Patent ID: 7380615
Filing Date: 2008-06-03
Classification: A01B,E02D,G01N

Abstract:
1. A core sample extraction system for obtaining a core sample of soil, said system comprising: a boring tube including a top end and a bottom end, said bottom end being driven into the soil to isolate a plug of the soil when said boring tube is struck by a mallet; an extraction assembly being positioned in said boring tube, said extraction assembly engaging the plug in said boring tube and pushing the plug out of said bottom end when said extraction assembly is forced through said boring tube, said extraction assembly including a drive rod extending into said boring tube through said top end of said boring tube, a protruding end of said drive rod being actuated to advance said drive rod into said boring tube and force the plug out of said bottom end, said extraction assembly including a limiting collar engaging said drive rod, said limiting collar being abutted against said top end of said boring tube to inhibit said drive rod being fully driven into said boring tube; and said boring tube including an abutting collar outwardly extending from said boring tube and being positioned adjacent said top end, said abutting collar abutting the soil to indicate a maximum depth of said boring tube is to be driven into the soil.