The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 2005
Filed:
Aug. 18, 2003
John W. Lundstrom, La Verne, CA (US);
Dennis Anderson, Carson City, NV (US);
Dave Straley, Incline Village, NV (US);
William Ehni, Carson City, NV (US);
Darrell R. Word, Leander, TX (US);
John W. Lundstrom, La Verne, CA (US);
Dennis Anderson, Carson City, NV (US);
Dave Straley, Incline Village, NV (US);
William Ehni, Carson City, NV (US);
Darrell R. Word, Leander, TX (US);
Other;
Abstract
The object of the Electrical Density Gauge (EDG) invention is to provide a low cost, portable, non-nuclear, and rugged field-use device that measures dry density in soils that have been constructed for use as road-beds and building foundations. This data is used to ensure the quality control of the constructed foundation. The electrical properties of soil are measured at a radio frequency using probes driven into the soil. To calibrate EDG, certain algorithms of these electrical properties are related to physically measured wet densities and unit weights of water for a plurality of calibration test spots. Correlation regressions are found, that are used to convert values of the electrical properties measured at unknown field test spots into values of dry density.