis

Larry A. Dennis 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: 7152694
    Abstract: A post driver is powered by a pair of hydraulic cylinders, one on either side of the hammer to provide a balanced lifting force to the hammer. A post retaining cap is formed to provide a recess for the post. The orientation of the driver may be controlled about a horizontal axis so the post may be driven vertically without regard to the contour of the ground. The post driver is further provided with an extensible beam and foot which is extended to engage the ground and further support the driver.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: December 26, 2006
    Inventor: Larry A. Dennis
  • Publication number: 20030178212
    Abstract: A post driver is powered by a pair of hydraulic cylinders, one on either side of the hammer to provide a balanced lifting force to the hammer. A post retaining cap is formed to provide a recess for the post. The orientation of the driver may be controlled about a horizontal axis so the post may be driven vertically without regard to the contour of the ground. The post driver is further provided with an extensible beam and foot which is extended to engage the ground and further support the driver.
    Type: Application
    Filed: February 12, 2003
    Publication date: September 25, 2003
    Inventor: Larry A. Dennis