Boring or penetrating the earth – Boring without earth removal – Combined with earth removal
Patent
1996-10-02
1999-02-02
Gregory, Bernarr E.
Boring or penetrating the earth
Boring without earth removal
Combined with earth removal
175 58, E21B 4902
Patent
active
H00017809
ABSTRACT:
A soil sample core system includes an outer cylinder having first and sec ends; a sample tube for sliding within the outer cylinder; a tip sleeve mounted to the first end of the outer cylinder; a push pipe which may be mounted to the second end of the outer cylinder to prevent the sample tube from sliding out of the second end; a tapered tip which may be selectively extended out of the tip sleeve and which may be selectively retracted into the push pipe; an end cap having a threaded bore which may be mounted to the second end of the outer cylinder in place of the push pipe; a threaded shaft threaded in the threaded bore; a piston rotatively mounted to one end of the threaded shaft for sliding within the outer cylinder; and a torque transmitting element mounted to the other end of the threaded shaft for transferring torque to thread the shaft through the threaded aperture.
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Fendelman Harvey
Gregory Bernarr E.
Kagan Michael A.
Lipovsky Peter A.
The United States of America as represented by the Secretary of
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