Patents by Inventor James E. Aplin

James E. Aplin 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).

  • Monitoring of soil
    Patent number: 5402667
    Abstract: Methods and apparatus for monitoring the compaction of soil material in a defined region include hammer structure for impacting soil material in the defined region, a sensor for disposition at the bottom of the defined region the includes a transducer for developing an electric signal in response to energy transmitted through soil material from the hammer structure, and a control module responsive to electric signals from the sensor for providing an indication of the quality of compaction of soil material in the defined region.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: April 4, 1995
    Assignee: Gas Research Institute
    Inventors: Dick T. Atkinson, James E. Aplin, Arnis Mangolds, Daniel J. Foley
  • Monitoring compaction of backfill
    Patent number: 5105650
    Abstract: Methods and apparatus for monitoring the compaction of backfill material in an excavation include hammer structure for impacting backfill material in the excavation, a sensor module for disposition at the bottom of the excavation to be backfilled that includes a transducer for developing an electric signal in response to energy transmitted through backfill material from the hammer structure, and a control module responsive to electric signals from the sensor module for providing an indication of the quality of compaction of backfill material in the excavation.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: April 21, 1992
    Assignee: Gas Research Institute
    Inventors: Dick T. Atkinson, James E. Aplin, Arnis Mangolds, Daniel J. Foley