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US 4,336,849 AGranted
Earth drilling device for extracting earth samples
OwnerMax Huginventor
Life of this patent
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Abstract
An earth drilling device for extracting earth samples including a rotatable drill tube and means for rotating said drill tube, a drill bit supported by said rotatable drill tube, said drill bit and said drill tube defining an inner shoulder, a hollow probe movably disposed within said drill tube and adapted to be supported by said inner shoulder, an exchangeable plastic sleeve disposed within said hollow probe, and means for extracting said hollow probe and associated plastic sleeve containing an earth sample without removing the drill tube from the earth.
Claims6
An earth drilling device for extracting earth core samples including,
- a rotatable drill tube and means for rotating said drill tube;
- a drill bit supported by said rotatable drill tube, said drill bit and said drill tube defining an inner shoulder;
- a hollow probe movably disposed within said drill tube and adapted to be supported by said inner shoulder;
- an exchangeable thin plastic sleeve of uniform thickness disposed within said hollow probe, said sleeve containing a multiplicity of axis parallel pre-folds uniformly distributed along its circumference, and exhibiting a polygonal cross section which conforms to the circular inner circumference of said hollow probe to form a smooth, cylindrical receiving surface for said earth core samples when inserted in said hollow probe;
- and
- means for extracting said hollow probe and associated plastic sleeve containing an earth core sample without removing the drill tube from the earth.
3 more elements
Dependencies are inferred from the claim text.