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Dynamic cone penetration device

  • US 5,616,833 A
  • Filed: 06/21/1996
  • Issued: 04/01/1997
  • Est. Priority Date: 04/13/1995
  • Status: Expired due to Fees
First Claim
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1. In a method of measuring soil denseness wherein a penetrating cone at one end of a cone rod is driven a predetermined distance into the soil by counting the number of strikes of a predetermined force on a striking surface of the cone rod, of a predetermined force, the improvement of reducing soil friction between the cone rod and the soil, comprising the steps of rotating the cone rod at a sufficient speed to reduce friction between the cone rod and the soil while the cone is driven the predetermined distance into the soil.

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